10 Best Head Gasket Sealers (Updated 2017)

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The rider always faces a problem regarding the overheating engine. This overheating problem arises from leaks of the head gasket and cooling system. Something warped head and crack head or leak of oil may cause this overheating problem. The best head gasket sealers are a solution for this problem of head gasket.

Best Head Gasket Sealers Comparison Chart 2017

No.ProductBrandWeightPrice
1BlueDevil Head Gasket SealerBlueDevil Products2.9 poundsCheck
2Bar's Leak HG-1 HEAD SEALBar's Products2.5 poundsCheck
3Bar's Leaks 1111 Head Gasket FixBar's Products1.6 poundsCheck
4Bar's Leaks 1100 Head Gasket RepairBar's Products1.4 poundsCheck
5Blown Head Gasket Fix Repair SealerSteel Seal2 poundsCheck
6Pour-N-Go Head Gasket SealerBlueDevil Products1 poundCheck
7Head Gasket Sealer FlushBlueDevil Products5.5 poundsCheck
810-2018 Head Gasket SealerACDelco0.84 PoundsCheck
9SLST3501 K-Seal Gasket SealerSolv-TecA1 poundsCheck

This head gasket sealer should have below quality and the buyer needs to consider those qualities before buy-

Note: The buyer must consider above issues before buy a head gasket sealer.

More Details about Our Recommended Product

Head gasket become disable due to leakage, overheating and failure of the cooling system. When there is a leak in head gasket, the steam and water will fall on the engine. As a result, the engine becomes overheated. This overheated engine cannot run for a long time. Sometimes, engine oil also falls on the engine due to leak.

One of the best features of this best head gasket sealer, is it don’t block cooling system. Thus the vehicle will not face any damage by it. To seal the leak, it used a thermo-chemical bonding process.

Advantages and features of Steel Seal

  • This sealer can seal the leak of head gasket permanently.
  • It is used by the repair shop, garage, workshop etc.
  • It can be used for vehicles who have 8 Cylinder Engines.

How to Use Steel Seal

To overcome or avoid Head gasket failure, the user must temporarily drain and also replaced with the fresh water. If water is available there, then the user must change the filter and oil. The user has to do this before proceeding.

The user who has 4 cylinder engine should use 16 0unces and who have 6 cylinder engine should use 24 ounces. The user needs to use 32 ounces for 8 cylinder engine.

Three easy steps to repair

  1. When the engine will be cold the user needs to remove the radiator cap. Steel Seal needs to pour directly into the radiator. Now, the user has to lock it with the radiator cap.
  2. The user needs to turn on fan and heater to maximum. Now the user has to start the engine. Keep starting the car engine for at least 30 minutes. After that, the user should to Turn off the engine and let it be cool completely. The user needs to refill antifreeze and water into the radiator and then put tightly the radiator cap on radiator head.
  3. Now, the user needs to leave the Steel Seal into the system drive of their vehicle.

best head gasket sealer review

10. Solve-TecA Ultimate Permanent Head Gasket Sealer

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K-Seal ultimate is a permanent solution for any types of leaks in the head gasket, cooling system and also for the cylinder. It is a multi-purpose system to repair coolant leaks.  It will permanently repair leaks of coolant head, heater matrix, head gasket, block, freeze plug, radiator and water pump casing.

It is very easy to use. The user just has to shake it and then refill it in the tank. Now the can enjoy a long drive smoothly and safely.

Features and benefits of KSLST3501 K-Seal Head Gasket Sealer:

  • This K-seal head gasket sealer is designed with highly concentrated version.
  • This K-seal can repair cracked or warped head of cylinders.
  • It does not create the block and also helps the user to remove blocks.
  • A Powerful Trade trusted formula has been used for this K-seal head gasket sealer.
  • This k-seal head gasket sealer can be used in a hot engine and also in cold engine. It can be used in overflow tank as well.
  • It is one of the best quick fixes for blown head gasket.
  • The manufacturer company is giving Guarantee that it will work the must. If not the user will get back their money.
  • It is Mixes with antifreeze and coolant. Thus the user doesn’t need to flush or drain out the tank or radiator.

