06-29-2005, 03:01 PM
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CC Member
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Join Date: Dec 2000
Location: Livermore,
CA
Cobra Make, Engine: ERA #629, BBM Side Oiler Block, 482ci, Richmond 5 speed
Posts: 853
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Not Ranked
I've tried Permatex at the slip fit connection on my headers/collectors. It lasted no more than 3 or 4 days before it burned away and/or blew out. The chunks that I found on the ground were clearly burnt. I think the temperatures of the pipes at the header/collector greatly exceed the 400 or 500 deg F intermittent rating on the high temp silicone sealers. I suspect that those that have had success with this method would have had the same success with no sealer at all (those with good flat surfaces).
Chris
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