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How do you repair a blown head gasket in 1998 gmc sierra with V8 5.7 engine?
Wiki User
∙ 15y ago
Remove both heads, take them to a reputable machine shop and have the heads "shaved" (milled, machined... whatever they call it in your area) to make them flat again.
Note that when a head overheats it warps sligtly, causing the gasket between the head and the block to blow. Don't even try to replace the gasket without having the head reconditioned.
If the engine is relatively new you won't need to have much done to the valves, but it wouldn't be a bad idea to do the seals if the shop suggests it.
Reassemble the engine using new gaskets, and take care torquing the heads back on, following manufacturers recommendations.
The worst part is removing all of the peripheral jumk that is in the way.
Wiki User
∙ 15y ago
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