Question about 1997 GMC Sierra

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Intake manfold leaking antfreez

Intake manfold leaking antifreeze

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  • purplepwr138 Sep 29, 2009

    intake manfold leaking antifreeze

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Is it leaking between wear the head and intake mate together? If so you can try retorqing the bolts and see if it stops other wise you will have to replace the intake gasgets.

Posted on Sep 29, 2009

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I am assuming that you have an external leak at the manifold area, though it could also be internal. This was an issue and in 2004 GM redesigned the intake gaskets to address this issue. I have also seen manifolds warped and or rusted, but that is rare. Ask for the updated gaskets at your local parts store.

Posted on Sep 29, 2009

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1 Answer

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Intake manfold vacuum leak , maybe ! Seen this a few times . gaskets contract cold allowing a leak then heat up an seal up the leak . There are a coulpe videos on youtube .

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1 Answer

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Check that the antifreeze is coming from either a freeze plug which is round and about 1-3/4" in diameter, or the head gasket.

If it's a head gasket, it will have to be replaced.

If it's a hose leading to the intake gasket area, replace that part.

If it's a freeze plug, then a rubber expanding one (with a screw in adjuster) may substitute for the original metal one.

Good luck on this repair.

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It wants to red line after I start. This happened


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1 Answer

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