Signs of a Blown Head Gasket

signs of a blown head gasketOne of the best ways to figure out what is going on with your car is to know how it normally operates so you can tell when something has gone awry.  Most of the time while we’re driving we’re so distracted by the radio, the scenery or even worse our cell phones, that we can often overlook our vehicle’s cry for help.  Getting used to the way your car sounds, feels and looks normally can be the best way to help you detect the early symptoms of a problem so you can repair it before it leaves you stranded or does even more damage to your vehicle.

Every week or so, it would be a good idea to turn off your radio and really focus on the feedback your car is giving you.  You should start this exercise from the moment you jump in your vehicle, even before you start the engine.  Look for anything unusual around or under your car.  Are there any puddles or drips under your vehicle?  Are there any new scratches, dings or dents you don’t remember?  Is anything discolored, are your tires pudgy or getting cracked or have low tread depth?  Observing all these things can help you catch problems early.

Also, pay attention to when you start your engine.  Does it start easily?  Does it make any funny noises or smells?  Do any warning lights on your dash board stay on after the engine is running?  Lastly, during your drive listen for the same types of things.  Are there any clunks, rattles, whines, or grinding sounds?  If so when do they happen?  Does your car accelerate, brake and corner smoothly?  Keeping an eye on these types of things can help you make sure your car is in great shape and help you catch a warning sign early.

Some of the signs you may be looking for, especially if your car model is prone to blown head gaskets, or you happen to have a lot of miles on your car, are the sings of a blown head gasket.  Blown Head Gaskets can cause your vehicle to do some very strange things and give confusing symptoms, so we’ll list the symptoms here so you can identify your problem early.

Signs of a Blown Head Gasket:

  • White smoke from the tail pipe
  • Bubbles or exhaust gas in your radiator
  • Coolant flowing out of your coolant reservoir
  • White milky substance in your engine oil or around your oil cap
  • Loss of power
  • Overheating engine
  • Coolant leak from between your engine block and cylinder head

Your head gasket serves as a seal between your engine block and cylinder head.  It keeps the combustion gases in the combustion chamber while keeping the coolant in the water jacket.  A blown head gasket will allow coolant to leak into the combustion chamber, or externally, or could allow combustion gases into the cooling passages.

If coolant leaks into the combustion chamber it will come out of your tail pipe as white smoke.  It can also seep past your piston rings while your engine is off and contaminate your oil causing a milky white color.  When your engine is running, the high pressures in your combustion chamber can push exhaust gases into the cooling passages causing coolant to bubble in the radiator and pressures to get so high that coolant will actually be forced out of the coolant reservoir.

If you are experiencing any of these symptoms within a few minutes of starting your vehicle’s engine, there is a good chance you have a blown head gasket.

The good news is if you’re paying attention to these symptoms and catch them early, you often can seal your head gasket leak without having to replace the head gasket.  BlueDevil Head Gasket Sealer is a powerful formula that can seal head gasket leaks even in vehicles with very large cooling capacities like V8 engines and truck engines.  BlueDevil Head Gasket Sealer is easy to use and can quickly and easily seal your head gasket leak.

BlueDevil Head Gasket Sealer

For more information about BlueDevil Head gasket Sealer, check out our product information page here:

You can purchase BlueDevil Head Gasket Sealer along with its money back guarantee from the link above or at your favorite local auto parts stores 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 Distributer
  • DYK Automotive


Pictures provided by:

signs_of_a_blown_headgasket.jpg – By Tony Harison – Licensed By Creative Commons Via Flickr – Original Link


57 responses to “Signs of a Blown Head Gasket

  1. I have a Cadillac north star it had some white smoke coming out of the exhaust yesterday never before I call a shop they told me 3 grand I almost you know what my question is will it fix the problem,the coolant was flushed in June and no coolant in the oil and it ran a little hot but didn’t overheat my question in will this fix the problem or is you product going to make it worse please email me back because I love my Eldorado but I can’t spend 3000 on it itt about what its worth.

  2. Hi I have a 2004 BMW 545i an they are known to have valve stem issues in the 4.4 v8 I have recently came across it. My car I saying low oil pressure .My question is with the oil stop leak an conditioner will itvrestore the pressure of the oil

    1. Kaamil-

      The BlueDevil Oil Stop Leak is designed to revitalize and recondition the rubber seals and gaskets in the system. It would have no effect on restoring the pressure of the oil.