The best feature of this sealer, it can be used with plain water. This best liquid head gasket repair got the US standard ASTM D-3147.  This best sealer does not contain any harmful element or particles. Thus it will not create any damage or harm to the engine. K-Seal ULTIMATE is the best sealer this is because it can be used in all types of water cooled engines. It also can be used in a bike, locomotive, Ford Model and etc.

This sealer has the compatible ability with the antifreeze and coolant formulas.  K-Seal ULTIMATE can fix leaks of coolant head, porous blocks, head gasket and other blocks.  This sealer will not repair oil leaks.

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09. Blue Devil Pour-N-Go Head Gasket Sealer – 16 Ounce

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Blue Devil is one of the renowned head gasket manufacturers in the world. One of their best head gasket sealer is 00209-6PK pour-n-go head gasket sealer. The size of this sealer is 16 ounces.  It is easy to use. It can repair and seal leaks and head of head gasket, cooling system, and cylinders.

Advantages and features of Blue Devil Pour-N-Go Head Gasket Sealer:

  • This best head gasket sealer is very easy to use. The user has to do only 4-step to complete the whole process.
  • The user just needs to refill it and can enjoy a smooth ride.
  • The Blue Devil has compatibility ability for water and also antifreeze.
  • It can seal permanently leaks of the head gasket.
  • It has the ability to seal leaks of freeze plugs.
  • This best liquid head gasket sealer can be used for both types of gas engines vehicle and diesel engines vehicle.
  • It can also seal leaks of heater cores.
  • This best liquid head gasket sealer does not contain any harmful chemical or particles. Thus it is safe for any engine.
  • This head gasket will not create any block or damage in the cooling system.

The Blue Devil head gasket sealer is the best solution for those who wants to repair their head gasket and cooling system at low cost and less time. It can seal any leaks of the Cooling System. The user does not need any flush or thermostat removal to create blank space in the tank or radiator.

Technical Details of Blue Devil (00209-6PK) Pour-N-Go Head Gasket Sealer:

This Pour-N-Go Head Gasket Sealer is offering under the brand name of Blue Devil.  It has the weight of 2.0lbs. This best head gasket sealant is made of silicone. This head gasket sealer takes 1 hours for curing. This best head gasket sealant is chemical Adhesive Weld product. This sealer Dry Color is White. The manufacturer company recommended that the user should use flushing Cleaning Method. When the user flushing their car with it, they need to wear gloves for the safety purpose. The size of this head gasket sealer is 16 ounces. The Aluminum, steel, Cast Iron and Plastic have been used to make its surface.

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Best Head Gasket Sealers

08. ACDelco Head Gasket Sealer – 16 oz

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AC Delco is a sister concern of the famous brand “general motors”. It a division of general motor on parts and services. The company has giving services to the user in the automotive industry for many years. This company has a very goodwill for their spark plugs and also for batteries.

ACDelco is now offering head Gasket Sealer. This head gasket sealer has been designed with the concept of strong sealing ability. This one of the best head gasket sealer can seal leaks and repair heads of compression, oil, gasoline, water, antifreeze, pressure, and also vacuum. This one of the best head gasket sealer can also prevent corrosion of fitting threads, bolt, and stud. The manufacturer company recommended to use it for the professional purpose only. It is not at the retail shop or retails use.

It is specially designed for the high-tech industry like the trucking, marine, automotive, and aviation industries. This industry has to use high temperature of minimum 50 degrees Fahrenheit which is -46 degrees Celsius to the maximum 400 degrees Fahrenheit which is 204 degrees Celsius. This best sealer can strongly seal against the compression, oil, gasoline, water, antifreeze, pressure, and also vacuum leaks. The length of this ACDelco head gasket is 4.5 inches and the wide of this sealer is 3.4 inches with the height of 3.4 inches.

