Coolant is Leaking from My Car!!

Coolant LeakIt’s just like the movies.  One minute you’re driving down the road thinking about your next appointment, or maybe where you would like to go for lunch.  Your car has never let you down, so why would you think it would today?  Then you start noticing some white smoke coming from under your hood.  The first thing you do is check your vehicle’s temperature gauge to see if your car is overheating and honestly can’t remember where the needle usually points.  You’re driving fast so it doesn’t look like much smoke, but you find a safe place to pull over anyhow.  You manage to get your hood open without burning yourself only to be greeted with a cloud of sweet smelling steam.  Now you are wishing you packed your lunch and hoping your next appointment wont think less of you because you drive an unreliable car.

The reality is you can’t always predict or prevent a cooling system failure, but there are a few things you can do to increase your chances of making it safely to your next appointment without buying a brand new car every few months.

The first thing you can do is check your cooling equipment for problems.  Start first with the radiator.  Will be at the front of your vehicle usually made out of aluminum and silver, but in older cars can be made of brass or copper and painted black.  On the radiator you can check for cracks in the end tanks or hose connections and damage on the fins.

Car is Leaking Coolant
Cracked Hose Connection
Car Leaking Coolant
Damaged Fins

Cracks in the end tanks or hose connections are an indication of imminent failure and should be addressed immediately most likely by replacing the radiator. Damaged fins not only decrease the radiator’s cooling efficiency but are an indication of a possible future leak.


Car leaking Coolant
Cracked Hose

Next, check the upper and lower radiator hoses.  These will likely be the largest hoses on your engine.  One will run from the bottom of the radiator to the motor near the water pump and the other will run from the top or front of the engine to the top of the radiator.  Check both ends of these hoses for cracking, tears or swelling and replace if needed.  Also, check your water pump if it is accessible for evidence of leaks where it bolts to the block.



Feeze Plug Leaking Coolant
Leaking Freeze Plug

Next, if it is accessible check the freeze plugs for leaks.  The plugs will be on either side of the engine block and are metal disks from 1.5 to 2.5 inches in diameter.  There will be between 2 and 4 freeze plugs, usually in a row on each side of the engine block.  Check each of these plugs for evidence of coolant leakage.  Checking your heater core can be difficult because it is usually far up under your dashboard and inaccessible.  If the heater core is leaking you will have coolant inside your vehicle likely on the passenger or driver floor pan, or have a sweet smell when you turn your blower on.  Lastly check the heater core hoses for cracks, bulges or tear.  You can also check around your head gasket for evidence of a leak, usually under your exhaust manifold.

Cool System Checks:

  • Radiator: damaged fins, cracked end tanks or hose connections
  • Radiator Hoses: Cracks, rips or bulges at ends
  • Water Pump: leaks at the gasket, shaft play
  • Freeze Plugs: cracks, leaks
  • Heater core: leaks into passenger compartment
  • Heat Care Hoses: cracks, tears or bulges at ends
  • Head Gasket: external leaks below the head

Checking all of these components regularly can help you catch a cooling system failure before it leaves you stranded.  If you’ve discovered cooling system hoses with problems, you should replace the defective hose.  If you discover a leak in your radiator, heater core, freeze plug or head gasket you can solve the problem quickly and easily by using BlueDevil Pour-N-Go.  Simply add the 16oz bottle to the radiator of your 4 or 6 cylinder vehicle and the leak will be sealed as you drive.   You can even add BlueDevil Pour-N-Go to your cooling system before a leak forms!  BlueDevil Pour-N-Go will not prevent cooling system leaks but will seal them as they occur.

BlueDevil Pour-N-Go Head Gasket Sealer

Use BlueDevil Pour-N-Go on all of your cooling system leaks because it is guaranteed!  You can purchase BlueDevil products at any of our retail partners: NAPA, O’Reilly Auto Parts, Advanced Auto, Bennett Auto Supply, Prime Automotive, CarQuest Auto Parts, PepBoys and AutoZone.  You can also purchase BlueDevil Pour-N-Go here: Pour N Go Head Gasket Sealer

Pictures provided by,,, and

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41 responses to “Coolant is Leaking from My Car!!

    1. Arthur-

      Yes, it is possible for the head gasket to be leaking under the hood but, it is hard to say definitively without more information. Feel free to contact our technical support line at 888-863-0426 with any questions.

      Thank you!


  1. Hey I had my car turned off and I put coolant into the car as soon as I started to fill it up I started hearing a leak. Is that just my coolant resevoir and is there an easy fix for that?