      Thank you!


  3. Hi,

    I have a 1991 Toyota Corolla that I have just done a complete engine over hall on it a few weeks ago. Last week, my car cut off on me and wouldn’t start again. upon checking the car after having it towed home, I noticed that the water in the radiator and over flow bottle bubbles when the car is idling and there is a film of white (milky looking substance) under the oil cap. Please tell me what the problem could be and if you have a product that is guaranteed to repair the problem?
    Does your product come with a money back guarantee and where can I purchase the product as I am based in Durban, South Africa.

    Thank You.

    1. Mahesh,

      Thanks for your question about your 1991 Toyota Corolla. It sounds like you’ve got a blown head gasket which definitely shouldn’t happen on a recently overhauled engine. Before using our products, we would recommend taking your car back to the shop that did the work on your vehicle and seeing if they will install a new head gasket under warranty as it could very well have been from improper installation. If that doesn’t work, you can use BlueDevil Pour-N-Go ( to seal your leak. Please contact our sales department for international shipping options.

      Thanks again for your question!
      -BD Auto Pro

      1. Phillip-

        There are so many different possibilities as to why your Malibu shut off while driving. We recommend having a certified mechanic take a look at it for a proper diagnosis. Once you have the diagnosis you will have a much better idea as to what your options are for getting it fixed.

        Thank you!


  4. My 2008 Nissan Rogue just started rattling today. It’s not over heating or anything else. Just rattling. Do you know what this could be?

    1. Wendy,

      Thanks for your question about your Nissan Rogue. It depends on where you’re hearing the rattle from. If the rattle is something you hear when you’re going over bumps it could be a loose suspension component. If that is the case, try reading our article about noise suspension components here:

      If the rattling you’re hearing is coming from your engine then it sounds like you’ve got a pulley or accessory read to fail. Since you mentioned overheating it could be that the bearings in your water pump are going bad, but it could be the idler pulley or another accessory. Try checking under your hood while your car is idling and seeing you any of the pulleys look loose or wobble. Which ever on looks bad probably needs to be replaced.

      Thanks again for your question!
      -BD Auto Pro

  5. Hi,

    I have a 2004 Dodge Ram 1500 V8, 4.7 L truck.
    Sometime ago, my truck’s engine overheated during a ride through a mountain. I stopped, let it cool, checked the coolant and continue the trip.

    After a while, maybe a month, while going to work, I noticed it suddenly overheated again, even though I regularly check the oils and coolant. This time the engine died and I was able to stop in a parking lot. I noticed the coolant had leaked and when engine cooled I opened the radiator valve and it had oil residue in it. i was able to start the truck for a little while just enough to properly park it. The engine did not start again after that and I had it towed. The electric system was fine.

    Here’s my question: Does your product work also in my case? I read the instructions for your product and it says that after cleaning the system I have to start the engine and let run for sometime while pouring the product, etc. etc.

    So, can your product help to save my truck’s engine? Thanks


    1. Ernesto,

      Thanks for your question about your Dodge Ram. It does sound like you’ve got a blown head gasket based on the symptoms. You can try and confirm that by doing a compression check on each cylinder and seeing if one is lower than the others. The low cylinder would be the one with the hole in the head gasket. If that is the case you can try starting your truck with the spark plug removed from that cylinder, which may help get your truck to idle. You need your truck to be able to idle for at least 50 minutes without overheating to use BlueDevil Head Gasket Sealer.

      Thanks again for your question!
      -BD Auto Pro

  6. I have a 95 maxima and mi antifreeze was leaking thru mi head gasket and I check to c wea it cums from and it was in mixed with engine oil and den I changed the oil is there anyway to fix it

    1. Shaquan-

      Based on your description, we would recommend using the BlueDevil Head Gasket Sealer. You are going to want to change the oil before and after the BlueDevil process. As long as the vehicle can idle for a 50 minutes without overheating or stalling out, and you’re not losing more than about a quart of coolant/ water during that 50 minutes, the product should be able to help seal your leak.

      Thank you!