Features and benefits of ACDelco head gasket sealer:

  • This best sealer is effective for sealing on the oil pan, t-joints, manifold corners, ladder frame, and front with rear covers, manifold end seals, intake and cam covers.
  • This best liquid oil leak sealer has easy application. This best liquid oil leak sealer can work quickly.
  • This best sealer product has the ability of High viscosity. This high viscosity can cures against exposed to air.
  • It is specially designed for the high-tech industry or professional use only.
  • This best gasket sealer can be used in the marine, automotive, trucking and aviation industries.

This best gasket sealer can seal against water, antifreeze, compression, pressure, oil, gasoline and vacuum leaks.

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07. BlueDevil Head Gasket Sealer w/Radiator Flush

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The Blue Devil head gasket sealer has the ability to repair cracked head and warped head of the cooling system. It has the ability to seal leaks of the head gasket and cooling systems. It has the ability to seals and repair others like freeze plugs, heater cores and leaking radiators. The Blue Devil head gasket can be used in oil engine and gas engine.

Features & Benefits of Blue Devil 32oz Head Gasket Sealer

  • Blue Devil head gasket sealer is very easy to use. It needs 4-step to complete the whole process.
  • This head gasket sealer takes only 2 hours to be installed or completed.
  • The Blue Devil has compatibility ability for water and also antifreeze.
  • This best liquid head gasket sealer can be used for both types of gas engines vehicle and diesel engines vehicle.
  • Blue Devil head gasket sealer has a great success rate and it is more than 95%.
  • This best liquid head gasket sealer does not contain any harmful chemical or particles. Thus it is safe for any engine.
  • This head gasket will not create any block or damage in the cooling system.
  • It is the best solution for those who wants to repair their head gasket and cooling system at low cost and less time.

The manufacturer company guaranteed that it can fix all types leaks of the cooling system. It has the ability to Seal leaks of Blown Head Gaskets Permanently. It can Permanently Seal Leaks of the Radiators. It can repair warped and cracked heads of a cylinder and also can Permanently Seals leaks of cooling systems. It can also seal leaks of heater cores permanently. It is 100% guaranteed that it will work on engines.

Technical details of Blue Devil 32oz Head Gasket Sealer

This 32oz Head Gasket Sealer is offering under the brand name Blue Devil. The weight of this Blue Devil 32oz Head Gasket Sealer is 3.0lbs. This best head gasket sealant is chemical Adhesive Weld product. This best head gasket sealant is made of silicone. This head gasket sealer takes 2.5 hours for curing. The dry color of this product is blue. The manufacturer company recommended that the user should use flushing Cleaning Method. The size of this head gasket sealer is 32 ounces. The Aluminum, steel, Cast Iron and Plastic have been used to make its surface.

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06. BlueDevil Pour-N-Go Head Gasket Sealer

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There are lots of head gasket sealer manufacturer in the world and Blue Devil is one of them. Blue Devil Pour-N-Go Head Gasket sealer is one of the best sealers in the market. It can permanently seal leaks in the cooling system and the head gasket such as warped and cracked heads, heater cores, blown head gaskets and freeze plugs.

Features & Benefits of Pour-N-Go Head Gasket Sealer

This Pour-N-Go head gasket sealer can be used for both gas engines and diesel engines. Pour-n-go head gasket sealer can work quickly and at a low cost. Thus it saves the user’s time and money as well.

  • This best head gasket can Works on those vehicles who have Northstar engines
  • This best head gasket sealer for the northstar engine does not contain any harmful chemical or solid and also particulate. Thus it will not harm the engine of vehicles.
  • It is very easy to use. Thus the user does not need any removal for thermostat or flush.
  • This best head gasket sealer for Northstar engine can seal a leak of head gasket Permanent.
  • The best head gasket sealer repair leak and cracked head or warped heads of a cylinder, heater cores, freeze plugs and cooling system.
  • It also helps to clear or remove the block of the cooling system.
  • The success rate of Pour-N-Go head gasket sealer is more than 90%.
  • The user can do it very easily. They have to just refill it and can go for a smooth ride.

