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brandan

Why do head Gasktes fail?

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What are the common reasons for the failure of head gaskets?

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Well, i know three points:

 

1. Design issues: When the gasket design is not as per the specification of the vehicle, they tend to fail

2. Installation: When there is any mistake in installing the head gasket in the engine, they will surely fail in the near future.

3. Leaking: If there is coolant leak, head gasket are mostly affected by it and the internal coolant leak is abserved in the same. So thats also one reason, why they fail.

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Overheating is a main cause. Causes the cylinder head and block to warp if it's aluminium. The gasket can't do it's job properly if the two surfaces it's supposed to seal aren't flat.

I see a lot of gaskets fail because they corrode due to the system being filled with tap water instead of proper coolant or the correct coolant mixture. Coolant has corrosion inhibitors to stop this from happening while plain water speeds up the corrosion process. This is especially true on cars with aluminum engines.

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