    1. Chase-

      Based on your description, it is hard to say where exactly the leak is coming from. Unfortunately, if you are losing coolant that quickly, we would not recommend using the products in this case.

      Thank you!


  2. I have a very small coolant leak on my car. I cant find any cracked hoses, cracks in the radiator or anything. My coolant level was low also. I did notice coolant running down the rad itself and also on other components of the engine bay. Its boggling to me. What do i do? Thank u in advance

    1. Keith-

      Based on your description, we would recommend using the BlueDevil Head Gasket Sealer for your cooling system leak. It doesn’t sound like you are losing coolant too quickly and as long as the vehicle can idle for the full 50 minutes, without overheating, the product should be able to seal your leak.

      Thank you!


  3. My car is leaking from where my bumper is, I can’t drive 20 minutes without my needle going up to the H and smoke coming out my hood. When I stop there’s antifreeze leaking from where my bumper is dripping down. I can’t tell where the leak is coming from. Any idea wher the leak might be?

    1. Julie-

      Please contact us at 888-863-0426 so that we can get a better understanding as to where exactly you are seeing the coolant leak. We would be happy to help you in figuring out what may be going on and whether or not any of the BlueDevil Products may be a good solution for your vehicle.



    1. Rena,

      It sounds like you’ve possibly got a blown head gasket. often times quick overheating can cause head gasket leaks and a loss of power. Before using BlueDevil Pour-N-Go or Head Gasket Sealer it would be best to confirm you have a blown head gasket. Try reading this article: about the other symptoms of a blown head gasket to see if that might be your problem.

      Thanks again for your question!
      -BD Auto Pro

  4. My car are 2002 IMPALA and my radiator are leaking from the front of my car and its leaking antifreeze on to the drown from driver side in front of my car but my car wasn’t running over heated it was running under hearted and my car still starts up with no problem and yes I smells the antifreeze I even looked under my car I saw it run out the bottom of my radiator can you help me understand what’s wrong with my car or bluedevil help seal were antifreeze won’t come out bottom radiator as I’m driving and isn’t it bad to drive your car that way@queen looking for answers please and thanks

    1. Selena-

      As long as the vehicle will not lose more than about 1 quart of antifreeze/water during a 50 minute idle then there is a very good chance the BlueDevil Head Gasket Sealer will be able to seal it. We recommend adding 16 ounces of BlueDevil Head Gasket Sealer ( to your cooling system.

      Feel free to contact us at 888-863-0426 if you run into any questions.

      Thank you!


  5. We have a 6 cyl 2002 Jeep Liberty. Today we noticed a small drip under the motor and checked. It is most definitely coolant and may be coming from the water pump. Is this leak one that could be repaired using your products.

  6. I have a 2002 Chevy Monte Carlo and just had the therm replaced. Now my car is overheating quickly, smoking from under the hood, and it always says low coolant. If I run my ac when I turn the car off , majority of the antifreeze runs out from under the driver side. U think a bdp will help me?

    1. Sabrina-

      Thank you for asking about your Chevy Monte Carlo. In order to get the benefit of using the BlueDevil Head Gasket Sealer, the vehicle would need to be able to maintain idle for a full 50 minutes and you should not be losing more than about a quart of water/coolant during that 50 minutes. Based on your description, unfortunately, it sounds like your leak may be a little more extreme than what the product is intended for.

      Thank you!


    1. Jesse-

      Please contact our technical support line at 888-863-0426 so that we can get a better idea of the issues your Acura is having and be able to make any appropriate recommendations.

      Thank you!


  7. I have a 2003 Nissan Altima that I just notice some leakage a day ago now I think it’s starting to over heat witch have the my car cutting off do you know what can be the problem

    1. Kimberly,

      Thanks for your question about your Nissan Altima. It’s important to keep your car from overheating as that can cause a lot of further damage. Until you get the problem fixed, make sure you keep your coolant topped off to keep your car running safely. The first step to permanently fixing the problem is to locate the source of the leak. You can try adding UV dye to your coolant and using a black light to find the source of the leak. you can also clean your engine bay very well, then allow your car to idle while you search for the leak to start.

      Once you’ve found the leak you can replace the leaking component or use the appropriate BlueDevil leak stop agent for the leaking component.

      Thanks again for your question!
      -BD Auto Pro

    1. Brian-

      Yes, it does sound like the hose has been disconnected. It could possibly be the bottom radiator hose, so you would want to re-attach the hose and refill the system with coolant to the proper level.

      Thank you!


