Automobile Coolant Leak: How to Identify and Fix Any Leak

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A coolant leak can be a huge issue if left untreated. Without patching your leak, your engine might overheat, causing irreparable damage to other parts of your vehicle. Luckily, nipping an automobile coolant leak in the bud before it has a chance to cause further damage is relatively straightforward, even for novice car owners. Continue reading below to find out where your coolant leak is coming from and how to fix it. Alternatively, watch the video below for a walkthrough of how to fix a coolant leak at home! 

 

How to Fix an Automobile Coolant Leak 

Can I Drive With a Coolant Leak?

Before we get to how to fix a coolant leak, let’s talk about why it is important to fix your leak quickly.  If your car is leaking coolant, it will run normally until the coolant level gets too low.  Once it is low, there will not be enough coolant to keep your engine at the normal operating temperature and the engine will overheat.  If your engine overheats, it can cause significant damage to the block, heads and other components.  To learn more check out our article on engine overheating.

Do I Have a Coolant Leak?

Checking the coolant level regularly is the best way to find out if you have a leak.  Remember, your coolant expands and changes the level. So, you need to check the level when your vehicle is either all the way warmed up or completely cold.  If you notice the level dropping steadily then you’ve got a leak somewhere.  Many vehicles have a sensor in the coolant reservoir that will illuminate a light or message on your dashboard when the reservoir gets too low so if you see that message add coolant and check for leaks.

Automobile Coolant Leak Symptoms

Here are a few common symptoms that might Indicate an automobile coolant leak: 

  • A sweet, antifreeze smell
  • Overheating Engine
  • Puddles Under the Car
  • Low Coolant Levels

Locating the Source of the Leak

Once you suspect a leak, identifying the source of your automobile coolant leak is a crucial step in understanding how to fix it. Here are a few common places for leaks to show up and how to deal with them:

  • Hoses
  • Thermostat
  • Heater core
  • Radiator
  • Head gasket

Hoses

There are at least four hoses associated with the cooling system in your vehicle. One hose carries coolant from the bottom of the radiator into the water pump and another hose carries coolant from the top of the engine back to the radiator. There are also two hoses that carry coolant to and from the heater core, which is most likely located under your dashboard. So, that hose will travel from the motor back to the firewall or the rear of the engine bay. 

Overtime, due to heat and age, the ends of those hoses can become brittle and begin to crack where they are attached causing small leaks.  In this case, the best thing to do is purchase a new hose and clamps and replace the broken hose. Here is more information on how to fix a radiator hose leak.

Thermostat

The thermostat is usually on the top of the engine, but in many makes can be located on the bottom (Subarus, for instance).  It’s likely near the water pump and  enclosed in a housing that is near one of the hoses going to the radiator at the front of your vehicle. This housing is usually bolted on so that it can be easily removed if you need to replace the thermostat. It is possible that the thermostat housing can develop a leak where it is bolted together.  In this case, consider replacing the thermostat housing gasket. Since you already will have it apart, consider replacing the thermostat as well since it is a relatively inexpensive part.

Heater Core

As discussed above, your heater core is located under your dashboard near the cabin ventilation fan. Warm coolant from your engine is pumped through the heater core, then your cabin ventilation system uses that to heat the air in the cabin of your vehicle. If the heater core is leaking you will find coolant on the floorboards of your vehicle, most likely on the passenger side.  Removing the heater core can be an expensive and tedious job requiring the removal of a significant portion of the interior of your vehicle.  To repair the leak in your current heater core use BlueDevil Pour-N-Go.  BlueDevil Pour-N-Go is a non-particulate, chemical-based leak sealer that reacts at the temperature differential created at the leak point in your cooling system.  BlueDevil Pour-N-Go will create a chemical weld at the leak, permanently sealing the leak in your heater core without expensive removal. Simply add BlueDevil Pour-N-Go to your vehicle’s radiator and allow up to 2 days drive time for the leak to seal.

Radiator

If you discover a radiator leak you can repair it by using BlueDevil Radiator and Block Seal to seal that leak. Since your radiator is in the front of your vehicle and a relatively fragile piece of equipment it is not unusual for it to get holes from rocks or road debris.  BlueDevil Pour-N-Go can save you from the costly repair of purchasing a new radiator.

Head Gasket

You can tell if you have an external coolant leak from your head gasket if you discover coolant leaking from below your exhaust or intake manifold.  We also recommend you check for other signs of a head gasket leak before jumping to conclusions.

External head gasket leaks must be sealed very quickly, as they will expand over time if they are left untreated.  If you have an external head gasket leak use BlueDevil Head Gasket Sealer.  BlueDevil Head Gasket Sealer can seal the head gasket leak even in vehicles with large cooling capacities, like V8 engines or truck engines, and is powerful enough to stop even large leaks.  You can purchase BlueDevil Head Gasket Sealer here.

Possibly an Overfill?

Oftentimes, an overfilled coolant tank will be mistaken as a leak. If the overflow tank is too full coolant will spill out of that reservoir and may look like a leak.  If this is the case, you should only see coolant overflowing the tank 1 or 2 times and after that, the excess coolant will be removed from the system and you shouldn’t see any more overflow.

How to Fix Any Automobile Coolant Leak in One Simple Step

oil stop leak graphicIf you do find a leak, remember BlueDevil Pour-N-Go and BlueDevil Head Gasket Sealer are guaranteed to seal your cooling system leak easily and permanently without costly replacements or mechanics bills.

Shop Our Products!

You can also purchase any Blue Devil product from our partnering local auto parts retailers like:

  • AutoZone
  • Advance Auto Parts
  • Bennett Auto Supply
  • CarQuest Auto Parts
  • NAPA Auto Parts
  • O’Reilly Auto Parts
  • Pep Boys
  • Fast Track
  • Bumper to Bumper Auto Parts Specialists
  • S&E Quick Lube Distributor
  • DYK Automotive
  • Fisher Auto Parts stores
  • Auto Plus Auto Parts stores
  • Hovis Auto & Truck Supply stores
  • Salvo Auto Parts
  • Advantage Auto Stores
  • Genuine Auto Parts stores
  • Bond Auto Parts stores
  • Tidewater Fleet Supply
  • Bumper to Bumper Auto Parts
  • Any Part Auto Parts
  • Consumer Auto Parts

Pictures Provided by:

coolant_leak.jpg – By Liorpt – Licensed by Getty Images – Original Link

209 responses to "Automobile Coolant Leak: How to Identify and Fix Any Leak"

209 Comments

  1. patrick beal on July 23, 2014 at 1:02 am

    I used this for the coolant leak I have in my head driver side cylinder 3 no it would only leak a little I would have to fill my reserve every 1000 miles after I used this (I heard nothing but good about this stuff .) now I have steam that comes out after it sits 10 to 15 min when hot if it sits over night it will blow it all out from what got in it over night so it made things worse now its never done this before and I fallow the instructions to a t I just thought you guys should know it suck because this is my only means of transport this is a 97 ranger 4.0 pickup

    • BlueDevil Pro on July 29, 2014 at 5:37 pm

      Please contact us at 888.863.0426 so that we may assist you and help diagnose the problem at hand.

      • Gina myers on September 30, 2015 at 2:02 pm

        I have a leak coming from the bottom of my van near the muffler

        • BlueDevil Pro on October 2, 2015 at 9:54 am

          Gina-

          It would be safe and recommended to use the BlueDevil Head Gasket Sealer to seal your coolant leak. The product may be viewed here: http://store.gobdp.com/head-gasket-sealer-38386/

          Feel free to contact us at 888-863-0426 (Mon – Fri, 8:00 AM – 5:00 PM EST with any questions.

          Thank you!

          -BDP

      • Sabrina on November 2, 2015 at 4:18 pm

        It looks like am leaking atifrezz form the hose on the side

        • BlueDevil Pro on November 3, 2015 at 10:57 am

          Sabrina-

          We really don’t manufacture any products that are intended for antifreeze leaks coming from one of the cooling hoses. Your best bet would be to drain the system and replace to hose that has failed.

          Thank you!

          -BDP

      • Nema on December 20, 2016 at 3:33 pm

        Can blue devil head gasket sealant be pored into a resivor with antifreeze in it?

        • BlueDevil Pro on December 21, 2016 at 9:02 am

          Nema-

          The BlueDevil Head Gasket Sealer should not be added through the reservoir. If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the overflow bottle. Once it has been added reconnect the hose and start the idle from that point.

          Thank you!

          -BDP

          • Dave on August 23, 2017 at 12:53 pm

            Hi BD, I m glad I read this because guy at garage said just pour in my reservoir/surge tank…..I have a 2005 saturn vue and my coolant light just came on yesterday, doesnt seem to be leaking a lot, but i do see tiny tiny little puddles in 2 spots on right side closer to engine, so i have a bottle of BD #00209. Do i still pour it into big hose coming directly out of radiator on top left of radiator? thank you.



          • BlueDevil Pro on August 23, 2017 at 3:57 pm

            Adriana-

            If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour BlueDevil into the reservoir. Once it has been added reconnect the hose and start the idle from that point.

            Feel free to contact us at 888-863-0426 with any additional questions.

            Thank you!

            -BDP



          • Tom on April 30, 2022 at 2:03 am

            I only have the reservoir so I’ll use the upper hose as suggested. My question is, do I need to remove the thermostat before using BD Head Gallery Sealer?



          • BlueDevil Pro on May 2, 2022 at 8:36 am

            Tom-

            If you are using the 32 oz. bottle with yellow label, then yes, removing the thermostat is a direction. You are not required to remove the thermostat when using the Pour-N-Go Head Gasket Sealer (16 oz. white label).

            Thank you!

            -BDP



      • Orlando on March 7, 2017 at 4:27 am

        I’m having problems with my 2003 Nissan Altima 2.5 l. It overheats and I’m guessing the coolant is mixing in with my engine oil how can I stop the water mixing with the oil?

