The head gasket is a pivotal part of your car’s engine. Located between the head and engine block, the head gasket protects your engine’s internal combustion process.
Head gaskets stop leaks in your engine, help to preserve its power, and aid in compression. But, like any other car part, head gaskets can fail, and spectacularly.
For this reason, investing in a head gasket sealer is important. Pricing for these sealers can vary between $14.50 and almost $70.00.
Head gasket sealers are essential for ensuring your engine’s health. Read on if you’re experiencing engine issues and wondering how to use a head gasket sealer.
What Is Head Gasket Sealer?
The function of the head gasket is to seal the internal combustion chamber and to allow coolant and oil to move through the engine without mixing.
When the seal is too loose or develops cracks, it can have severe consequences for the engine, especially if you continue driving.
For this reason, if there is an issue with the head gasket, it should be dealt with promptly to ensure no more problems occur, and sealant can help with this.
Head gasket sealant fills in the cracks on a damaged head gasket. It forms a seal that prevents further leaks from occurring, effectively patching up the damaged area.
It is a stop-gap solution but shouldn’t be relied on in the long term for major leaks.
How Does Head Gasket Sealer Work
Head gasket sealer is a substance made specifically for sealing up cracks on the head gasket. These cracks typically form between the engine block and the cylinder head.
Because it closes any potential leaks, this type of head gasket seal allows you to continue driving your vehicle even with a damaged head gasket.
Products that seal a blown head gasket while the engine is running use chemicals that react with the combustion chamber heat and pressure to form a solid seal at the leak point.
Again, these only work where the combustion chamber meets the water jacket. They won’t fix any other type of head gasket leak.
How long this fix will last depends on the type of sealer you use. There are temporary and permanent head gasket sealers on the market, most of which are made out of a mix of epoxy and different chemicals.
Epoxy is an excellent choice of material for this job because it doesn’t dry up when exposed to the engine’s high temperatures. Temporary sealers last for a certain number of miles or months depending on the brand while permanent sealers can last for years.
What is the best product to seal a head gasket?
There are many different types of head gasket sealers on the market, so it can be hard to know which to choose. Below are the top three products available based on reviews.
- BlueDevil Head Gasket Sealer
- Steel Seal Head Gasket Repair
- K-Seal ST5516 HD
These different sealers are all simple-to-use solutions from well-established brands, and depending on your exact needs, you should find top results from using each of them to seal up your head gasket. Prices vary from store to store, so shop around for the best price.
Types of Head Gaskets
Head gaskets are vital components in an engine, serving the crucial role of sealing the combustion chambers and maintaining the separation of oil, coolant, and exhaust gases.
The type of automotive head gaskets used in an engine can vary, and each type has its characteristics and applications. In this article, we’ll delve into the different types of head gaskets commonly found in engines.
#1. Composite Head Gaskets.
Composite head gaskets are among the most common types used in automotive engines. They are constructed from multiple layers of materials, typically including a core layer of steel or graphite sandwiched between layers of composite material.
These gaskets offer a balance of durability and flexibility, making them suitable for a wide range of engine types.
Advantages
- Good sealing properties.
- Resilience to fluctuations in temperature.
- Cost-effective.
Applications
Composite head gaskets are found in a variety of vehicles, from everyday commuter cars to trucks and SUVs. They are versatile and work well in both lightweight and heavy-duty engines.
#2. MLS (Multi-Layer Steel) Head Gaskets.
MLS head gaskets are known for their robust construction and excellent sealing capabilities.
They are composed of multiple layers of thin steel sheets that are coated with a high-temperature elastomer. A layer’s sealing characteristics are enhanced by embossing to minimize leakage risks.
Advantages
- Exceptional sealing performance, even under high pressure and temperature conditions.
- Durable and resistant to deformation.
- Suitable for high-performance and turbocharged engines.
Applications
MLS head gaskets are often used in high-performance vehicles, sports cars, and engines with forced induction systems, such as turbochargers.
#3. Solid Copper Head Gaskets.
Solid copper head gaskets are made entirely of copper, and they are known for their unique properties.
These gaskets are typically thicker than other types and require careful machining to fit the engine block and cylinder head precisely.
Advantages
- Excellent heat conductivity.
