Exhaust Manifold Surfaces - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 06-19-2013, 06:17 PM Thread Starter
 
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Exhaust Manifold Surfaces

I took off the right side exhaust manifold on my 71 GTO today since it was leaking like a blown gasket. The gasket had no breaks but I did notice an area on the twin ports that was slightly depressed and the gasket looked like it leaked from there. The pictures below show the depression. I don't know if it can be milled out or I need to replace the manifold. I considered putting in headers but the cost is way to high for me to handle right now. Suggestions?
Larry in Simsbury CT
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post #2 of 3 (permalink) Old 06-19-2013, 11:22 PM
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Garage
Try some of these:

PONTIAC Header Exhaust/Manifold Gasket

They're thick graphite and can adapt to surface imperfections like that. You could also try stacking multiple regular gaskets, but that's less "definite".

Bear

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post #3 of 3 (permalink) Old 06-20-2013, 09:48 AM
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Take it to a machine shop and they can mill a few mm off and get you a true flat surface.
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