        1. Ron-

          This direction only pertains to users who are getting water/coolant into their oil. You really don’t want to operate the vehicle with water in the oil. If the water started to deteriorate the engine bearings, it would cause further engine damage, and it is likely you would need to replace the engine. Also, the product does not instantaneously seal, so you would still get a little water/coolant in the oil during the 50 minute idle, prompting the second oil change, once the BlueDevil process is complete. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!


  7. Hi I have a bmw 325i e36 and it just started overheating. I don’t have any white smoke out the tail pipe but my coolant bubbles through my expansion tank. She does not give me a rough ride but I would like to know if this is a symptom of a blown head gasket or something else?

    1. Alex,

      Thanks for your question about your BMW 325i. It is a possibly the overheating and bubbles are simply an indication of low coolant level in your car so make sure you’re engine is full of coolant and all the air bubbles have been removed from your system. Try checking for some of the other symptoms like milky oil around the oil cap. To be sure you can try doing a compression check which should be relatively easy to do on your car. If 1 or 2 cylinders have low compression, combined with the overheating and bubbles it would indicate a blown head gasket.

      Thanks again for your question!
      -BD Auto Pro

  8. I have a 2003 Chevy Cavalier. It loses coolant very rapidly, and what comes out of the exhaust pipe is largely white steam. But I don’t see any other obvious symptoms, such as coolant in the oil or vice-versa. Is it more likely a cracked block or blown head gasket? If I decide to try both Radiator and Block Sealer and Head Gasket Sealer, which is it better to try first? I am guessing that the deposits left by one product may interfere with the working of the other later on, but I don’t know that for a fact. Thanks for any suggestions.

    1. Joe,

      Thanks for your question about your 2003 Cavalier. The problem you’re describing does sound like a blown head gasket rather than a cracked block. If you had a cracked block you would have an external leak or be seeing a lot of water in your oil. We would recommend trying BlueDevil Pour-N-Go Head Gasket Sealer (available here: first as that should solve all your problems.

      Thanks again for your question!
      -BD Auto Pro

  9. I have a 2005 Buick lacrosse .. I had my thermostat changed several times and buying antifreeze… Because my car would run hot but when I get on gas it will cool down.. Month or two later it started back .. Bought another thermostat and antifreeze… For the last time , that didn’t work !! I end of driving 20 mins away from home and my car start running hot ! I let it cool down and started back because I had to get home .. As I drove it would run hot and cool down . run hot and cool down.. Start making sounds… I did pull over to let it cool off !! Finally made it home and let it rest. I was told that , I need a heater coal too because water would leak inside my car when it rain … I’m thinking , I could need a new radiator.. But someone said as long as the radiator don’t have a hole in it , its fine .. It just need to be flushed from the bottom.. As I drove home , my car made funny sounds and it drove slow and picked backed up on speed.. Cool down and run back hot ! As I mentioned before … Water pump brand new .. But the thing is , the reason the heater coal was mentioned because.. My car wasn’t blowing out hot heat when I needed it too , cool air was coming out instead … I tried to mention all details .. I just hope , I didn’t blown the head gasket !!! I love my car and its been a good car .. Lol … Helpful details please ….

    1. Brittany,

      Thanks for your question about your 2005 Buick Lacrosse. The symptoms you’re describing could possibly indicate a blown head gasket, but before you take action there we’d recommend checking for other things like smoke in the exhaust, bubbles in your overflow tank or low compression in a cylinder. You could very well have clogs in your cooling system which would cause the odd overheating and your heater to not function properly. You can start by using BlueDevil Radiator Flush (available here: to clean out your cooling system and try and get things back to normal. If that doesn’t work, it may be worth testing for a blown head gasket before you replace your radiator and heater core.

      Thanks again for your question!
      -BD Auto Pro

  10. I have a 1997 mustang gt, I haven’t had any problems with my anti freeze leaking or losing it quickly, but today my car overheated and was making a weird rattling noise coming from the engine every time I gave it gas. I got it home. There was anti freeze all over my battery and hood, so it was spraying, but I have a brand new radiator cap, and I had just put antifreeze in it 2 days ago. There are no visible leaks at all. There is white smoke coming from my drivers side exhaust only, and when I tried to put anti freeze in it, it just kept draining then flowing back up then draining again and flowing back up then checked it a couple minutes later and it was just completely drained but no antifreeze on the ground or anything. Tried pouring water in it to see if I could find a leak and there was nothing. First question, did I do damage by pouring the antifreeze in there and it just draining into where ever it drained, and then pouring water into it and it doing the same thing. Second question, what could this problem be.