        • BlueDevil Pro on March 7, 2017 at 8:57 am

          Orlando-

          Thank you for asking about your Nissan Altima. Based on your description, we recommend using the BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) to stop the coolant loss into the engine oil. You would want to change your oil before and after the BlueDevil process.

          Thank you!

          -BDP

      • Travis T Lee on July 26, 2018 at 7:28 pm

        My infinity fx35 leaks coolant only wen is is at a stand atill with car at a stand still or maybe when I stol

        • BlueDevil Pro on July 27, 2018 at 8:21 am

          Travis-

          Thank you for asking about your Infinity FX35. How quickly are you losing coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

          • Kathy L Mcconnell on June 15, 2021 at 5:51 pm

            I have a 99 b2500 it’s leaking antifreeze where the top goes into the radiator you can see a pin hole leak.



          • BlueDevil Pro on June 16, 2021 at 8:15 am

            Kathy-

            Thank you for asking about your Mazda. Are you saying the leak is coming from the upper radiator hose, hose clamp or from the top of the radiator itself? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



          • Denese H Lawrence on June 28, 2021 at 8:27 pm

            My 2013 chrysler200 is leaking antifreeze on the right side in the front it’s not a lot every time i fill the plastic tub up it disappears where is the leak coming from and how much it cost to repair it



          • BlueDevil Pro on June 29, 2021 at 8:39 am

            Denese-

            Thank you for asking about your Chrysler. How quickly are you losing antifreeze? Is the vehicle overheating at all? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



          • Eddie on March 12, 2022 at 12:01 pm

            Hello. I’m leaking coolant I used Blue devil coolant leak. Seemed ok for few days but then my 2005 range Rover HSE said check coolent level. BUT it hasn’t been leaking like before under middle of vehicle. So idk where the fluid is going? A mechanic said I have a leak in the cooling rods behind engine?? Idk what to do. Plz help



          • BlueDevil Pro on March 14, 2022 at 9:24 am

            Eddie-

            Thank you for asking about your Range Rover. Did you notice any improvement? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



      • Lonnie Smith on August 15, 2018 at 2:56 pm

        When I put antifreeze in my Buick 2006 it runs out the resovoir and underneath in the middle part, at the bottom runs out.

        • BlueDevil Pro on August 15, 2018 at 3:53 pm

          Lonnie-

          Thank you for asking about your Buick. To confirm, are you saying your are losing coolant just as quickly as you add it? If that is the case, unfortunately, having the leaking component replaced would be the only way to remedy the situation. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

    • Rob on December 3, 2015 at 11:25 am

      96 Chevy lumina , car leaking antifreeze and steam coming from behind the engine block , only runs hot when coolant is all gone ,it started out slow leaking and fine ,now it leaks faster what could this be ? N will this fix it ?

      • BlueDevil Pro on December 3, 2015 at 3:49 pm

        Rob-

        Based on your description, we would recommend using the BlueDevil Head Gasket Sealer. As long as your Chevy can idle for 50 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant during that 50 minutes, you should be able to see some good results.

        Thank you!

        -BDP

      • Judy belanger on June 20, 2020 at 2:16 am

        I have a 2003,Malibu it’s leaking antifreeze under the car on passenger side up front under engine

        • BlueDevil Pro on June 22, 2020 at 1:06 pm

          Judy-

          Thank you for asking about your Chevy Malibu. Based on your description, we recommend using the BlueDevil Pour-N-Go Head Gasket Sealer. As long as you are not losing antifreeze too quickly, you would be a good candidate for the product.

          Thank you!

          -BDP

    • Jeremy Williams Richard on January 16, 2017 at 5:38 pm

      Would this work on a 2001 Chevy Silverado manifold gasket leak?

      • BlueDevil Pro on January 17, 2017 at 9:45 am

        Jeremy-

        Thank you for asking about your Chevy Silverado. Yes, the BlueDevil Head Gasket Sealer would be able to seal a manifold gasket leaking water/coolant. Feel free to contact our technical support line at 888-863-0426 with any other questions.

        Thank you!

        -BDP

        • Marilyn Helene Gramlick on November 12, 2021 at 12:51 pm

          Nove22, 2021 Hi there, so if I have a small coolant leak from the lower intake manifold gasket, will this Blue Devil Pro help this problem, poured into the engine coolant cyclinder under metal cap? Then add antifreeze to level and run vehicle with heat on for awhile? Thank you so much..I am a female, who seems to get ‘taken’ by these autoshop places whenever I have a problem with my vehicle. Appeciate your help, Helene

          • BlueDevil Pro on November 12, 2021 at 3:08 pm

            Helene-

            The BlueDevil Head Gasket Sealer would be able to treat a leaking intake manifold gasket. With the engine cold, you would start the engine, turn the heater on and blower to the max and slowly add the product directly into the radiator, through the radiator cap. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



    • Ruben Bautista on March 3, 2022 at 1:18 am

      Hi I have 05 neon 2.0 it started to overheat so I replaced the radi.cap,thermostat, bleeded it and was running fine and the building pressure popped top hose so I was looking for a leak but couldn’t find any while I was changing the battery I noticed that the leak was on driver’s side in back of cylinder 4 so I checked to see if it was in the pistons and nope it leaking from just there between the valve cover and head no other problems I think it coming from the head???

      • BlueDevil Pro on March 3, 2022 at 8:32 am

        Ruben-

        Thank you for asking about your Dodge Neon. Based on your description, it’s possible that you are getting combustion/exhaust gases pumping back into the cooling system. You can use a “Block Dye Tester” to confirm whether or not that is the case.
        BlueDevil Head Gasket Sealer will still work if your vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system.

        Thank you!

        -BDP

  2. Claire on April 19, 2015 at 8:25 pm

    Do I have to drain the car of any remaining coolant first before adding the sealant? If so, where can I find the radiator cap? It appears my car doesn’t have one.

    • BlueDevil Pro on April 20, 2015 at 11:15 am

      Claire-

      If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there. Once it has been added reconnect the hose and start the idle from that point.

      Feel free to contact us at 888-863-0426 with any further questions.

      Thanks!

      -BDP

      • Carlos Perez on October 11, 2015 at 11:40 am

        Will this work in reservoir tank leak?

        • BlueDevil Pro on October 12, 2015 at 2:28 pm

          Carlos-

          No the BlueDevil Head Gasket Sealer is not intended to seal a leak in the reservoir. You will need to get the reservoir tank replaced to repair it.

          Thank you!

          -BDP

  3. Luke on June 15, 2015 at 11:11 pm

    Hi
    I have loss of coolant. At first there were no visible signs, but now its dripping out of my exhaust. I have no white smoke coming out or coolant in oil or oil in coolant. Only thing I can think of is a blown head gasket or cracked head.

    • BlueDevil Pro on June 26, 2015 at 2:17 pm

      Luke-

      We agree, it does sound like you are experiencing the early signs of a blown head gasket. We recommend adding the proper amount of the BlueDevil Head Gasket Sealer to stop the coolant loss and prevent the problem from becoming worse.

      Thank You!

      -BDP

      • Kim Grey on August 27, 2015 at 5:21 pm

        My car was over heating now its leaking coolant from the radiator

        • BlueDevil Pro on August 28, 2015 at 9:28 am

          Kim-

          Please contact our technical support line at 888-863-0426 so that we can get a little more information about your vehicle and see if it is a good candidate for the product.

          Thank you!

          -BDP

      • javier on October 18, 2015 at 1:08 am

        My 2002 dodge ram is leaking look likes between the pulley n water pump..but I replace the water pump 4 months ago.I try putting water but won’t hold it for to llong.wat can it be …? Plz help

        • BlueDevil Pro on October 21, 2015 at 11:39 am

          Javier-

          Thank you for asking about your Dodge Ram. Based on your description, it sounds like you may be losing water a little too quickly for the BlueDevil Head Gasket Sealer. In order to get the benefit of the product, the vehicle would need to be able to maintain idle for a full 50 minutes, without overheating or stalling out, and you shouldn’t be losing more than about a quart of coolant/water.

          Thank you!

          -BDP

  4. aeadhya sharma on June 19, 2015 at 2:21 am

    MY CAR COOLENT ARE leaked but i dont know why the coolent are lleaked
    the temprature meatre of the car are on above than a middle level

    please give me a suggetiuon whaaaaaaat can i do for this problem.

    • BlueDevil Pro on June 23, 2015 at 11:59 am

      Aeadhya-

      We recommend adding the proper amount of the BlueDevil Head Gasket Sealer to help stop the coolant leak you are experiencing.

      Feel free to contact our tech support team at 888-863-0426 for more information about the product and how it works.

      Thank You!

      -BDP

      • Mandy on November 29, 2016 at 5:02 pm

        I HAVE A 2006 CROWNVIC AND I TRIED ADDING BARS LEAK TO MY RADIATOR FLUID BECAUSE I THINK MY HEATER CORE IS GOING OUT BECAUSE I HAVE STEAM COMING FROM MY HEAT VENTS IN CAR CAN I STILL USE Blue Devil if I already added something?

        • BlueDevil Pro on November 30, 2016 at 10:47 am

          Mandy-

          Thank you for asking about your Ford Crown Victoria. Based on your description, we recommend flushing the cooling system thoroughly with a radiator flush http://store.gobdp.com/radiator-flush-00204/ prior to adding BlueDevil. Not knowing the chemical formulation of the previous product used, we would not recommend mixing the two. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

          • Nakita on January 28, 2017 at 7:29 am

            I was told that i have aradiator leak by a mechanic. My antifreeze leaks out overnight and heat wasnt working would blow cold.. Does this work for radiator leaks



          • BlueDevil Pro on January 30, 2017 at 10:20 am

            Nakita-

            As long as your vehicle will maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



  5. kendra abrego on June 24, 2015 at 2:59 am

    Juat got home n i heard a bubbling sound when I got off to check my car (06’dodge status)I noticed my car was leaking coolant n a lot..I had just filled it the day before..what do you think it could be,please help!

