Head Gasket work preventable?
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Join Date: Sep 2008
Location: Arlington, VA/ Baltimore, MD
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Oh I think they fail without an overheating incident. I've seen it happen to an engine I put every mile on so I know it never overheated. HG at around 120k on the factory replacement 4.6 if I recall correctly.
Otherwise to answer your question I would guess it is a solid 80% probable no matter what you do.
I have no experience with fresh HG's on an inline stat so I'll reserve judgement on that setup.
Otherwise to answer your question I would guess it is a solid 80% probable no matter what you do.
I have no experience with fresh HG's on an inline stat so I'll reserve judgement on that setup.
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If the engine is not overheated, which can warp the heads and lead to head gasket failure, I'd say the head gaskets can last indefinitely, although they may fail eventually.
The head gaskets are very, very narrow at the rear of the heads where the water passages are. Maybe 1/8" to 3/16s"? That's a very small span that is very frequently the location of a head gasket failure.
The precaution is to keep an eagle eye on the coolant temp, and to not allow the engine to run for any sustained period at elevated temps (e.g. above 230°F).
And to answer the subsequent question that was not asked, I see no reason to replace head gaskets proactively.
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Richard Gallant (06-22-2021)
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