- High tensile strength.
- Ideal for custom engine builds and racing applications.
Applications
Solid copper head gaskets are commonly used in high-performance and racing engines where precise customization is necessary to achieve the desired compression ratio and sealing performance.
#4. Rubber-Coated Head Gaskets.
Rubber-coated head gaskets, also known as composite rubber gaskets, feature a rubber or elastomer coating on one or both sides of a steel or composite core.
This rubber coating enhances the gasket’s ability to conform to irregularities on the engine block and cylinder head surfaces, improving the seal.
Advantages
- Excellent conformability.
- Effective sealing on imperfect surfaces.
- Resistance to oil and coolant.
Applications
Rubber-coated head gaskets are commonly used in engines where surface irregularities or imperfections are a concern. It is possible to achieve a reliable seal even when the mating surfaces are not smooth.
#5. MLS with Integrated Sealing Rings.
This type of head gasket combines the MLS design with integrated sealing rings. These sealing rings are typically made of rubber or elastomer and are strategically placed around the combustion chamber openings.
They provide an additional layer of sealing and help prevent combustion gas leakage.
Advantages
- Enhanced sealing around combustion chambers.
- Improved resistance to combustion gas leakage.
- Suitable for engines with high compression ratios.
Applications
MLS head gaskets with integrated sealing rings are commonly used in engines where preventing combustion gas leaks is crucial, such as high-performance and racing engines.
Symptoms of a head gasket problem
There are ways to tell if your head gasket is damaged, and you need to invest in a sealer. Here are some things you should look out for:
#1. Engine misfiring.
If you feel a jerking motion when accelerating your car, you may have an engine misfire.
This is a result of your engine’s cylinder not firing, which causes a combustion reaction not to happen.
If this becomes frequent, you may have a blown or leaking head gasket.
#2. White smoke from your exhaust.
A leaking head gasket can lead to your coolant burning, resulting in white smoke from your car’s exhaust.
#3. Cooling system issues.
If you notice bubbles in the cooling system or your coolant has evaporated without seeing a leak, you may also be witnessing a blown head gasket problem.
#4. Car is overheating.
If the temperature warning light is illuminated on your dashboard or the hood of your car is hot to the touch, then your vehicle is likely overheating, which could be due to a head gasket issue.
While the above instances can point to other issues, it’s worth checking the head gasket if they’re happening. If it’s damaged, consider using a head gasket sealer.
Causes of Leaking Head Gaskets
Of course, you’ll want to avoid having a leaking head gasket in the first place. Here are two common causes behind your leaking head gasket:
#1. Overheating.
Overheating can lead to the cylinder head and other metal engine parts warping, which in turn can tear the head gasket and cause a leak.
To combat this, keep your vehicle’s cooling system well-maintained, and try to pull over as soon as you notice your vehicle suddenly heating up as you drive.
#2. Aluminum Components.
Certain engines are more prone to warped head gaskets. These engines often come equipped with aluminum block heads.
Because aluminum alloys are more sensitive to changes in temperature, they expand and contract much more than traditional cast iron.
Gasket punctures occur when the clamping force is low when the temperature is colder, so try to warm your engine up before driving if you can.
Now you know how to seal a head gasket leak with some sealer. While it does work, remember that head gasket sealer is only a temporary solution.
While it’s good for getting you out of a tight bind, it’s still best to use the time the sealer buys you to get your head gasket properly repaired.
Can we Reuse a Head Gasket?
The question of whether you can reuse a head gasket is a complex one. To answer this, we need to consider various factors and circumstances. Let’s explore the possibilities:
Factors to Consider
- Gasket Material: Head gaskets are typically made of various materials, including composite materials, metal, and even multi-layer steel (MLS). The material of the gasket can greatly influence its reusability.
- Gasket Condition: The condition of the head gasket after removal is crucial. If it’s in good shape with no visible damage, there may be a chance of reusing it.
- Engine Rebuild: If you’re planning a comprehensive engine rebuild, the decision to reuse a head gasket becomes more feasible, provided it meets certain criteria.
- Manufacturer’s Recommendations: Always consult the manufacturer’s guidelines for your specific vehicle and engine. Some engines may allow for reusing head gaskets, while others strictly advise against it.