Technical details of BlueDevil Pour-N-Go Head Gasket Sealer

This Pour-N-Go head gasket sealer is offering under the brand name of Blue devil. The weight of this best head gasket sealer is 2.0lbs. It is Chemical weld type product used to repair cracked head of the cylinder and seal the leaks. Silicone has been used to make this head gasket sealer. The Curing Time of this head gasket is 1 hour. It is the white color. The manufacturer company recommended that the user should use flushing Cleaning Method. When the user flushing their car with it, they need to wear gloves for the safety purpose. The size of this product is 16 ounces. The Surface of this product is made of Cast Iron, Steel, Aluminum and Plastic.

How to use:

The user has to think that, the radiator or tank is overflow or not? If it is full, then needs to drain down or remove the anti-freeze. Now, the user has to Start the engine and turn on the heater at max.  Then, the user has to put Blue Devil Pour-N-Go head gasket sealer into the radiator. After that makes sure replace radiator cap tightly. Now, the user has to wait for 50 minutes at usual temperature. Now they can enjoy a long ride.

05. Steel Seal – blown head gasket sealer reviews

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Nowadays, most of the vehicle has an engine block and a cylinder. The user will find there the cylinders, rocker arms, valves, and pistons. The head gasket basically situated between the cylinder and an engine block. This head gasket and cooling system sometimes got leaked. This leaked makes heated the engine and once time it becomes overheating. There are some reasons for overheating like External Oil Leaks, Contaminated Oil, Tinted Spark Plugs, Poor engine, Excessive pressure. That reason also leads to Severe Overheating.

To overcome this problem the user needs to seal leaks. Steel seal head gasket is the best solution for it. It also known by another name is called gasket sealant. The head gasket sealer is a glue, paste or sprays that seal the leak area.

Features and advantages of steel seal blown the head gasket

  • The best feature of this head gasket sealer it can seal a leak permanently.
  • The best head gasket sealer repair crack of the head gasket and head of the cylinder.
  • The user can change it very easily.
  • It is trusted and guaranteed product and also using by the millions user all over the world.
  • It will work 100% sure. If not then the manufacturing company will back the user Money.
  • This head gasket sealer can be used for the vehicle which has 6 Cylinder Engines.

How to Use a Head Gasket Sealer

The user needs to follow below instruction for better results-

  1. First, the user has to drain and flush their radiator until the radiator will become clear. The user can user water to clean it.
  2. Before put the head gasket sealer, the user needs to fill this radiator with the help of water. The user also has to keep enough space for sealer in the radiator.
  3. Now the user can put sealer into the radiator.
  4. Now, the user needs to start their car.
  5. Turn on the heat with the maximum limit.
  6. Let wait for 15 to 30 minutes. But the user has to make sure that, the cooling fan is running at high speed.
  7. After 30 minutes, the user will stop engine and let it be cool

After become cool the user has to flush out the sealer. Now the user can check the temperature.

04. Bar’s Leaks 1100 Head Gasket Repair

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Sometimes head gasket and cooling system have leaked. This leak makes cooling system failure and makes head gasket overheating. This overheating stopped vehicles engine. To avoid this problem the user can use Bar’s Leaks 1100 head gasket. This best head gasket sealer can repair it in a scientifically way. One of the best features of it, it can seal a leak of the head gasket and cooling system permanently. The best head gasket sealer repair the leak of most vehicles at a low cost and time. Thus it saves money and time of the user.

Advantages and features of Best Head Gasket Sealer:

  • This best head gasket sealant can stop or repair or seal all types Block Leaks in the head gasket and cooling system.
  • It is one of the best head gaskets for aluminum heads and also can Seals cracked heads and blocks of the cylinder and cooling system.
  • It is one of the best quick fixes for blown head gasket.
  • The Bar’s Leaks 1100 head gasket is the best solution for Car, Suv, Atv, Truck and van.