    1. Mackenzie,

      Thanks for your question about your Mustang. The first possibility is that you have a bad water pump. If your water pump is bad it could be causing the rattle you’re hearing when you step on the gas and coolant would most likely be leaking around the shaft and onto the pulley which would explain there is antifreeze all over your hood and battery. Try grabbing the water pump pulley and seeing if it is wobbly or loose or if the pump housing itself is loose. This would account for the overheating, loss of coolant and noise you’re hearing.

      You probably did not damage anything by pouring the antifreeze in as long as you poured it into your radiator or overflow tank. It could simply indicate that your engine coolant was really low, or it could indicate you have a bigger problem like a blown head gasket which could have happened when your car overheated and may be indicated by the white smoke from your exhaust. If there is nothing wrong with your water pump, this may be your problem.

      Thanks again for your question!
      -BD Auto Pro

  11. I have a 2000 jeep grand Cherokee limited last week something told me to check the oil so I did and there was none so I added 4quarts and it was fine there was no thing on the oil cap at that time so a week later I had to add another quart to it and when I did I noticed a light brown/tan film on the oil cap. The truck is not running hot nor is there white smoke coming out but I am losing oil and coolant somehow and today I noticed my oil pressure gauge dropping down to 20 at an idle but normal when I’m riding down the road. I’m praying this isn’t a head gasket issue because not even a yr and a half ago the engine was conpletley rebuilt because of a blown head gasket

    1. Kasey,

      Thanks for your question about your 2000 Jeep Grand Cherokee. The first thing we would recommend looking into is if the rebuilt engine you have came with a warranty. If it is still under warranty we would recommend having the shop that installed it or rebuilt it take a look at an engine that new shouldn’t have leaks as bad as you’re describing.

      If you had to add 4 quarts of oil, then your engine was extremely low on oil and it is possible that running it that low has caused some internal damage which may have damaged seals or bearings which could account for the leaking oil and low idle oil pressure.

      As for the leaking coolant, since you only have 1 indication of a blown head gasket, we would recommend do a few other checks for leaking coolant like a cracked radiator or bad radiator hose. Until you find the source of the leaks or have the chance to the mechanic look at the engine make sure to keep the oil and coolant topped up.

      Thanks again for your question!
      -BD Auto Pro

      1. I am just really needed maybe some info or answer if it can be provided please… I have a 95 Olds Ciera Cutlass and it from what I am seeing does have a small coolant leak, it does not show any problems with the temp getting to high but I was driving and it just died.I started it back up and it started but I dont really know whats going on. Can you possibly help me out…

        1. Dustin-

          Thank you for asking about your Oldsmobile Ciera. Based on your description, we recommend using the BlueDevil Head Gasket Sealer, found here on our website: 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!


  12. Hi,

    I have Honda City EXI 2000 model, last week i had a problem with my car which is very strange for me, after driving an 150 kms hill station drive i found over heat problem on the engine and later on next day i refilled the coolant oil and tried to return home but the coolant dried drastically and again i faced the engine heating issue, then i filled the water often [every 25 kms} and reached home, please advise what is the problem with my car.

    1. Logu-

      Thank you for asking about your Honda. Based on your description, unfortunately, it sounds like you are losing coolant a little too quickly for the BlueDevil Head Gasket Sealer to be effective. A hard part repair may be your best option. Sorry we couldn’t be of more help.

      Thank you!


  13. I have an 05 Dodge Ram 1500 with a 4.7 liter engine it has white smoke coming out of the exhaust but no oil milky residue in the oil it seems like it might be just in the water jacket will your product work for this thank you I have every symptoms of a blown head gasket accept water in the oil

  14. I have a 95 Dodge 1500 pickup with a 5.9; I have bubbling in the radiator with a yellow/brown foam (emulsified oil), low compression and plug fouling in #8 cyl, but I have no indication of water in the oil pan. I am assuming I have an exhaust and oil leak into the cooling system from a blown head gasket; my question is will the head gasket sealer work when the 45 psi oil is leaking into the 16 psi coolant?