How To Use Head Gasket Sealer
When using head gasket sealer, it’s best to follow the instructions on the packaging. Here are a few tips and tricks to make the process smoother, but check the instructions that come with the product to make sure you’re doing it right.
- Gather your materials ahead of time to avoid scrambling for them while working.
- Lift your vehicle on a jack to make it easier to drain the coolant from your radiator.
- Add water to the radiator.
- Remove your thermostat before using the head gasket sealer to avoid getting sealer on it.
- Turn on your vehicle and its heater to circulate the water and drain any remaining coolant. Drain the water as well in this step.
- Add a fresh coolant-water mixture little by little until you reach capacity.
- Slowly add the gasket sealer.
- Drive your vehicle around for 30 minutes to let the sealer spread through the vehicle. Allow it to sit unused for two to three hours afterwards.
- You can reinstall the thermostat once the sealant in the head gasket sealer is activated.
Pros And Cons Of Head Gasket Sealer
Head Gasket Sealer Pros
#1. Quick Fix.
You should use a head gasket sealer if your engine oil is leaking, to prevent your engine from overheating. This sealer provides an easy and quick leak fix to drive your vehicle back on the road.
These sealers assist in preventing leaks and engine damage. The head gasket sealers are most commonly used to stop the leakage of the head gasket. You may also use them for more preventive measures.
#2. Easy to Use.
One of the main advantages of the head gasket sealant is that it is easy to use. You just need to pour it into the engine and leave it to perform its magic.
#3. Head Gasket Sealer Provides Leak-free Seal.
The main pros of the head gasket sealer is that it provides an excellent and leak-free seal.
#4. Affordability.
If you are searching for a cheap sealant, you must choose a product like head gasket sealant. This product is planned in such a way that it repairs leaks and prevents oil from bleeding.
It is very easy to use. To use it, you just need to pour sealer into the engine by following the manufacturer’s instructions. The sealant seals leaks in ducts, valves, and hoses of the car.
The head gasket sealers also have the capacity to fix repair-related problems with air conditioners, fuel filters, water pumps, and the HVAC system of the vehicle.
The major pros of the head gasket sealer are that it helps to seal the leaks of your car’s air conditioning and water pump.
#5. Save your time.
A head gasket sealer is one of the best options to save you money and time. It helps to repair car engine leaks without a costly repair. With this sealant, you can immediately fix minor problems and prevent future car engine problems.
These sealers contain a mixture of methanol and polyvinyl acetate. When these components of the sealant mix together, a durable and hard film is generated that can last for a long time. You may use sealants for a variety of purposes, including:
- Tighten loose bolts of the engine.
- Use to stop the leak.
- Reduce the consumption of the cooling system oil required for the head gasket.
#6. Easily Available.
If the engine is overheating, you may need to add a head gasket sealant. These sealants are most commonly available at most auto supply stores.
These sealants help to prevent the engine from future damage. If you think that the car engine is overheating, put a drop or two of this sealant on the radiator cap.
Head Gasket Sealer Cons
#1. Head Gasket Sealer Produce Problems.
As we discussed above, the head gasket sealer is used to stop the leaks of the engine head gasket. This sealer is a mixture of different liquids.
As the engine gasket leaks, the sealant pours into the engine, which seals the leaking area and stops the leak. However, this sealer may also generate different problems.
The main disadvantage of the head gasket sealer is that it may create an overstressed or too tight seal.
Due to this overstressed seal, the engine water pump may pump water into the engine. This water may trap in the head gasket by virtue of the seal formed by the gasket sealant.
#2. Incompatibility.
The compatibility of the head gasket sealer with your car head gasket is very important.
If you don’t have to confirm whether your car is compatible with the gasket sealer or not, it is recommended that you should contact a mechanic before using this product.
If you notice an unpleasant odor or leak from the engine, you should consult your specialist to see if the leak is due to the gasket sealant.
If your car gasket sealer is leaking, you should change your head gasket. But if the sealant is incompatible with your vehicle, you should contact a specialist to remove this sealant.
#3. Malfunction in the Spark Plug.
The spark plug is very important in the case of a petrol engine. Without a spark plug, the petrol engine can’t combust the air-fuel mixture.