    • kendra abrego on June 24, 2015 at 3:01 am

      & I just replaced the thermostat a few days ago

    • BlueDevil Pro on June 24, 2015 at 9:41 am

      Kendra-

      Please contact our tech support at 888-863-0426 (8:00 AM – 5:00 PM EST, Mon – Fri) so that we may gather a little more information about the symptoms you are experiencing. After getting a little more information we will be able to recommend some possible solutions to repair your Dodge.

      Thank You!

      -BDP

  6. Robert on June 26, 2015 at 3:02 am

    I have a leak coming from where the coolant hose meets the overflow/resivore container. Will your product work in fixing this issue

    • BlueDevil Pro on June 26, 2015 at 2:08 pm

      Robert-

      Unfortunately, the BlueDevil Head Gasket Sealer really isn’t intended for that type of leak. We recommend having the coolant line, that is leaking, replaced.

      Thank You!

      -BDP

  7. Kelly on June 28, 2015 at 4:03 am

    I noticed my temperature gauge is going all the way to the red and the red temp light comes on. The car goes into “limp mode” not going over 35mph. I noticed alot white smoke coming from the exhaust one time only, but last night i put coolant in and it sounded like it was pouring out from below the car. Can this sealer help me?

    • BlueDevil Pro on July 7, 2015 at 7:47 pm

      Kelly,

      It does sound like you have a blown head gasket in your vehicle. Our most powerful head gasket sealer is available here: http://store.gobdp.com/head-gasket-sealer-38386/ and is guaranteed to seal your head gasket leak as long as you purchase BlueDevil Head Gasket Sealer from our online store or one of our authorized local auto parts stores listed here: https://gobdp.com/storelocator/. Make sure you follow the directions for BlueDevil Head Gasket Sealer exactly for the best results.

  8. Cindi on July 1, 2015 at 6:00 pm

    I just bought a used van and I have to pour water in it everyday. About a half gallon. The dealer tells me it’s normal to be low and I know he is crazy. He had my van for 2 days and did nothing to it. Tells me nothing is wrong. I shouldn’t have to keep adding water to it if it’s fine. I know they did replace the head gasket on it before I bought it. Can you give me some advise? Thank you

    • BlueDevil Pro on July 8, 2015 at 12:33 pm

      Cindi,

      Your engine coolant will get low over a period of time mostly due to evaporation of water from your overflow tank but if you are adding water every day then you certainly have a leak somewhere. For a quick read on how to find a coolant leak, try reading our article about coolant leak locations here: https://gobdp.com/blog/can-fix-coolant-leak/. Hopefully this will help you figure out where you coolant is going so you can come up with a plan to repair the leak.

    • Anthony Wayne Reed on September 19, 2021 at 9:41 pm

      I drove my car on the highway and as soon as I got off the highway I noticed the engine temperature was way up almost at the red line I managed to drive it to the destination that I was going and when I got there and got out look up under the car do was fluid leaking out of it I went to AutoZone and put two gallons of water in it and managed to drive it back home now nothing is sleeping and it’s running right to temperature is staying within its range what caused this and how do I avoid this in the future

      • BlueDevil Pro on September 20, 2021 at 9:03 am

        Anthony-

        What kind of vehicle was it and how many miles are on it? Have you noticed any other symptoms? For the system to have been that low on water, there may be some loose hose connection or a fault somewhere in the system that is allowing the water to leak that quickly. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

        Thank you!

        -BDP

  9. Larissa on July 5, 2015 at 1:00 am

    My car keeps overheating pretty much every time I drive it. I put water in it and drove around. It got all the way into the red, I opened the hood and saw that it was leaking from the overflow hose. Even coolant doesn’t last long in it. Can you help?

    • BlueDevil Pro on July 8, 2015 at 10:18 am

      Larissa-

      I would first start by having that hose replaced. Once the hose is replaced you can re-evaluate as to whether or not the vehicle is still losing coolant. If the car has overheated multiple times it is possible that it may have blown a head gasket due to running under extreme heat.

      Thank You!

      -BDP

      • Annette McGrew on June 12, 2022 at 9:46 pm

        I have a 2009 chyrsler town and country. It does not overheat and the ac and heat works fine. I just replaced the coolant reservoir because I was told my old one had a hole in it but when the mechanic pulled the reservoir out it did not have a hole so obviously it was not the problem. I noticed a coolant leak under the left driver side, someone said it could be my water pump, a hose or my radiator. Will your product help my vehicle? Can you please email me.

        • BlueDevil Pro on June 13, 2022 at 9:15 am

          Annette-

          Thank you for asking about your Chrysler Town & Country. Unfortunately, we do not manufacture a product intended to stop leaking water pumps or a hose leak. Based on your description, it would be worth bringing the vehicle in for inspection asap. Fixing the issue while it is still minor can prevent a major issue from occurring down the road.

          Thank you!

          -BDP

  10. j williams on July 6, 2015 at 11:13 am

    My 2004 Chev impala has a leak in the cooling system. Mechanic found it when changing oil. It does not use alot of antifreeze and temp gage stays below the middle mark. All of a sudden the air conditioner stopped blowing cold air from vents. Air is cold and I can feel it blowing a little but it don’t blow out any harder when I turn blower up from off to high. Could this be because of leak mechanic told me about?

    • BlueDevil Pro on July 9, 2015 at 8:18 pm

      Thanks for your question about your Chevy Impala. It doesn’t sound like those two problems are related. As for the coolant leak, try BlueDevil Radiator and Block Sealer (available here: http://store.gobdp.com/radiator-block-sealer-00205/) to stop that leak to make sure your cooling system stays working properly and your engine stays safe.

      As for your air conditioning, it sounds like your problem is with the blower in your ventilation system rather than your air conditioning. The first thing you should check is your fuse for your blower motor. If the fuse for the blower is still good then you may have to replace the blower.

  11. rondlyn on July 11, 2015 at 5:44 pm

    Hello i have a question ive changed all my hoses because it kept over heating now its leaking the coolent where it looks like from under the water pump witch i just changed also ….what could be the problem and what can i do to close the leak .

    • BlueDevil Pro on July 15, 2015 at 7:17 pm

      Rondyln,

      Thanks for your question about your water leak. Without being able to see where the leak is coming from, it is difficult to tell. If you reused any of the old hose clamps while changing your hoses your first step should be to get new screw type clamps and use those on the ends of all of your hoses. It is possible that while you were changing the hoses you loosened the water pump so you can try BlueDevil Radiator and Block Sealer to try and seal a water pump leak. BlueDevil Radiator and Block Sealer is available here: http://store.gobdp.com/radiator-block-sealer-00205/.

  12. Melissa on July 15, 2015 at 7:04 pm

    I have a 2000 Jeep Grand Cherokee Laredo that is leaking coolant from the front right side…also there is water leaking from the front of the radiator. I went to Pep Boys and they sold me your head gasket sealer, but is this the right product to use for this problem? I also should mention that every day sometimes twice a day I have to refill the reservoir repeatedly. Please advise.

    • BlueDevil Pro on July 21, 2015 at 10:05 am

      Melissa-

      Yes, they recommended the correct product for your Jeep. The BlueDevil Head Gasket Sealer will seal the leak(s) so that you will no longer lose coolant. Feel free to contact our tech support team at 888-863-0426 with any questions.

      Thank You!

      -BDP

  13. Debra Green on July 16, 2015 at 11:16 pm

    My car never over heated but I was losing coolant I had to do this a couple of times even when It wasn’t being drove. But then about 2 weeks later after it just sat there I filled it up with water and turned the air on and then turned heater on for at least 10 minutes and I checked the water flow and it stayed full and never leaked at all I took it for a drive to try to get it hot but it never got hot and it never leaked 2 hours later I checked again still full and still no leaks. What is going on? and what could it have been? and should I go a head and drive it now?

    • BlueDevil Pro on July 21, 2015 at 10:37 am

      Debra-

      Yes, you can go ahead and drive it at this point. You may want to continue to check the coolant level regularly just in case. You should also always keep an eye on the engine temperature to ensure it is not rising above normal while being operated.

      Thank You!

      -BDP

  14. britt on July 24, 2015 at 1:45 pm

    SO MY A C will not blow out cool or cold at all. my sons grandpa tried to put refridgerant in the car and said it” spuewed” out and after it smelled funny. my heat works great but i dont know if they are connected in any way. is there anyway u can tell me what this possibly could be.

    • BlueDevil Pro on August 10, 2015 at 10:34 am

      Britt-

      The funny smell may also be an indication of a leak in the evaporator. If you can find that your system pressure is low you can add BlueDevil Red Angel AC Stop Leak (available here: http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) to seal the leak and get your system back to normal. If your system is over pressurized the only option is to have your system professionally evacuated and refilled with the proper amount of refrigerant.

      Thank You!

      -BDP

  15. Patrick on July 26, 2015 at 3:54 am

    I have a 1999 dodge neon, my problem is my coolent system builds to much pressure, I was told it was a bad head gasket that’s leaking exhaust fumes into my coolent system. Have you ever heard of this problem? And could your product help me? Thanks in advance.

    • BlueDevil Pro on July 28, 2015 at 9:16 am

      Patrick-

      Yes, we recommend using the BlueDevil Head Gasket Sealer.

      Because you may be getting combustion/exhaust gases blowing into the cooling system and creating pressure we have some additional steps to give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with a low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will sometimes notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly.

      Thanks!