    1. John-

      Thank you for asking about your Dodge Pickup. The BlueDevil Head Gasket Sealer is intended for water/coolant leaks. Unfortunately, we do not manufacture a product for the type of you leak you are experiencing. A hard part repair may be your best option.

      Hope this helps!


  15. I have a 2005 poniac g6 my brakes went out on me brake pads got squashy then i quickly applied my ebrakes nd pulled over next thing i know i went to start it back up in a hour and all this white thick smoke started coming out my tailpipe with a weird smell…nd the fluid look brown….now my brakes i thought it was dry my i put five bottles in and it just kept dissapering nd leaking from the middle of my car when it got lifted up at a shop… question is where is my brake fluid going and why is the white smoke coming out nd can it be fixed without buying a whole new engine????

    1. Shannah,

      Thanks for your question about your Pontiac G6. Usually, that much white smoke from your tailpipe indicates a blown head gasket. If that is the case you would also notice your coolant level dropping significantly along with bubbles in your radiator. That white smoke would smell sweet. If you do have a blown head gasket, use BlueDevil Head Gasket Sealer (available here: to seal the leak without replacing your whole engine.

      As for your brake fluid, your brake system wouldn’t hold 5 bottles of fluid so you must have a leak somewhere. The leak could be in the leak you described in the center of your vehicle if it is a broken brake line, you should be able to simply replace that brake line then refill and bleed your brake system.

      Thanks again for your question!
      -BD Auto Pro

  16. I have a Volvo 2001 s60 and it just started pouring oil not long after I got my transmission and the radiator changed ….. I’ve never had a problem with my car overheating I’ve never had a problem with the oil leak it just started pouring maybe a week after I got my transmission & Radiator changed I took it to a mechanic and they said it’s a blown head gasket and I don’t believe it it’s never overheated never could you help me out what do you think it might be

    1. Tiffany,

      Thanks for your question about your Volvo S60. Usually, a blown head gasket does not cause a large oil leak like you’re describing. We find that often times problems after a large maintenance item like you had done car be related to something done during the maintenance. In this case, our guess would be a loose transmission cooler line is allowing transmission fluid to leak out. The place to start would be identifying the oil leak. Since you described the leak as “pouring” we would recommend checking for high pressure leaks like an oil cooling line, an oil pressure sender or a cam seal as they would cause very fast leaks.

      Thanks again for your question!
      -BD Auto Pro

  17. Hello, I have a 1991 Nissan 300zx non turbo. I have recently seen white smoke from the tailpipes in the mornings when I start it but only for a second. Also when I punch the gas I notice a white smoke screen but only when it’s not warmed up yet, I bet the cars behind me really dislike me in the a.m. Besides for that I do not see any coolant in my oil and everything else works as it should but 2 days ago I charged the AC with freon cuz it’s been so hot out and while I was driving around I noticed the car starting to overheat, it never had before. I had checked the coolant about 2 weeks prior and it was nice and green and full, after it overheated I got home and checked it and it was EMPTY. ?? So I filled it up with antifreeze it took the whole gallon almost. it’s only been a couple days and it tried to get over halfway on temp but i turned Ac off and it went back down checked water and it’s good- but my oil gauge is more reactive than it has been before. All I did was add coolant-not oil. Crazy right?? Any ideas?

    1. Mike,

      Thanks for your question about your 300ZX. You might check for a few more indicators of a blown head gasket before you decide that is your problem. First, try smelling the white smoke right on start up. Water vapor is normal on a cold start so if it doesn’t have an odor, it could just be that. If it smells sweet or feels oily it could indeed be burning coolant.

      Also, if you have coolant getting into your oil it could cause your oil gauge to act differently. Coolant in your oil will look milky white so you can check for that under your oil cap, or try doing a quick oil change and check the oil in the pan afterward for coolant or milky substance.

      If you do find a blown head gasket, you can use BlueDevil Head Gasket Sealer (available here: to seal the leak and get your car back to normal.

      Thanks again for your question!
      -BD Auto Pro

  18. I have a Mitsubishi sedan model 1993 and I forgot to put water on radiator and the temp did go high. We drove the car about half kilometer without putting water. Now the radiator has a little hole. My nephew tried to drive it again yesterday and still the temperature gauge goes high. Is it possible that the head gasket was broken?