Technical details of Bar’s Leaks 1100 Head Gasket

This 1100 head gasket sealer is offering under the brand name Bar’s Leaks. This best head gasket sealer contain some material which has the strong ability to seal leak of the head gasket and cooling system. The manufacturer company does not use any lubricant in this product. The manufacturer company is giving warranty for compatibility. The sealer will be boiling at 219 Degree Fahrenheit. This sealer does not contain any non-toxic materials. This best head gasket sealer can compatible with all types of Radiator Material Compatibility. This head gasket sealer is available in reddish brown color. The length of this sealer is 3.50 inches and the wide of this sealer is 1.80 inches with the height of 8.40 Inches.

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03. Bar’s Leaks 1111 Head Gasket Fix

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Bar’s Leaks 1111 Head Gasket Fix is one of the best liquid oil leak sealer. This head gasket fix is contained sodium silicate sealing liquid technology which is compatible with all types of antifreeze. It has various-size sealing particles to stop or seal or repair leaks of the head gasket and cooling system. The best feature of this head gasket fix is, it will not harm vehicles engine.

This best head gasket sealer can use for the water-cooled gasoline vehicles as well as diesel engines vehicles. It is one of the best head gaskets for aluminum heads and also cast-iron heads. It also repairs cylinder heads, intake gaskets, head gaskets, cracked blocks with freeze plugs.

Features and benefits of Bar’s Leaks 1111 Head Gasket Fix

  • This best quick fix for blown head gasket sealer can seal or stop or repair Block Leaks in the head gasket and cooling system.
  • This best head gasket sealer can Seals Cracks of Cylinder Heads. It also repairs Blocks of the cylinder head.
  • It is one of the best quick fixes for blown head gasket.
  • It can be used in Car, Suv, Atv, Truck and van.

Technical details of Best Head Gasket Sealer

This 1111 head gasket fix is offering under the brand name of Bar’s Leaks. This weight of this best head gasket fix is 1.7lbs. This best head gasket fix has radiator cooling automotive system. This product is marketed by a Container Bottle. The size of this package is 24 ounces. This Bar’s Leaks 1111 Head Gasket Fix can be used in SUV, Truck, van, ATV and Car. This best head gasket sealant is Compatible with all types of antifreeze. This best intake gasket sealer has Lubricant. This best liquid head gasket sealer is compatible with radiator material. The manufacturer company is giving warranty for compatibility. The manufacturer company is recommending that the sealer should change after every 12000 miles. The manufacturer company is giving warranty for compatibility. The sealer will be boiling at 219 Degree Fahrenheit. This sealer used non-toxic materials.

head gasket sealer review

02. Bar’s Leak HG-1 HEAD – Top Head Gasket Sealer

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Bar’s Leaks is offering HG-1 head sealer which is one of the strongest antifreeze compatible sealer. It can seal or repair of Carbon Fiber Block, Head Gasket and also Cooling system. The best part of this product is, it has the ability to seal any minor leaks to the major leak. It used the best sealing formula to stop all types of coolant leaks in copper, plastic, cast iron, heater cores, freeze plugs, intake manifolds, cylinder heads, aluminum radiators, gaskets, and engine blocks.

Advantages and features of Bar’s Leak HG-1 HEAD SEAL

  • This head sealer can Repairs blown head. It also can repair the gasket leaks.
  • This Sealer also can repair cracked heads and blocks of a cylinder.
  • It prevents engine to be heated due to leaks.
  • It has the ability to fix leak of freeze and also core plugs.
  • It can avoid Smoking.
  • It is very Easy to Use and needs only one step to use.
  • It can seal leaks of head gasket safely.
  • This best coolant sealer can Quickly Stops leaks or repair leaks of the Coolant system.
  • This head gasket sealer can seal a leak quickly and at a low cost. Thus it saves user money and time. Usually, it takes less than 60 minutes to seal or repair a leak.
  • To seal or repair gaps and cracks permanently, it used the various size of sealing particles.