      -BDP

  16. sarah on July 30, 2015 at 4:12 am

    My car overheated i let it sit and cool down then drove it about 10 miles and it was fine i then added water to the reservoir then drove about 20 miles and it was fine but after parked there was a small puddle under my car after about another 20 miles is overheated again and now there was smoke/steam. Please help

    • BlueDevil Pro on August 4, 2015 at 11:19 am

      Sarah-

      Please contact us at 888-863-0426 so that we can get a better idea on just how quickly you are losing coolant. This will help us make the best recommendation for getting your vehicle back on the road.

      Thank You!

      -BDP

  17. Donald on August 14, 2015 at 4:23 pm

    I have a 2002 jeep liberty and the heater core is leaking a clear oily substance. Which product of yours should I use?

    • BlueDevil Pro on August 21, 2015 at 1:02 pm

      Donald,

      Thanks for your question about your jeep Liberty. If you are sure the leak is from the heater core, we would recommend using BlueDevil Pour-N-Go (available here: http://store.gobdp.com/pour-n-go-head-gasket-sealer-00209/). The other thing you might consider is having your cooling system flushed and new coolant added. Your coolant may be clear, but shouldn’t be oily and flushing it and adding new coolant will help your cooling system function more efficiently.

  18. jalisa on August 16, 2015 at 10:45 pm

    My ford taurus is leaking coolant from under my car the man said it closer to the engine and trans witch he would have to remove in order to get to the problem will this product work

    • BlueDevil Pro on August 17, 2015 at 11:18 am

      Jalisa-

      Yes, we recommend adding 16 ounces of the BlueDevil Head Gasket Sealer to your Taurus. The product is specifically designed to stop coolant loss.

      Feel free to contact us at 888-863-0426 with any questions.

      Thank You!

      -BDP

  19. Kelly Smith on August 27, 2015 at 7:05 pm

    2009 mustang has coolant leaking. Find it puddled under car, under motor in passenger side. But not from radiator. Maybe near thermostat. I replaced that, but still leaks. Major puddles. Have to add coolant every day. Burning smell after driving even for a few minutes. Noticed some coolant on other side of engine too. How can I tell where it’s coming from for sure and what could it be ?? Help. Desperate to not pay for a diagnostic test.

    • BlueDevil Pro on September 11, 2015 at 12:00 pm

      Kelly-

      We recommend adding 16 ounces of the BlueDevil Head Gasket Sealer. This will help stop any coolant loss you are currently experiencing whether it is from the head gasket, a freeze plug, cracked block, radiator, or any other part of the cooling system.

      Feel free to contact us with any questions.

      Thank you!

      -BDP

  20. Dwayne on September 4, 2015 at 6:08 pm

    2003 F150 King Ranch 5.4. Smelled antifreeze after a short trip to store. It took a gallon of both water & antifreeze. 2 weeks later again same thing. This time let truck sit for a couple of days. It started leaking with out being start. I see engine to front left a small amount of antifreeze around some thing going into engine with a plug connected. Its also under some type of long metal tube going towards back top of engine. Is this a gasket leak & what product would be best to use?

    • BlueDevil Pro on September 19, 2015 at 10:57 am

      Dwayne,

      Thanks for your question about your 2003 F150. The leak you’re describing does sound either like an o-ring leak, or gasket leak. For this type of leak we would recommend using BlueDevil Radiator and Block Sealer (available here: http://store.gobdp.com/radiator-block-sealer-00205/). It will bond to all metals or plastics ensuring it will seal your leak in this location. Make sure to purchase BlueDevil Radiator and Block Sealer from the link above, or one of our partnering local auto parts stores to make sure you get our guarantee!

      Thanks again for your question,
      -BD Auto Pro

  21. Casidy on September 13, 2015 at 5:20 am

    Hi. I drive a 2009 Dodge Charger. Once early this year it ran hot so I took it to dealership. They installed a new water pump. The car was okay except it started slowly loosing coolant. Maybe once every 3000 miles I added coolant. Well lately it ran hot again and I pulled over added water. I drove 10 miles and every 10 min I had to pull over cause my car was running hot so i sat for 30 minutes for it to cool completely. After it cooled i drove it on home but noticed smoke coming from the hood when i got home but while driving the Hot-Cold gauge did not move pass the half mark so I thought it was fine. I allowed it to cool for an hour. Then tried to take my daughter to work while sitting in parking lot I turned it off so it wouldn’t run hot but after minutes tried to start it and it would not start. Sounded like it was flooding and loosing power. well after hour of waiting it cooled and I drove home about 15 minutes away and as I was getting closer home smoke started to come from the Hood and it was driving roughly. I started to hear a small rattling noise. I made it home shut it off. The next morning I went to check it. It was strong started right up. I added Bars Head gasket sealant and antifreeze to the Reservoir jug well I was able to see it’s problem. Fluid started to pour from the thermostat housing leaking over on engine causing smoke and fluid start leaking from underneath car on front side by Reservoir jug and leaking under car toward middle by engine. I guess thats by the thermostat and water pump area. The Reservoir jug is still full cause some was flowing back in the jug. I can still see the coolant and bars sealant in the jug. My concern is the coolant pouring from the thermostat housing, which appears to be cracked and underneath the car. I saw a midst smoke and appears to be condensation coming from the exhaust pipe then it stopped. I checked oil dip stick it’s normal appearance. Can you help me? Which of your product can I use even if the other sealant seems trapped in the Reservoir Jug? Do i drain the jug first before adding anything new? Thank you.

    • BlueDevil Pro on September 25, 2015 at 12:55 pm

      Casidy,

      Thanks for your question about your Dodge Charger. It sounds like your car over hearing on and off has caused a few things to crack, like your thermostat housing. It is possible that when your car overheated the first time and the water pump was replaced, the thermostat was damaged and has continued to cause overheating problems. Based on how quickly you saw leaks and how much coolant was coming out, we would actually recommend replacing the cracked components rather than using stop leak products. Cracks that big may not seal using a stop leak and will probably start to leak again soon after.

      Once the broken components are replaced we would recommend flushing your cooling system to remove any debris or old leak stop agents. You can use BlueDevil Radiator Flush (available here: http://store.gobdp.com/radiator-flush-00204/) to clean everything out.

      Thanks again for your question!
      -BD Auto Pro

  22. Casidy on September 13, 2015 at 2:00 pm

    PART 2–

    Sorry.. it was the coolant air bleeder with a crack in it not the thermostat housing….

  23. Susie on September 16, 2015 at 4:38 am

    I have a 2002 jeep grand Cherokee leaking coolant, looks like its underneath radiator ( leak is in front area) I am refilling coolant reservoir every other day. Will your product help with this coolant leak?

    • BlueDevil Pro on September 16, 2015 at 3:18 pm

      Susie-

      Yes, the BlueDevil Radiator and Block Sealer would be able to seal the leak you have described. As long as your vehicle can maintain an idle for 45 minutes, without overheating or stalling out, and your not losing more than about a quart of water/coolant in that 45 minutes, you would be a good candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  24. Jim on September 17, 2015 at 12:51 pm

    my daughter just bought a 1994 Honda Accord 4 cyl w/149300 miles, I brought it to shop to have a tune up and oil change and asked IF possible to check the timing belt. I then was told the water pump is leaking and being a Honda it isn’t really smart to change the pump only as the belt and it are pretty much together inside. The cost is $1010.00. I have driven the car. The temp gauge doesn’t go above the mid point even on the highway, though it was only driven for 45 minutes. And there is no evidence of antifreeze on the ground when I check. As a precaution, would it be doable to use your product?

    • BlueDevil Pro on September 18, 2015 at 1:55 pm

      Jim-

      The BlueDevil Head Gasket Sealer would not treat a leaking water pump. We would recommend having the water pump and timing belt replaced in this instance.

      Thank you!

      -BDP

  25. B on October 6, 2015 at 3:07 pm

    It’s kind of heard to explain. When the gas is being pumped (chevy Camaro) the tank is only excepting $8-10. It feels like there is pressure in there. Why is this? Thanks!

    • BlueDevil Pro on October 14, 2015 at 5:39 pm

      B,

      Thanks for your question about your Camaro. Your problem could be happening for a few different reasons. Right next to the tube you put the gas pump into should be a smaller tube that allows air to escape from the tank while you’re pumping gas. Make sure that tube is free of debris and clear to allow vapors out. If you cannot see that smaller tube or it appears blocked you may have to drop your gas tank and remove the entire filler tube assembly to figure out what is blocked causing the pressure to build up. You can also try waiting a minute or 2 with the gas cap off after the gas pump stops automatically and try filling again to see if the pressure is relieved over time.

      Thanks again for your question!
      -BD Auto Pro

  26. Kathie on October 7, 2015 at 11:22 pm

    I have a 1997 Dodge Caravan that I need to push for a couple more months:-) Earlier this summer car overheated for first time, towed to mechanic he replaced a couole of hoses and the thermostat…..said that eventually other hoses may leak……….its been overheating for a while………I add coolant to reverse 2X week and fill radiator with water almost everday. I called my mechanic and he recommended I get a new car……he wants to sell me one:-) Woukd any of your priducts work?

    • BlueDevil Pro on October 15, 2015 at 1:05 pm

      Kathie,

      Thanks for your question about your Dodge Caravan. It would help if you could locate the leak to know which of our products to use, but for a mystery leak we would recommend using BlueDevil Pour-N-Go Head Gasket Sealer as it should seal head gasket leaks as well as other leaks. It’s very easy to use and should seal your leak quickly and easily.

      Thanks again for your question!
      -BD Auto Pro

  27. Leon on October 8, 2015 at 8:27 pm

    Hi, I have a 03 mountaineer V 8 4.6… it’s leaking underneath the thermostat housing and along the side by the plugs. Wanted to replace the thermostat housing but it’s together with upper intake. What could I use to help stop the leak since filing it up every morning?

