Fixing a Blown Head Gasket

blown head gasketFixing a blown head gasket can be a huge job.  It’s such a big job that often times it can be cost prohibitive either from a budget standpoint, or because the vehicle isn’t worth as much as the repair job costs.  A blown head gasket is also the kind of problem that if you continue driving with it can end up causing more damage raising the repair bills.

The head gasket in your vehicle is the gasket in between the 2 largest pieces of your motor, the cylinder head, and the engine block.  The engine block contains the crankshaft and pistons and the cylinder head contains the valve train.  When these two pieces are bolted together, they form the combustion chamber above the piston.  There are also oil and coolant passages that travel between the cylinder head and engine block through the head gasket.

The head gasket is responsible for sealing all of these cooling and oil passages as well as the combustion chamber make sure oil stays in the lubrication system, water stays in the cooling system, and combustion gases stay in the cylinder above the piston.

A blown head gasket is simply a head gasket that has started allowing one or more of these fluids or gases into a space they shouldn’t be.  The combustion chamber is where the temperature gradients are the most extreme and the pressures are the highest so more often than not, this is where a leak will form.

You’ll notice you have a blown head gasket in your vehicle due to the consequences of coolant, oil, or combustion gases being in the wrong place.  You may see bubbles in your radiator or coolant reservoir as combustion gases are leaking into your cooling system.  You may also notice white smoke from your tailpipe as coolant leaks into your combustion chamber and is burned.  Lastly, you may find white milky substance in your oil as coolant leaks into your oiling system.

If you notice any of these symptoms or otherwise suspect you have a blown head gasket, you can check for sure using a few different methods.  First, some auto parts stores sell test kids that can chemically check for combustion gases in your engine coolant which would confirm you have a blown head gasket.  You can also try checking the compression in the cylinders in your car.  If you find one cylinder with very low compression it could indicate you have a head gasket leak into that cylinder, but it may also indicate you have bad piston rings in that cylinder.  Lastly, if you have all the symptoms listed above at the same time, it’s a pretty safe bet you have a blown head gasket.

cylinder head gasketReplacing a blown head gasket is such a hard job because you have to separate the cylinder head from the engine block.  This step in itself does not take very long, but to get there, it requires the removal of a lot of other components.  You have to remove things like the intake and exhaust manifold, the alternator and power steering pump, any wiring going to or across the cylinder head, fuel lines and sometimes the time belt or chain.  Also, if you don’t reinstall everything perfectly, you can quickly cause catastrophic damage to your engine.

The good news is there is a way to fix your blown head gasket without all the work and without even removing the old gasket!  BlueDevil Pour-N-Go Head Gasket Sealer can seal the leak in your head gasket quickly and easily without removing your old head Gasket.  BlueDevil Pour-N-Go Head Gasket Sealer is a chemical sealing agent that will form a chemical weld at the leak keeping your coolant and combustion chamber separate.

For more information about BlueDevil Pour-N-Go Head Gasket Sealer, visit our product information page by clicking on the banner below!
BlueDevil Pour-N-Go Head Gasket Sealer
You can also purchase BlueDevil Pour-N-Go Head Gasket Sealer at any of our partnering 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:

blown_head_gasket.jpg – By Stocksnapper – Licensed by Thinkstock Photos – Original Link
cylinder_head.jpg – By Evgeniy_Bibikov – Licensed by Thinkstock Photos – Original Link

13 responses to “Fixing a Blown Head Gasket

  1. Hi I have a 1999 Mazda millena and I think I have a head gasket leak because every time I add water to radiater and fill it up white smoke/vapor comes out a little and more when I rev it up a little but if I start it up the next day with no water there no smoke ….and it over heats a lot ….and I all ready took out the thermostat should I get the blue devil 32 ounce and use half for my v6 or should I just use the poor and go …and if I use the poor and go would I need to add thermostat first …

    1. Devon-

      Thank you for asking about your Mazda Millena. 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 and fill it with water prior to use. However, if the thermostat is difficult to remove or you would rather not then you can always go with the “Pour N Go”.

      Thank you!


    1. Norbert-

      In terms of using the BlueDevil Head Gasket Sealer, we recommend at least 2 hours of a cool down from when the vehicle was last run. That would be cold enough to start the process. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!


  2. I have a 2001 Cadillac DeVille Northstar engine when I use the 32-ounce Blue Devil it won’t idle for 50 minutes without overheating how can I go about is there a bypass on the heater coil or the heater core

  3. I have a 2005 Pontiac Grand Prix my car was running hot a lot I changed the water pump it worked fa one day n it was still running hot I had a crack in my radiator it ran hot again so I change the radiator n the thermostat n it’s still running hot the antifreeze it’s bubbling in the overflow jug n plus the temperature is still going up I think I blew a head gasket can I use this product will it solve my problem I dnt have any water leaking out my oil isn’t milky it’s just keeping a high temperature

    1. Kara-

      Thank you for asking about your Pontiac Grand Prix. We recommend using BlueDevil Head Gasket Sealer ( 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!


  4. My Ford Escape 2008 was overheated two weeks ago. The investment need it to repair the truck was to high. A mechanic talk to me about products that could help with my problem. I made a research through the web and analyse my options. I found Bluedevil and read about it. Also, check YouTube to look what others have done in my situation and follow there example. Bluedevil deliever there promise and help in my situation. Has past two weeks and the truck have no engine problems so far. I can believe yet this really works. Thanks Bluedevil.

    1. Guillermo-

      We are happy to hear of the success you have had with the BlueDevil Head Gasket Sealer. Once the product seals, it creates a permanent seal, so you should be good to go at this point.

      Thank you!


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