389 head gasket problem - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 06-04-2013, 08:18 AM Thread Starter
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389 head gasket problem

I have a 64 GTO 389 tri power.Motor has complete rebuild .060 over decked crack checked I have blown 2 head gaskets on the right side in less than 200 miles??? I do however have a header tapping on a cross member on this side. Could that cause a blown head gasket??? Thanks getting frustrated...
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post #2 of 3 (permalink) Old 06-04-2013, 09:10 AM
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No a header tapping on the cross member won't cause a head gasket to blow. If the block and head both are totally flat, I would replace the head bolts on that side and use a product like "Copper Coat" on both sides of the gasket.
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post #3 of 3 (permalink) Old 06-04-2013, 09:28 AM
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I suspect the machine work. Remove the head and check the block and head for trueness with a real straight edge.
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