    • BlueDevil Pro on October 16, 2015 at 11:09 am

      Leon-

      Based on your description, we recommend using the BlueDevil Head Gasket Sealer (32 oz yellow label). As long as the vehicle is able to idle for 50 minutes without overheating or stalling out, and you are not losing more than about a quart of water/coolant in that 50 minutes, you should be able to get some good results from the product.

      Thank you!

      -BDP

  28. Kris on October 13, 2015 at 11:05 pm

    I just bought a 05 Chevy trailblazer a week ago. I live in Arizona, so it’s hot. We got the pull changed and fluids topped off two days ago. After driving it 15 miles to school this morning everything still was fine until 2 pm this afternoon when I was told my car was leaking. Sure enough a large puddle running down the parking lot starting at the front of the car near the serpentine belt. It was dripping deep from 3 places (so it looked) ruining horizontally. The resivor (where you normally add coolant) was bone dry. I added coolant (full large bottle) and you could see it leaking right a way ( I did over fill it) I drove it about 10 minutes and it overheated. 15 min later I went to put water in it and it was not leaking and the Reservoir was full so I drove it for 20 min home (during rush hour) never went above the middle line (how it’s been since we bought it) got it home a d still no leaking and still full!!! I’m at a loss. Maybe a product like yours way used before we bought it and it resealed again? Is it safe for me to use your product if another was used before?

    • BlueDevil Pro on October 23, 2015 at 10:39 am

      Kris,

      Thanks for your question about your Trailbazer. Intermittent problems like you’re having are difficult to track down, especially not knowing the history of the car. We would recommend driving it for a few more days and keeping extra coolant with you to see if you can learn any more about what is going on. It should be safe to use BlueDevil Pour-N-Go to try and seal your leak unless it is coming from a coolant hose, as our stop leak products are designed to seal gasket and seal leak, not hose leaks.

      Thanks again for your question!
      -BD Auto Pro

  29. Katie on October 19, 2015 at 11:06 pm

    I have a 2000 ford Taurus I noticed a small leak of antifreeze a few months ago been putting coolant n water in it here n there as needed its never overheated I was driving on the highway and it the gage read hot and proceeded to make a knocking sound after a minute it died so I pulled over for a second and then started it back up got to work quickly 8 hours later it wouldn’t start well my brother went to get it had to flip the fuel switch in the trunk n messed with a spark plug it made it home I drove it about a mile then had someone tell me I needed new spark plugs new Thermostat in radiator cap my brother switched out 3 spark plugs input 50/50 in the overflow mind you my car has never smoked since I’ve had it and after he Changed 3 spark plugs and put antifreeze in it it started smoking a lot of white smoke from the tailpipe now it is not smoking at all what is the problem

    • BlueDevil Pro on October 24, 2015 at 10:48 am

      Katie,

      Thanks for your question about your Ford Taurus. Based on your description of events and the white smoke, it sounds like you blew your head gasket when your car overheated. If your car is a V6 we would recommend using BlueDevil Pour-N-Go Head Gasket Sealer (available here: http://store.gobdp.com/head-gasket-sealer-38386/) to seal the leak and stop the white smoke. Once you’ve sealed your head gasket leak you can change all the spark plugs and your engine oil and you should be back to normal.

      Thanks again for your question!
      -BD Auto Pro

  30. Nate on October 25, 2015 at 7:13 pm

    On my intake manifold of my 2000 Saturn there is a water outlet and it is cracked and leaking a pretty heavy flow of coolant.

    • BlueDevil Pro on October 26, 2015 at 12:59 pm

      Nate-

      We would like to get a better idea about just how much water you are losing and how quickly. Please contact us at 888-863-0426 so that we may discuss your vehicle in more detail and whether or not BlueDevil would be a good solution for you.

      Thank you!

      -BDP

  31. RE on October 26, 2015 at 7:00 pm

    Wondering if your product will work on my issue. My Xterra 2004 will leak coolant near the driver side only when the car is cool. I park it in the garage and no coolant is leaking if I check in two hours but it will leak when I check in the morning. No burning smell but just a tiny puddle under the car.

    • BlueDevil Pro on October 28, 2015 at 1:15 pm

      RE-

      Based on your description, we would recommend using the BlueDevil Head Gasket Sealer. As long as you are not losing coolant/water too quickly and the vehicle is able to maintain an idle for 50 minutes, without overheating or stalling out, you should be able to see some good results.

      Thank you!

      -BDP

  32. Katie on October 31, 2015 at 3:33 am

    I have a 2000 Ford Taurus SE it has never overheated on me before on my way to work and overheated very quickly so I pulled over because it was making a knocking sound no smoke or nothing I started back up and quickly make it to my job the next day it wouldn’t start I had to wiggle spark plugs and push the fuel button in the trunk it drove fine I got home figured I needed new spark plugs new radiator cap and new thermostat so I bought new spark plugs change the three front ones as soon as I put antifreeze in it my car started smoking white smoke out of the tailpipe so I shut it off every since I change the three front spark plugs and put antifreezeIn it IT will not drive I was told that it was an intake manifold what should I do

    • Katie on October 31, 2015 at 3:36 am

      Do I need to take the thermostat off and pour Blue Devil in the radiator hose or what I’m a single mother expecting a baby in February please help

      • BlueDevil Pro on November 3, 2015 at 11:01 am

        Katie-

        You may use either Head Gasket Sealer. The “Pour N Go” (16 oz./white label) is a less concentrated formula that does not require the removal of the thermostat or a flush of the cooling system prior to use. Whereas the “Mechanic Approved” (32 oz./yellow label) requires both the removal of thermostat and a flush before applying the product; the 32 ounce is the more concentrated formula.

        The product with the yellow label will give you best overall results as long as you can remove the thermostat and flush the system prior to use. However, if the thermostat is difficult to remove or you would rather not then you can always use the “Pour N Go”. With the use of either product, be sure to follow the guidelines for the proper amount to use.

        Feel free to contact us with any questions at 888-863-0426.

        Thanks!

        -BDP

    • BlueDevil Pro on November 6, 2015 at 11:07 am

      Katie,

      Thanks for your question about your Ford Taurus. It is possible that you have an intake manifold gasket leak, but most often after overheating and getting white smoke from the tailpipe the problem is a blown head gasket. If you can get your car to idle, use BlueDevil Head Gasket Sealer (available here: http://store.gobdp.com/head-gasket-sealer-38386/) to seal the leak. You do have to remove the thermostat to increase the flow in your system so BlueDevil can work, then simply pour BlueDevil Head Gasket Sealer slowly in your radiator while your engine idles.

      Thanks again for your question!
      -BD Auto Pro

  33. Alicia on November 2, 2015 at 8:46 pm

    my 1992 Ford explorer sometimes leaks coolant from the overflow port located under the heater core. The radiator was recently flushed clean due to steam coming through the AC/heater vents when I didn’t have either on, and a friend suggested that the heater core could just be clogged up. And for awhile, it seemed to work. yet, today it released a lot of coolant. There is no indication that it is overheating, but I am still concerned about it leaking coolant. Is it possible that I put too much coolant after flushing it out, or is there a possible leak and what Blue Devil product would you recommend for sealing this leak? Thanks!

    • BlueDevil Pro on November 6, 2015 at 11:13 am

      Alicia,

      Thanks for your question about your Ford Explorer. The symptoms you’re describing are classic symptoms of a leaking heater core. As it is leaking, it’s is draining through your AC condensate drain or steaming through your vents. We would recommend using BlueDevil Head Gasket Sealer to seal the leak in your heater core.

      Thanks again for your question!

      -BDP

  34. Tyler on December 8, 2015 at 4:54 pm

    I have a 2000 Jeep Grand Cherokee Laredo. When it hasn’t been started it holds the coolant in the reseviour and the radiator well but once it starts and I drive on it for a couple miles it starts to overheat rapidly. I then have white steam coming from the front passenger side and a slight drop under the front of the radiator whenever I stop after driving for a few miles? I’m thinking it’s either a hose or the thermastat but I’m not sure..any suggestions?

    • BlueDevil Pro on December 21, 2015 at 12:06 pm

      Tyler,

      Thanks for your question about your Jeep. It sounds like you’ve got a coolant leak that only opens up once your system is under pressure. The problem could be that your thermostat isn’t open which would cause the overheating and the high system pressure which would cause the steam as well. We would recommend starting by changing your thermostat and moving on from there.

      Thanks again for your question!
      -BD Auto Pro

  35. Joshua Gospodarek on January 6, 2016 at 12:02 pm

    I have a leak in my heater core where there is antifreeze coming in the car. will this product work to stop the leak? Do you guys have a guarantee for this?

    • BlueDevil Pro on January 7, 2016 at 8:50 am

      Joshua-

      The best product to use to stop your heater core leak is BlueDevil Head Gasket Sealer. The product carries a 100% money back guarantee and carries a success rate of over 90%.

      Feel free to contact our tech support team at 888-863-0426 with any questions.

      Thank you!

      -BDP

  36. levar ward on February 12, 2016 at 8:00 pm

    I have a leak but i cant locate it coolant is leaking only when car is running after it heats up it smokes a little but no overheating when i look for the leak the smoke is coming from near the water pump

    • BlueDevil Pro on February 22, 2016 at 3:52 pm

      Levar-

      We recommend that you first confirm it is not the water pump itself that is leaking. If it turns out that it is the water pump then we recommend that it is replaced.

      If the leak is coming from some other part of the cooling system then we recommend using BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/).

      Thank you!