  8. I had 3 freeze plugs changed on my 03 town and country but I have been seeing anti freeze a little on the ground in my drive way and not until 2 days ago I seen a little smoke when I popped my hood..Should I use the product?

    1. Lakisha-

      Yes, if you are still losing coolant whether it be from a freeze plug, heater core, head gasket, or some other location within the cooling system we recommend applying 16 ounces of BlueDevil Head Gasket Sealer ( This product will permanently seal any leaks within the cooling system.

      The product may be purchased locally through many retail automotive parts stores such as AutoZone, Advance Auto Parts, O’Reilly Auto, NAPA, etc.

      Thank you!


  9. Car been overheating ,I put when was cooked off antifreeze ,today there’s antifreeze all under car ,driving down from under motor/container! How do I see if it’s a rip,broken,creaked hose

    1. Patty-

      You can check the hoses to make sure they are properly connected and that there are not tears along them. If it appears they are connected properly and free of any rips or tears, we recommend using the BlueDevil Head Gasket Sealer 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 product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!


  10. So my truck has been having cooling problems. What it will do it will run just fine till it gets warmed up and then it tries to overheat. It is guaranteed that it will overheat if the radiator cap is on but if the cap is off it won’t overheat but the temperature will sit higher, and when I try to top off the coolant it will sit at a decent level, then you can see a surge of coolant rise up followed by a ton of bubbles, then the coolant level will fall and the rise slowly again then repeat indefinitely, plus the heater only blows cold. Is this the beging of a head gasket leak or should I look for something else? Water pump is new, thermostat is new, radiator is new, fan works, and no external leaks.

    1. Justin,

      Based on your description it sounds like your cooling system has a very large clog in it almost completely stopping coolant flow, or your water pump is broken and not circulating coolant like it should. Having the radiator cap installed would raise pressure and make it even harder for coolant to flow which could explain that problem. A large clog in your heater core could stop coolant from circulating through it which would leave your head blowing cold and could be causing some of the overheating you are experiencing. Our recommendation would be to try using BlueDevil Radiator Flush (available here: and try to clean out your cooling system. Along with using BlueDevil Radiator Flush make sure to remove all the hoses and drain plugs and thoroughly flush your system with clean water to ensure any clogs or debris are removed.

      Thanks again for your question!
      -BD Auto Pro

  11. Every time I start my car, smoke comes out of the tail pipe for about 20 to 30 seconds then it changes to mist, similar to water vapor or steam. A minimal steam is continuous, even after the car reaches operating temperature. Furthermore, sporadically, the exhaust smells weird, like a bad sweet smell. This occurs in all seasons, winter, summer, etc.

    Any recommendations on fixing this issue with your product?

    P.S. I did not notice any loss of antifreeze because the car is parked – not being driven.

    Sporadically, smoke comes out of the tailpipe for about 20 to 30 seconds ONLY when I start the car with a COLD engine.

  12. My 2002 Town & Country is low on coolant when I get ready for work. I fill it up and drive about an hour to work. My temperature gauge never goes over the halfway point and sometimes I will see a little puff of white smoke from under the hood…but not always. When I get to work and park it always leaves a puddle under it particularly in the drivers side front…I usually have to add some coolant for my drive home, however it will start missing when I am idling at stoplights but only on my way home….it also seems worse when it is warmer…will one of your products help?

    1. Jess-

      Thank you for asking about your Chrysler Town & Country. Based on your description, you may be losing coolant a little too quickly for the product to be successful. In order to get the benefit of using the BlueDevil Head Gasket Sealer (, the vehicle would need to be able to idle for a full 50 minutes, without overheating or stalling out, and you shouldn’t be losing more than about a quart of water/coolant during that 50 minutes. From the sounds of it, you may not be able to keep the product in the system long enough in order to get the benefit of using it. A hard part repair may be your best option.

      Thank you!


    1. Arturo-

      Please contact us at 888-863-0426 so that we can discuss where specifically you are seeing the coolant loss from. This will help us recommend the best product for sealing the leak and stopping any future coolant loss.

      Thank you!


  13. I have a 2004 Cadillac cts and it said check coolant and I did it was low so I poured some in when I got back from driving it. It came out soon as I poured it in so I waited a couple hours and poured some more in it didn’t come out as fast as it did earlier but it didn’t run hot or anything so what u think it is.

    1. Tina-

      Thank you for asking about your Cadillac cts. 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!


  14. I had a very bad leak on my passenger side floor
    Noticing it heater core I used your product which slowed the leak tremendously. Yet I’m still seeing smoke and windshield is heating up. How should I proceed with repaires??

    1. Torrence-

      What was the product that you used? 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!


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