In your opinion What causes head gaskets to blow

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In your opinion What causes head gaskets to blow

Post by littlebeaver » Sat Jun 18, 2011 12:43 am

My gaskets are fine but after reading so many stories of guys changing their head gaskets out I was wondering what the main cause could be, Heat perhaps??? Age, What????

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Re: In your opinion What causes head gaskets to blow

Post by eklimek » Sat Jun 18, 2011 7:57 am

heat and pressure.

Gaskets separate mating surfaces and the edge is intermittently bathed with high temperature and pressure flame. Slight deformation with overheating or faulty installation allows penetration into mating surfaces. O rings may retard penetration and erosion ( see Space shuttle disaster 1986). Erosion permits oil contamination and coolant loss. Bearing surface failure results.

"Temps can be close to 3600 deg f away from surfaces. Surfaces however are kept cool by the engines cooling system and the fact that the burning mostly takes place in only 1 of the four strokes. Exhaust manifolds can reach temps of over 1800 deg. f"

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