This Bar’s Leak HG-1 head sealer has used sodium silicate sealing liquid technology in their product which is antifreeze-compatible. One bottle of Bar’s Leak HG-1 head sealer can treat 6 quarts which are 1.5 gallons to 16 quarts which are 4 gallons cooling systems. The size of this product is 24 ounces or 680 grams.

Specification of Bar’s Leak HG-1 HEAD SEAL

The HG-1 head sealer is offering under the brand name of BAR’S Leak. The weight of this product is 2.3lbs. It has Automotive System called ‘Radiator Cooling System’. The manufacturing company is offering this product in a bottle container. This best head gasket sealer can stop leak permanently.

This leaks sealer can be used in Car, Truck, SUV, ATV, and van. The manufacturer company recommends that the user needs to use a head sealer after every 12000 miles run. The manufacturer company is giving warranty for compatibility. The sealer will be boiling at 219 Degree Fahrenheit. This sealer used non-toxic materials. This sealer is made of multi-material. The length of this sealer is 9.40 inches and the wide of this sealer is 2.60 inches with the height of 2.60 Inches.

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01. BlueDevil Head Gasket Sealer- Best Head Gasket Sealers

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The Blue Devil Head Gasket sealer has the ability to seal leak permanently. This best head gasket sealant can repair or seal leaks in Warped or Cracked Heads, Heater Cores, Blown Head Gaskets, and Freeze Plugs. The Blue Devil head gasket sealer does not contain any solid and also particulate matter. Thus the engines will not harm by using it. The Blue Devil head gasket sealer bonds to cast, alloy, metal, aluminium and plastic.  It is not only safe for the gasoline engine and oil engine but also easy to use.

Advantages and Features of Blue Devil head gasket sealer

Blue Devil has a great success rate to repair head gasket leaks and cooling system leaks. It is 100% guaranteed that it will repair head gasket leaks and cooling system leak permanently. The user of Blue Devil head gasket sealer is very easy. It has the only 4-step process. This process consumes only 2 hours to be completed. Other products on your shelf take 2 days to install. Blue Devil is the best to repair solution within lowest budget and lowest time. Blue Devil head gasket sealer is compatible with antifreeze and water. It can be used for gas engines as well as diesel engines.

  • The best part of this product is, it repairs any leak permanently.
  • It doesn’t contain any solid element or particulate element. Thus the head gasket and engine will not harm by using it.
  • Other leaks repair systems are costly where Blue Devil head gasket sealer is cheap.
  • If the user wants to repair leak by others way it takes so many time. But the blue head gasket leak sealer takes less time to repair.
  • This best gasket sealer is Safe and very easy to use.
  • BlueDevil has a great success rate and it is about 95%.
  • Another best part of this Blue Devil, it will not damage and block the cooling system.
  • It is guaranteed that the Blue Devil head gasket sealer can fix all types leaks of a cooling system.

Specification of BlueDevil Head Gasket Sealer

This head gasket sealer is offering under the brand “Blue Devil”. This best head gasket sealer is compatible with Antifreeze. The size of this container is 32 ounces. This product container is made of the plastic bottle. One Blue Devil head gasket sealer can serve or treats 4.5-gallon system. It can seal leaks of the heater core. It cannot seal leak of the water pump. It is the best Permanent Repair solution for head gasket leaks. This sealer has sodium silicate.

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External Resources:

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Last Word: You have the proper right to justify these sealers. But every time it is not possible to choose the right product without experts recommendation. So, our experts reviewed finding the best head gasket sealers for you. Hope you will enjoy this!