      -BDP

  37. Billy McCain on February 23, 2016 at 1:33 pm

    I have a 2004 Impala with a coolant leak.
    the leak is not in the radiator or the hoses that connect to it. Not in the heater core ,(not wet inside) nor the thermostat . Water pump is working fine but I can not see it well enough to see if it leaks.I would like to try anti leak additive if you would advise that. If so, what should I use? Thanking you in advance. p.s. I can see two freeze plugs and they are not leaking

    • BlueDevil Pro on February 24, 2016 at 8:49 am

      Billy-

      Thank you for asking about your Chevy Impala. Based on your description, we would recommend using the BlueDevil Head Gasket Sealer. The Head Gasket Sealer is intended to treat blown head gaskets, warped/cracked heads, leaking heater cores, leaking freeze plugs, as well as radiator and block leaks. As long as you are not losing water/coolant too quickly and the vehicle will maintain idle for a full 50 minutes, you would be a good candidate for the product.

      Thank you!

      -BDP

  38. S. Bracy on March 12, 2016 at 2:52 pm

    I have a 1992 GMC Sierra 1500 that is leaking coolant under the truck. I look for the leak and couldnt find it. Also when checking the coolant level in the truck it is still half way full which is strange if the coolant is leaking. I did try to drive it and the car starting smoking and wouldn’t start and then 15 minutes later it started again. Not sure if it is a bad radiator or what.

    • BlueDevil Pro on March 29, 2016 at 8:45 am

      S. Bracy-

      Thank you for asking about your GMC Sierra 1500. Based on your description, it is hard to diagnose where the leak is coming from exactly. Is the smoke coming from out of the exhaust pipe or under the hood? Please contact our technical support team at 888-863-0426 so that we can get a better understanding of the situation and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  39. Carol Ann on April 7, 2016 at 10:46 am

    I have a 1990 Honda accord. My car is leaking anti-freeze somewhere. There is no leak on the ground. As I have to add anti-freeze my overflow resourvior keeps filling up to the top. I did have my car check and was told that some white stuff had clogged my system up. I have in the pass used stop leak for the radiator. There is not any smell from the tailpipe. Taking the radiator cap off and watching the flow of the antifreeze shows the pump is working. I had the heater coil changed about 2 years ago. I have changed the radiator cap within the last month. I changed the thermostat with the last 7 months. What could be my problem?

    • BlueDevil Pro on April 13, 2016 at 6:58 pm

      Carol,

      Thanks for your question about your Honda Accord. You may consider starting your search by performing a cooling system flush to clean out the white stuff that may have clogged your system. Some stop leak products can leave residue which will lower the ability of your cooling system to keep your engine cool or clog small passages. A system flush should remove those deposits and get your cooling system back to normal. You can consider using BlueDevil Radiator Flush (available here: http://store.gobdp.com/radiator-flush-00204/).

      As far the coolant disappearing, if you never find evidence of a leak, it seems most likely that the leak only happens when your car is warm and the system is under pressure. If this is the case you may consider checking your radiator hoses, the radiator end tanks and the connections for your heater core. It would be best to check these things while your engine is running and warm, but be very careful not to burn yourself while inspecting for leaks if your engine is hot.

      Thanks again for your question!
      -BD Auto Pro

  40. Eli on May 5, 2016 at 11:50 am

    I have a tiny leak that seeps and settles only overnight, can I pour a small amount of the 16oz where the thermostat sits instead of the radiator because the leak is coming from the side of engine between idler pulley and engine block

    • BlueDevil Pro on May 5, 2016 at 12:26 pm

      Eli-

      The product needs to go directly into the radiator through the radiator cap. If you do not have direct access to the radiator, with the vehicle off and engine cold, you may disconnect the upper radiator hose, pour the product in through there, reconnect the hose and start the idle from that point. Please contact our technical support line at 888-863-0426 to ensure you are using the proper amount of the product.

      Thank you!

      -BDP

  41. Michael Mejia on May 23, 2016 at 6:09 pm

    Hello,

    About a month ago my truck(ford ranger 1998 3L 4×4) was over heating and the check engine light came on. I changed the spark plugs and wires, drained the antifreeze, replaced the thermostat and all was good for about a month or so. The other day the check engine light came on again, since I didn’t have money to fix it, I left it parked for a few days. When I started it, I drove around the block and a lot of white smoke came out of the exhaust pipe. Since then I have changed the oil, it came out milky brown. These sound like the symptoms of a head gasket problem with coolant leaking into the cylinders, but I do not know how bad it really is, should I use the head gasket sealer or save the money to replace the head gasket all together? Please Help. Thank you.

    Respectfully,

    Mike M.

    • BlueDevil Pro on May 25, 2016 at 9:25 am

      Mike-

      Thank you for asking about your Ford Ranger. Based on your description, we would recommend using the BlueDevil Head Gasket Sealer. As long as the vehicle can maintain idle for a full 50 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a good candidate for the product.
      It sounds like the vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil Head Gasket Sealer working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system; based on the cooling capacity of your Ford Ranger you will only need 16 ounces of BlueDevil.

      Thank you!

      -BDP

  42. Edgardo manjarrez on May 24, 2016 at 11:34 pm

    Would it be safe to add this sealant over the one I already added which is a different one it’s prestone but I didn’t like it, it didn’t stop the leak at all and Ive heard nothing g but good stuff about this product that’s why I’m asking?

    • BlueDevil Pro on May 25, 2016 at 9:19 am

      Edgardo-

      Based on your description, we recommend flushing the cooling system, with the use of a radiator flushing agent, before using the BlueDevil Head Gasket Sealer. Not knowing specifically what chemicals are being used in the other product, we would not advise mixing the two. You can use the BlueDevil Radiator Flush, found here: http://store.gobdp.com/radiator-flush-00204/ , to get the system back to a clean state. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  43. Bill on June 21, 2016 at 6:42 pm

    04/96 Ford Taurus 3.0 EFI V-6 145 hp (1FAFP52U3WD22xxxx). Stepson bought the car (alone) after a drive around the block. He’s not mechanical. Once home, filled w water, checking the fluids. Leak ~ 1 Qt a minute. Once under the car, see a steady stream out of starter motor, and from a place hard to see, there appears to be a 1″ diameter shaft, perhaps between the engine & transmission??? Seems also leaking there. No water in the oil. Appears to not overheat, temperature gauge midrange or less. (No long trips to risk a severe test. Just 5 easy miles.) I am not familiar w this V6 engine/trans unit. Visibility poor. Cannot fathom the leak. Help? :>) Thanks –

    • BlueDevil Pro on June 28, 2016 at 9:33 am

      Bill-

      Thank you for asking about your stepson’s Ford Taurus. Although it doesn’t seem like you have any of the symptoms of a blown head gasket, it sounds like you are losing water at a rapid rate. Unfortunately, it sounds like you are losing water a little too quickly for the BlueDevil Head Gasket Sealer to be effective. At this point, you may want to have the vehicle diagnosed by a certified ASE mechanic to give yourself a better idea of where the leak is actually coming from.

      Hope this helps!

      -BDP

  44. Adam Miller on June 22, 2016 at 5:48 am

    99 gmc sierra 5.3 . Sudden spike in temp today when stopped at light . Comes down when in motion. Replaced fan clutch immediately. Ran idle 1o min. Turned ac on started to spike. Added dexcool and equal amount of water. No smoke . No white in oil. Located leak while running on passenger side . Can’t seem to pinpoint. Water pump and thermostat replaced 3 yrs ago all hoses are intact and dry . Looks like some kind of transfer case or something. Not sure . Help

    • BD Auto Pro on June 28, 2016 at 9:42 pm

      Adam,

      It sounds like you’ve done almost everything we would suggesting with the overheating situation you’re describing. If your truck doesn’t have any electric fans, just the belt driven fan, and the fan and shroud are in good condition, then the only other thing we would recommend doing is performing a cooling system flush. It’s possible that debris and corrosion products have built up in your radiator or engine block reducing the cooling capacity of your cooling system. This would cause the overheating your describing as there is a large heat load on your engine at idle with the AC on. You can use BlueDevil Radiator Flush (available here: http://store.gobdp.com/radiator-flush-00204/) to flush your system and get things back to normal.

      Thanks again for your question!
      -BD Auto Pro

  45. Nikki on July 25, 2016 at 4:58 am

    I have a 2007 Toyota Yaris that is losing coolant at a pretty alarming rate. I can’t see exactly where it’s coming from, but I do know that it’s somewhere on the passengers side towards the front of the engine. Almost directly above the alternator. Do you have any idea what this could be? It overheated onve, but now I have to fill both the radiator and reserve before each trip to ensure it doesn’t overheat again. Also, the reserve and radiator seem to be completely empty after sitting still for a while. Thanks in advance.

    • BlueDevil Pro on July 26, 2016 at 10:48 am

      Nikki-

      Please contact our tech support line at 888-863-0426. We would like to speak with you so that we may get a better idea of just how quickly you are losing coolant and what your options may be for stopping the leak. We can be reach Monday – Friday, 8:00 AM – 5:00 PM EST.

      Thank you!

      -BDP

  46. Jerry on August 22, 2016 at 1:26 pm

    I have a 2000 Ford Taurus that has coolant appearing in the passenger seat foot well. On a 200 mile trip about 1/2 the coolant overflow tank is disappearing but only a small fraction of that is showing up in the foot well. I had the engine replaced in the last 1000 miles. Any ideas?

  47. kiersten on September 1, 2016 at 10:11 pm

    1997 saturn sl2 past 3 days i have had problems with my coolant it started by the temp gage going into the red and then i filled it with antifreeze and i got home and my coolant cap wasnt tight enough so all the anitfreeze was out so i filled it with water and let it run to see if i could see smoke and there was nothing coming out the next day i go to work not even a mile away and it started to go into the red part so when i got home i checked the coolant gasket and it was empty so i filled it with antifreeze this time and i went for a drive around the block and it was fine but when i went for a 30 min drive it started to do it again and every one stops me to tell me that they see something dripping under my car and i havent been using the air conditioning either

    • BlueDevil Pro on September 7, 2016 at 9:44 am

      Kiersten-

      Thank you for asking about your Saturn SL2. As long as the vehicle can maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the BlueDevil Head Gasket Sealer, http://store.gobdp.com/head-gasket-sealer-38386/. Feel free to contact us at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  48. blake hardy on October 3, 2016 at 2:24 pm

    Can I use this these blue devil products for leaks even if I don’t have a leak in pretty sure I dont have a leak would jst like to use this product blue devil pour N go to pour in my radiator just to be more positive and secure I jst want to knw if I don’t have a leak problem will this product be bad on my car to use bc I really want to use this?

