Can detonation cause head gasket failure?

Asked By: Darcel Wischnewski | Last Updated: 13th February, 2020
Category: automotive auto repair
4.7/5 (84 Views . 45 Votes)
Yes. Detonation is another common cause of head gasket failure. Detonation causes a sharp spike in combustion chamber pressure, which over time can overload and crack the gasket armor that surrounds the cylinder. This leads to burn through and loss of compression.

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Consequently, can a blown head gasket cause detonation?

In general, blown head gasket causes can be divided into four main categories: Overheating. Preignition/detonation. Hot spots.

Subsequently, question is, what are signs of a blown head gasket? How To Tell if a Head Gasket Is Blown:

  • Coolant leaking externally from below the exhaust manifold.
  • White smoke from the exhaust pipe.
  • Bubbles in the radiator or coolant overflow tank.
  • Overheating engine.
  • White milky oil.
  • Fouled spark plugs.
  • Low cooling system integrity.

Subsequently, one may also ask, what causes head gasket failure?

The most common cause of a head gasket failure is engine overheating. When the engine gets too hot, the cylinder head expands (thermal expansion), which can crush the head gasket and cause failure.

Will a car always overheat with a blown head gasket?

The head gasket may fail in a way that the engine turns over but it won't start or struggles to start. A blown head gasket can keep your car from starting. When you have a blown head gasket, you may have no heat, no white smoke, no start, no check engine light or even no overheating in some cases.

29 Related Question Answers Found

Will head gasket sealer ruin an engine?

Not directly. But it could kill your engine VERY quickly, and that could put you in a bad place. Even if you only run it for 5 minutes at a time, a head gasket leak can cause coolant loss, oil loss, loss of both, and mixing of the two. Coolant diluted by oil does not properly cool your engine.

Is it worth fixing a blown head gasket?

Replacing or repairing an engine with a blown head gasket is a costly and time-consuming job and can take up to several days of work to get it done. It is still difficult and time-consuming labor, but it's still cheaper and faster than repairing the damage caused by the broken head gasket.

How does blown head gasket cause overheating?

A blown head gasket causes coolant to leak into the vehicle's engine, lowering the coolant levels while also overheating the engine.

Do head gasket sealers work?

A head gasket sealer works when you pour it into the radiator. You run the car for about 15 to 30 minutes, with the heater and fan on high. Then the special chemicals in the sealant work via heat. A real fix is to replace the head gasket, but this is costly.

How do you seal a blown head gasket?


There are many stop-leak products that are only designed to be a temporary fix, but not ours. A blown head gasket fix can be as easy as dumping a bottle of sealant in your radiator, and you're good to go. The seal created from our product is as permanent as replacing the head gasket, but with less money and time.

How long do head gaskets usually last?

To ensure the maximum life of a head gasket you must make sure that your engine and its cooling system is working well. If the engine is running cool and smooth, then the head gasket should last as long as the engine. In 2010, this means you may get 200,000 miles, or more than 10 years, out of that head gasket.

What does a thicker head gasket do?

Head gasket thickness will impact Compression Ratio.

How does it affect performance?
Thinner Head Gaskets Thicker Head Gaskets
Better sealing, less likely to blow Prone to failure, because it adds space between the head and block
Slightly raises compression ratio Slightly lowers compression ratio

How do you clean an engine after a blown head gasket?

How to Clean an Engine After a Blown Head Gasket
  1. Run the engine for one to two minutes.
  2. Change the engine oil and the oil filter.
  3. Replace the oil filter and replace the oil drain plug after all the old oil has drained.
  4. Drain engine coolant.
  5. Refill the radiator with coolant system flush, which can be purchased at most auto parts stores.

Does a blown head gasket leak oil?

Not only does a blown head gasket mean oil and coolant can leak inside the engine, it can even allow coolant to get into the oil system where they'll mix together.

Which Subaru's have head gasket problems?


These Subaru vehicles all have cylinder head gasket related issues: Impreza 1999 to 2011 Forester 1999 to 2010 Legacy 2000 to 2009 Outback 2000 to 2009 Baja 2003 to 2006 Reports of 2014 Forester gasket problems!

Can a bad thermostat cause a blown head gasket?

If your thermostat remains closed and stuck closed the coolant will not flow thru your radiator, resulting in increased engine temperature which results in overheating the engine. Blown head gaskets most of the time is caused by the cylinder head warping, not always mind you, sometimes the gaskets do give out.

Will black pepper stop a head gasket leak?

When black pepper is introduced into the system, the small particles travel to the leak where they expand and seal the leak. The pepper does not deteriorate and will seal the leak until you can get it fixed by a professional.

How does a gasket get damaged?

The biggest cause of a blown head gasket is overheating. Usually, the head gasket armor around the cylinders can become crushed, and if this happens, the seal is lost and your engine will lose compression, leak coolant, and the gasket will erode.

Has Subaru solved the head gasket problem?

Subaru has never fixed the headgasket problem. They continuously tell customers “Oh… thats a problem with the older models. They fixed it on the “insert model year here”.

Will Stop Leak fix a blown head gasket?


No, Bar's Leaks Head Gasket Fix will not clog your clean heater core, it is safe and effective. Note: If using Bar's Leaks Head Gasket Fix to stop heater core leaks, make sure you turn your heater control to HOT. Some vehicles have a valve that controls coolant flow through the core.

How can I fix my head gasket myself?

Part 1 of 4: Gather information and supplies
  1. Materials Needed.
  2. Step 1: Find the VIN.
  3. Step 2: Find a vehicle service manual for your car.
  4. Step 1: Disconnect the battery.
  5. Step 2: Drain engine oil and engine coolant.
  6. Step 3: Remove all components from the cylinder head.
  7. Step 4: Remove the fasteners in sequence.

Where is the head gasket located?

What is a Head Gasket? Located between the cylinder head and the engine block, you'll find the head gasket. This small yet vital component is used to seal the internal combustion process allowing coolant and oil to travel throughout the engine to cool and lubricate.