31 thoughts on “10 Best Head Gasket Sealers (Updated 2017)

  1. john zubak

    Here’s the scenario: 2003 Nissan Altima 2.5 liter, 175K miles on it. Symptoms: Losing coolant, about 8oz a day, but no external leaks. Had a problem with heat going back to last winter – there is no heat when the engine is at idle, the engine has to be around 2K revolutions or higher to get heat from the heater core. This is because there is combustion gas constantly leaking into the coolant system creating a vapor lock in the heater core. Engine has occasional misfires in cylinder 3, I believe caused by coolant leaking into that cylinder. If the radiator is running under pressure the engine sputters and struggles to run at times – I believe because an over-pressurized coolant system is forcing some coolant into the engine. Setting the radiator cap so the radiator doesn’t pressurize, the engine runs fine. Replaced both thermostats (yes there are two for some reason) and made no difference. Given those circumstances I was very certain there was a head gasket issue. Because of the high mileage I didn’t want the expense of doing a head job, so decided to give Blue Devil a try.

    I followed the instructions on the bottle to the letter with these exceptions: (1). Idled the engine with the Blue Devil mixture in it for 80 minutes, not 50 as the instructions state. After letting the engine cool overnight and starting it, it was rough getting it going and it sputtered a bit at first. This led me to believe that the mixture may have bled into a cylinder while under pressure and the car not running. So: (2). I drove the car for 3 days, about 200 miles, with the mixture still in radiator and thermostats out, to give the pure mixture more time to seal any leaks. (3). After 3 days driving I drained the coolant down, keeping the liquid, put the thermostats back in, then added enough anti-freeze for a 50/50 mix. Topped up with the Blue Devil/water mix and bled air out of the system..

    It’s now been over 2 weeks since I used the Blue Devil, I’ve driven about 1500 miles including a day trip of around 400 miles. Engine runs great, there are no misfires, no loss of coolant, no excess pressure and there is ample heat from the heater core with the car at idle. So at this point, problem is 100% fixed. Blue Devil did the job as advertised and I’m a happy customer so far. This is supposed to be a permanent repair so real proof will be how it holds up over time, including the upcoming winter. I’m hoping to get 2 to 3 more years from the car, until the car I just purchased for my wife is paid off and I can afford to replace this one. I will update this review as time passes so keep tuned, but so far, so good!

    **UPDATE** – October 3 2016, going on 2 months and over 4K miles driving after using the product. Car continues to run great, no indications of any head gasket issues. I’ve driven the car on 2 trips, one 350 miles and one 750 miles at speeds up to 80mph. No problems and am getting better gas mileage on the trips than ever, 31 to 32 mpg highway.

    **UPDATE 2** – January 5, 2017 – it’s now been 10K miles since using the product. Still no issues at all, no coolant leaks or loss, no air or combustion gasses getting into the coolant system. Prior to the Blue Devil repair, air/combustion gas would be trapped in the heater core meaning no heat inside the car unless RPM’s were very high. Now there is no problem with heat, even at idle the heat blows strong. I’m sure results of using the Blue Devil Gasket Sealer may vary depending on the type and extent of damage to the head gasket, but in my case it has resulted in an effective, permanent, and very cost-efficient repair. I would not hesitate to use it again in the appropriate circumstance, which would for me be a high mileage vehicle, exhibiting symptoms of head gasket failure, having a cooling system that is in good condition. Fully drain, clean and flush the cooling system first, then use the Blue Devil per instructions, additionally driving the vehicle over a few days and a couple hundred miles before draining and adding the anti-freeze back in the system (must be done in non-freezing temps of course!) That is the process that was successful for me. I will continue to honestly update this review as time goes on.

    **UPDATE** – August 21, 2017. It’s been one year, 21,500 miles and I’ve had no problems with the car at all. Running great, no coolant or head gasket leak.

    Reply
  2. UteX

    when the thermostat is out water shoots out of where it should be.what should i do. put the thermostat back in and then blue devil(1995 trans am 5.7L

    Reply
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