    • BlueDevil Pro on October 4, 2016 at 9:45 am

      Blake-

      The BlueDevil Head Gasket Sealer should not be used as a preventative measure or preventative maintenance. It is only intended for water/coolant leaks. If you are not experiencing a leak, it would not be appropriate to use the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  49. Kurtis Rose on February 10, 2017 at 1:08 am

    Hello, I have a 98 winstar with a small intake gasket leak. I lose about 1/4 of reservoir coolant a week. Reservoir tank has trace oil in coolent but not vice versa..should I flush it before using your product? And do you recommend Blue Devil Gasket or Blue Devil Pour-n-Go?

    • BlueDevil Pro on February 10, 2017 at 10:24 am

      Kurtis-

      Thank you for asking about your Ford Windstar.   You may use either Head Gasket Sealer.  The “Pour N Go” (http://store.gobdp.com/pour-n-go-head-gasket-sealer-00209/) is a less concentrated formula that does not require the removal of the thermostat or a flush of the cooling system prior to use.  Whereas the “Mechanic Approved” (http://store.gobdp.com/head-gasket-sealer-38386/) requires both the removal of thermostat and a flush before applying the product; the 32 ounce is the more concentrated formula.
        The product with the yellow label will give you best overall results as long as you can remove the thermostat and flush the system prior to use.  However, if the thermostat is difficult to remove or you would rather not then you can always use the “Pour N Go”. 
      Unfortunately, we do not manufacture a product intended to stop oil getting into the radiator. A hard part repair may be your best option.

      Thank you!

      -BDP

  50. Kay S. Jang on February 27, 2017 at 9:39 pm

    My Honda Odyssey 2001 has never overheated so far, but coolant is dripping beneth of the car passenger side only when engine is running,
    in other words, no leaking when engine is off. Do you think Blue Devil Product is helpful ? If so, let me know the name of product.

    Thank you!

    • BlueDevil Pro on February 28, 2017 at 9:11 am

      Kay-

      Thank you for asking about your Honda Odyssey. Based on your description, we recommend using the BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/). As long as the vehicle will maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the product.

      Thank you!

      -BDP

  51. Jordan on March 5, 2017 at 5:27 pm

    I think My Holden Astra 2000 is leaking coolant from the heater core, every day I find coolant underneath my vehicle on the passenger side.
    When I pour new coolant or water in the coolant tank, it immediately goes through it and doesn’t fill the tank. I can drive with it for now as long as it doesn’t overheat again.

    Can I use the BlueDevil Pour-N-Go to fix this?

  52. Tina Groves on March 25, 2017 at 5:56 am

    Last Sunday I had my cooling system flushed & my radiator replaced. Now there appears to be fluid leaking/dripping under my 2000 Ford Escort ZX2. It is on the passenger side near the front to middle of the engine but I can’t say exactly where it is coming from. There is also water dripping from my exhaust pipe but no smoke. There is no overheating & both my air/heat seem to be working fine. The mechanic says the fluid leak/drip is normal? Would one of your products be beneficial to me?

    • BlueDevil Pro on March 27, 2017 at 10:38 am

      Tina-

      Thank you for asking about your Ford Escort. Are you noticing a loss of water/coolant from the cooling system? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  53. Anthony on May 19, 2017 at 2:01 pm

    Im leaking antifreeze from the radiator but seem to be coming from a previous weld anything i can use or apply to fix it

    • BlueDevil Pro on May 19, 2017 at 3:03 pm

      Anthony-

      Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  54. Gene Hechler on June 14, 2017 at 1:37 pm

    I have a 2009 Lexus GX470. A mechanic said there is a build up where the aluminum radiator connects to the plastic radiator tank (not the overflow). He says they have two types of tanks. He wants to replace the radiator.
    Will your product fix this type of seepage?

    Thanks

    • BlueDevil Pro on June 14, 2017 at 2:45 pm

      Gene-

      Thank you for asking about your Lexus GX470. Based on your description, we recommend using the BlueDevil Radiator & Block Sealer (http://store.gobdp.com/oil-stop-leak-49499/). Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  55. KTB on July 25, 2017 at 6:49 pm

    where do I pour the blue devil head gasket sealer at? I have a ’08 Saturn Astra, and I may have coolant leaking. But IDK where to pour the blue devil product at.

    • BlueDevil Pro on July 26, 2017 at 8:56 am

      KTB-

      You would add the BlueDevil Head Gasket Sealer in through the radiator cap. If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring it through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there (it may be added into the hose or through the opening). Once it has been added reconnect the hose and start the idle from that point.

      Thank you!

      -BDP

  56. JA on July 31, 2017 at 11:10 am

    I have a 2011 Enclave with a leak in the A/C line running to the rear of the vehicle. I located the leak around the middle of the vehicle and it’s slowly leaking coolant but I don’t see any hole (the leak is in one of the aluminum pipes). Will this product work to repair this type of leak?

    • BlueDevil Pro on August 1, 2017 at 3:09 pm

      JA-

      Thank you for asking about your Buick Enclave. Are you losing coolant or refrigerant? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  57. Trevor Cooper on October 16, 2017 at 6:08 am

    2002 chevy impala 3.4
    I noticed a few months ago lower intake gasket was leaking now my low coolant light started coming on. What should i use and what method should i use to fix this lower intake gasket. Thanks

    • BlueDevil Pro on October 16, 2017 at 10:13 am

      Trevor-

      Thank you for asking about your Chevy Impala. Based on your description, we recommend using the BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/). Per the directions, you will be removing the thermostat and flushing the cooling system prior to using the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  58. Davrick Jacobs on April 9, 2018 at 10:07 pm

    I have a 1998 ford explorer do i have to wait until my coolant is gone out the radiator to add your product?

    • BlueDevil Pro on April 10, 2018 at 8:40 am

      Davrick-

      Thank you for asking about your Ford Explorer. Your cooling system should be almost at capacity, leaving just enough room for the recommended amount of the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  59. Ash on April 14, 2018 at 10:45 pm

    Hello, i have a 2006 Audi A4, 2.0T
    I have a coolant leak. Looks like it seems to be leaking out under the hood of the passenger side and not the drivers side.
    The temperature gauge won’t even show me if the car is getting hot, it will just stay in the middle. Before the coolant would leak a little and i would have to buy coolant every other week but now it seems to be draining out every day.
    There is no water where you normally put oil in but i was getting oil in the radiator tank, started out as a lot of oil in there to very little drops. Do you happen to know the cause of it and how i could get it fixed?

    • BlueDevil Pro on April 16, 2018 at 8:54 am

      Ash-

      Thank you for asking about your Audi A4. From the sounds of it, you may be losing coolant a little too quickly for the BlueDevil Head Gasket Sealer to be successful. Unfortunately, we do not manufacture a product intended to stop oil from getting into the radiator. Based on your description, we recommend taking the vehicle into a certified ASE mechanic for a proper diagnosis and possible hard part repair.

      Thank you!

      -BDP

  60. Cody on April 19, 2018 at 8:02 pm

    My ford f150 has some kind of leak that makes the airconditioner smell like chemicals (antifreeze maybe) also the air vents have a mild steam and some kind of liquid (water?) puddles around the vents after awhile. (my dad says its the heater core but the floorboard in the passenger side does not get wet).

    Do you know what this is? And… do y’all have anything to fix it?

    • BlueDevil Pro on April 20, 2018 at 8:33 am

      Cody-

      Thank you for asking about your Ford F-150. Are you having an issue with getting heat? Are you losing antifreeze from the cooling system, or refrigerant from the a/c system? Please contact our technical support line at 888-863-0426 so that we may get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  61. Tony on April 21, 2018 at 7:28 pm

    I’m loosing antifreeze in the front driver side of my Mercury marainer. It’s over heating as well, could this be a bad radiator? The plug is fine, didnt see any problems with the hoses? Help please!

    • BlueDevil Pro on April 23, 2018 at 9:12 am

      Tony-

      Thank you for asking about your Mercury Mariner. How quickly are you losing antifreeze? If the leak is not more than a seep or a light drip, we recommend using the BlueDevil Radiator & Block Sealer for a radiator leak. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  62. Stan Williams on June 21, 2018 at 4:54 pm

    will this work on 08 bmw?

    • BlueDevil Pro on June 25, 2018 at 1:02 pm

      Stan-

      Yes, BlueDevil Pour N Go Head Gasket Sealer is safe and compatible to use in your ’08 BMW.

      Feel free to contact our tech support team at 888-863-0426 with any further questions.

      Thank you!

      -BDP

  63. Ted on July 14, 2018 at 8:07 pm

    I have a slow leak at water pump of 2008 honda odyssey van. Will any blue devil product help?

    • BlueDevil Pro on July 16, 2018 at 8:22 am

      Ted-

      Unfortunately we do not manufacture any products that are designed to seal a leaking water pump. Your best bet would be to have the pump replaced.

      Thank you!