Your vehicle spark plug can fail if you use a head gasket sealer that comprises silicone. The reason for this is that the silicone may move into the electrode area of the spark plug and create a thin layer that may stop the spark from moving through the gap.
Therefore, after using the head gasket sealant, it is difficult to start the car. It can also wear out the spark plugs and cause premature engine failure.
#4. Limited Use.
The head gasket sealers are used for limited engines. These sealers are not compatible with all types of engines. It means you can use them for only specific engines.
#5. Radiator and Heater Core Clogging.
The main disadvantage of the head gasket sealer is that it may clog the heater core or radiator. If it clogs the radiator hoses, the cooling system of your car engine will not work properly, which may cause engine overheating.
The heater uses a heater core to transfer hot air inside the car. If the sealant clogs the heater core, the lines through which the heater core gets hot air will be clogged.
If the lines block, the heater can’t get hot air from the engine and can’t send hot air inside the car.
Advantages and Disadvantages of the Head Gasket Sealer
Advantages
- Easy to use.
- Low cost.
- Provide an outstanding seal.
- Fixes the leaks very quickly.
- These sealants are most commonly available in the market.
Disadvantages
- Not suitable for all engines.
- It may fail the spark plug of the engine.
- May produce over tight seal due to that the water pump may start to pump water into the engine.
- It may clog the heater core or radiator.
- It may block the water jacket or coolant line in the engine.
The Importance of Proper Maintenance
Whether you decide to reuse a head gasket or opt for a new one, proper maintenance of your engine is essential. Here are some tips to ensure the longevity and performance of your engine:
Regular Inspection
Ensure your head gasket is in good condition by periodically checking for leaks, damage, or wear and need to fix a head gasket leak. Early detection of problems can prevent costly repairs in the future.
Proper Torque
When installing a head gasket, follow the manufacturer’s torque specifications meticulously. Incorrect torque can lead to gasket failure.
Coolant Maintenance
Maintain your engine’s cooling system, ensuring it operates at the correct temperature. Overheating can put undue stress on the head gasket.
Quality Coolant
Use high-quality coolant that meets the specifications recommended by your vehicle’s manufacturer. Low-quality or improper coolant can lead to corrosion and gasket damage.
How Much Does A Head Gasket Cost?
Buying an aftermarket head gasket for your car is typically between $50 and $200 depending on where you get it from.
If you want to go back to stock, expect to pay at least $100 plus shipping. It all really depends on how much work needs to be done.
FAQs.
Q: Will Head Gasket Sealer Ruin An Engine?
No. If you use the right kind of head gasket sealer and apply it correctly, your vehicle engine is safe.
The particles of the sealer are so small that while they fix head gasket leaks, they do not interfere with the engine’s components. The caveat is that you must use a head gasket sealer from a trusted brand.
Q: Where Do I Put Head Gasket Sealer?
In the radiator. That is where it is designed to go into the engine. To get the most of the product in its can, pour it through the radiator cap. You could pour it directly through the coolant reservoir or the hose itself.
Q: Will Black Pepper Stop A Head Gasket Leak?
Yes. It will temporarily plug the head gasket leak. How? Ground black pepper has small particles that will move to wherever there is a leak in the head gasket. They then increase in size until they can plug the hole and keep the leak sealed.
A handful of ground black pepper is enough to prevent any head gasket leaks. However, it is in no way a permanent solution. Rather, it is meant to give you enough time to find a more lasting solution to the problem.
Q: Can You Use Blue Devil Head Gasket Sealer Twice?
Yes. You can use the blue devil head gasket sealer more than once. This product does not contain petroleum distillates, so you might use it more than once if a leak occurs after the last time you used it. You only need to follow the directions to the letter when applying it.
Final Words
So you might ask, what is the best head gasket sealer? Well, that all depends on your engine and the nature of the damage.
There are tons of head gasket sealers on the market all claiming to be the best solution to blown head gaskets. Deciding on what works best for you might be tricky but not impossible.
You’d need a good understanding of your engine so that you get to pick what works and what doesn’t. However, I recommend the blue devil head gasket sealer; it’s a nice product you need to try.
You might also get some help from tons of online reviews on head gasket sealers. At this juncture, you have seen the uses and pros, and cons of head gasket sealer and their applications.