    1. Sheela-

      Thank you for asking about your Mitsubishi. Based on your description, it is very possible that the vehicle overheated and it blew the head gaskets. We recommend using the BlueDevil Head Gasket Sealer, found here on our website: . As long as the vehicle will maintain idle for 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!


  19. I have a 2003 z4 BMW. Driving home steam started up over the left side of the hood. After cooling it down I checked the radiator added water and there was no leaking. None of the other things you listed above were there either. I drove less than 2 miles and it heated up and steamed again. There is plenty of water in the radiator and there doesn’t appear to be any leaking. Any suggestions?

    1. Chris-

      Thank you for asking about your BMW z4. 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!


  20. Hey I have a 1991 subaru legacy wagon. Iv had a leck coming from under engine. My radiator water level keeps dropping iv put radiator dtop leck thru and its still lecking water level still goes down. Car has started to over heat but not to high tho goes up n down. The other day tho it has been make weird nosie. Can a blown head gasket make a weird nosie ? Im not sure if it is a blown head as no milky stuff in oil or oil cap but does bubble a bit when filling up radiator. So my question is can a blown head start making ?

    1. Lance-

      Thank you for asking about your Subaru Legacy. What kind of noise did you hear? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s symptoms and be able to make any appropriate recommendations.

      Thank you!


  21. i have a 96 jeep it start to squeal and then stop and the start again and overheat when doing this with my gen light on can this be my head gasket i checked the oil cap and dip stick she looks find i had to stop few time scared that i may blow if it hasn’t all ready but when i got back home closer she stop making the noise and stay in the middle temp wise

    1. John-

      Thank you for asking about your Jeep. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s symptoms and be able to make any appropriate recommendations.

      Thank you!


  22. Hi BlueDevil,
    I have a 2004 BMW 745Li. It recently started to blow white smoke from the exhaust and run hot while driving. I did check the oil to see if it was milky but it’s not. Does this sound like a blown head gasket, if so, will it work for me?

  23. We have a 1998 Chevy Lumina and it has normally run good. I had the oil changed recently and shortly after when I was driving it, the temperature light went up into the high range. I took it right to the station to have them check it out. They replaced the water pump and then told me the head gasket is blown. No visible leaking only symptom was the high temperature gauge. We decided due to age of vehicle, high mileage, and expense of replacing the head gasket to take it off the rode. My husband drove it home (about 6 miles) and the temperature gauge stayed down (less than half on gauge) while he drove it home. He let it sit and idle for about 45 minutes in our driveway tonight and the temperature gauge stayed down where it normally does. Wondering if we should get a second opinion on the blown head gasket and whether we could continue to drive it short distances just in our area. Thank you. MG

    1. Margaret,

      Thanks for your question about your 1998 Chevy Lumina. Blown Head Gaskets can be a little difficult to diagnose as the symptoms can be confusing and can overlap with other problems. Becuase of this, we recommend looking for a few different symptoms besides overheating like bubbles in the radiator or overflow bottle, white smoke from the exhaust or milky oil. If you have multiple symptoms working together it is a good indication that you’ve got a blown head gasket. The best way to test for a head gasket is to have a pressure test done on your cooling system to see if there is a leak and most mechanics should be able to do that for you. If you do find a blown head gasket you can use BlueDevil Pour-N-Go or BlueDevil Head Gasket Sealer to seal the leak and keep your car on the road.

      Thanks again for your question!
      -BD Auto Pro

  24. Hi! I have a 2001Chrysler limited town and country and just recently I started to Snell something from time to time. My van started blowing smoke but only when I’m in park for about 5 mins or so. when I stop for a while and then drive light white smoke comes out. What could that be??!!

    1. Tammy-

      Thank you for asking about your Chrysler Town and Country. Based on your description, it is a little difficult to tell exactly what the issue is. 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!


  25. I have a 2005 Ford Mustang V6. Sometimes when I turn the engine off the radiator reservoir tank fills up all the way to the top and over flows through the cap. I noticed when it does this that the antifreeze in the reservoir tank looks like it is bubbling which I assumed was from it be extremely hot and is boiling. My questions is what could be causing this issue and what is the fix.

    1. John-

      We recommend using BlueDevil Head Gasket Sealer for your Mustang. 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 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!


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