      -BDP

  64. Michele on November 28, 2018 at 11:29 pm

    Found 2 puddles of antifreeze in my driveway. I’ve been told by 3 different garages I have a water pump leak (replaced 50K miles ago/3 years ago); radiator leak located at the top of the radiator (original radiator – 2006 Jeep Liberty 3.7L) and the 3rd garage guy told me I have both a water pump leak and radiator leak – who to believe? The Heater Core was just replaced Oct. 2018 due to no heat. No overheating at this time nor lights coming on. Would the Blue Devil product help with this problem or can I still drive the SUV and keep an eye on the coolant and potential puddles that may be found under the car? Please advise. Thank you

    • BlueDevil Pro on November 29, 2018 at 9:19 am

      Michele-

      Unfortunately, we do not manufacture a product intended to stop water pump leaks. The water pump would need to be replaced prior to using a BlueDevil product to seal your leaking radiator. How quickly are you losing antifreeze? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  65. Brian Handle on January 18, 2019 at 3:57 am

    Will it fix coolant leaks from worn valve guides on a 1985 dodge 360 hard to start but runs normal after starting whit smoke out the exhaust and intake manifold or is it just a bad head gasket I had it for a year with interest in restoring it but if this product will work to salve the problem I can go back to the hay field with it will it help

    • BlueDevil Pro on January 18, 2019 at 10:15 am

      Brian-

      Unfortunately, white smoke from the exhaust pipe would be a tell-tale sign of a blown head gasket. You mentioned it was hard to start. Are you getting water/coolant back into the cylinders? Have you checked the spark plugs to ensure none are fouled out or deteriorated. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  66. Colbert on February 16, 2019 at 1:08 am

    I hitted another car so that the cooler start leaking at that time is a small hole at the side of a cooler

    • BlueDevil Pro on February 18, 2019 at 8:52 am

      Colbert-

      How quickly are you losing coolant? Is the vehicle overheating at all? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  67. Jim on April 4, 2019 at 12:17 pm

    Any problems adding this to a 2000 Posche Boxster? Have a tiny leak on the Head Seal. Have to add to reservoir as there is no access to inject otherwise. I think the reservoir is active and part of the circulation. Any issues with the aluminum components of the engine?

    • BlueDevil Pro on April 4, 2019 at 4:04 pm

      Jim-

      The BlueDevil Head Gasket Sealer is safe and compatible to use on your Porsche Boxster. If your vehicle only has a reservoir/expansion tank rather than a radiator cap, instead of pouring BlueDevil through the reservoir/expansion tank, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the reservoir. It may be added into the hose or the opening on the radiator. Once BlueDevil has been added, reconnect the hose and start the idle from that point.

      Thank you!

      -BDP

  68. Tre on April 10, 2019 at 9:22 am

    I have a Jeep Grand Cherokee 2003 an it’s leaking water an coolant an it look like its coming from the left hand side.. I don’t know if it’s bc of the holes or the radiator

    • BlueDevil Pro on April 10, 2019 at 9:41 am

      Tre-

      Thank you for asking about your Jeep Grand Cherokee. How quickly are you losing water/coolant? Is the vehicle overheating at all? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  69. Julie on May 18, 2019 at 8:22 pm

    One of the most informative and clear page and answers I have seen. I will be reading the whole thing. Thank you so much Blue Devil!

  70. Real on December 9, 2019 at 10:10 am

    My VW/EOS/2012 is leaking but i dont know exactly where (roughfly 250 Ml./500 Km)
    I dont have any over-heating.
    Does your BlueDevil Pour-N-go will stop the leak of alu.radiator,or (and)head gasket?

    • BlueDevil Pro on December 9, 2019 at 11:09 am

      Real-

      Yes, the BlueDevil Pour-N-Go Head Gasket Sealer would treat leaking head gaskets and/or radiator. It is safe and compatible to use on aluminum. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  71. Paul Richard's on July 14, 2020 at 1:45 am

    Does your product fix a leak in the plastic expantion cooling tank.

    • BlueDevil Pro on July 15, 2020 at 9:23 am

      Paul-

      Yes, the BlueDevil Head Gasket Sealer is able to seal leaks from plastic components, as well. What kind of vehicle is it? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  72. virginia marron on July 19, 2020 at 9:32 pm

    I have a 57 chevy and was told that i have coolant leak from heater core and to fix they would have to remove the dash to get to the heaper
    core and i use { blue devil} and where do i put it and how much should i use.

    • BlueDevil Pro on July 20, 2020 at 9:57 am

      Virginia-

      Thank you for asking about your Chevy. Yes, the BlueDevil Head Gasket Sealer would be able to treat a heater core leak. You will add the product directly into the radiator through the radiator cap. On the back of the bottle, there is a cooling system capacity table that will show you how much of the product to use. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  73. Jin on July 26, 2020 at 12:25 am

    Has Blue Devil tested their products on flat-4 Subaru engines? I have a leaking head gasket and I’ve tried a number of these leak-sealers. None of them work

    • BlueDevil Pro on July 27, 2020 at 8:34 am

      Jin-

      What are the symptoms the vehicle is having? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  74. Tawanda on August 3, 2020 at 9:59 am

    My vw golf 4 is leaking coolant from the radiator everytime I turn it on and gradually stops leaking when I turn it off. The radiator has a plastic tank on one side and a bronze one on the side with the electric connections which is the side leaking. Why is it leaking only when on and do you products which can fix bronze and are your products available in Africa

    • BlueDevil Pro on August 3, 2020 at 10:40 am

      Tawanda-

      Thank you for asking about your Volkswagen Golf. Most coolant leaks don’t appear until the engine is running, typically. If the leak was coming from a hose or a loose hose connection, coolant wouldn’t be flowing through the hoses until the vehicle was on and running. Based on your description, you may want to have the vehicle inspected to see if they can pinpoint where the leak is coming from.

      Hope this helps!

      -BDP

  75. Natasha marie Shallow on August 9, 2020 at 12:30 pm

    Hi i have a ford fiesta Flame 04 plate
    My car started steaming noticed it was running low on coolant
    I bought some and filled it up and as soon as i turn the engine on it starts to leak out but oy once I start engine

    • BlueDevil Pro on August 10, 2020 at 1:29 pm

      Natasha-

      Thank you for asking about your Ford Fiesta Flame. How quickly are you losing coolant? Are you able to see where coolant leak is coming from? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  76. Dan Collins on August 31, 2020 at 2:05 pm

    I’ve noticed that my coolant is getting low every time I check it. Although i never experienced any problems yet but I am worried if one day my car would fail.

    • BlueDevil Pro on September 1, 2020 at 8:45 am

      Dan-

      How quickly are you losing coolant? You mentioned not noticing any problems yet, is the low coolant indicator coming on or the temperature gauge reading a little higher than normal? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  77. Dave on December 24, 2020 at 12:18 am

    I have an 06 Toyota Corolla. It started to over heat about a year and a half ago and I found my coolant was low. I had to add about 2 quarts. I never saw a leak and the car ran fine. About 8 months ago it did the same thing. I added the coolant and it has been fine till yesterday with the same thing. I added about 2 quarts or so and it is running fine now. I never see a leak. Is this a head gasket?

    • BlueDevil Pro on December 28, 2020 at 9:08 am

      Dave-

      Thank you for asking about your Toyota Corolla. The tell tale signs of a blown head gasket are water/coolant mixing with the engine oil and/or white smoke coming out of the exhaust pipe. If you are not seeing that, it would be tough to say if it’s head gasket related. It may be worth taking the vehicle to a certified ASE mechanic for a proper diagnosis. It sounds like you may have a small pinhole leak, as the vehicle makes it a pretty long time before it starts to overheat.

      Thank you!

      -BDP

  78. Jennifer on December 31, 2020 at 12:56 am

    Hello, I drive a 2004 Ford Escape and notice that I am needing to add radiator fluid way more often than necessary. My husbands thinks I may have a leak but he is not sure. I often check underneath for leaks but never notice any. We have to add fluid every 2 or 3x a year. Surely this isn’t normal, right? What should we do?

    • BlueDevil Pro on December 31, 2020 at 9:02 am

      Jennifer-

      Thank you for asking about your Ford Escape. Is the vehicle overheating at all? Have you noticed any other symptoms other than adding coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  79. sara on January 21, 2021 at 7:59 pm

    Hello. I have a 2004 Lexus RX 330. A couple of days ago my car heated up into the red and i noticed i had no coolant in my car. i filled it up and it was fine. today, i checked it and it was completely empty again. there are no leaks on the ground or anything like that

    • BlueDevil Pro on January 22, 2021 at 8:31 am

      Sara-

      Thank you for asking about your Lexus. Have you checked the oil to see if water/coolant is leaking in? Have you noticed a white smoke/steam coming out of the exhaust pipe? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  80. Natasha Morlock on August 15, 2021 at 6:36 am

    I have a 1999 Honda Accord that has a small leak around the O-ring on the flow tube do you think I can use Blue Devil

    • BlueDevil Pro on August 16, 2021 at 8:29 am

      Natasha-

      Thank you for asking about your Honda Accord. Unfortunately, the BlueDevil Head Gasket Sealer would not be intended to treat a rubber O-ring. Replacing the O-ring on the flow tube would be your best option.

      Thank you!

      -BDP

  81. Ryan Funaro on May 26, 2022 at 2:00 am

    i have a 2002 Mitsubishi Galant 2.4 l engine and I’m losing coolant. no visible leaks, no overheating. i noticed the leak a 18months ago when i checked the radiator because the car was running hotter then normal but still not overheating. it was low. i added half a gal at that time. since then I add 5-10oz every 3-4 months. I’ve changed water pump and gaskets, upper and lower hoses. I can sometimes smell coolant while I’m driving.

    • BlueDevil Pro on May 26, 2022 at 8:42 am

      Ryan-

      Thank you for asking about your Mitsubishi Galant. Have you noticed any bubbling/boiling in the radiator? Although it seems like a very small leak, there must be some evidence of where the coolant is going. You can try using a block-dye test to check for combustion/exhaust gases pumping into the cooling system. If you are still unsure as to where the leak is coming from, it may be worth bringing the vehicle to a certified ASE mechanic for a proper diagnosis.

      Thank you!

      -BDP

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