Quite likely your surfaces are not flat. If the pipe lays flat against the head, the gasket will hold tight. However, if they do not lie flat, one side will be tight against the head and the other will be a bit loose, but not enough that you could easily see it. Under the higher pressures of high RPMs, this gap will be exploited until it fails. Likewise, you could simply have a low spot on the surface of the pipe. When you next replace the gasket, file the pipe flat first, and scrape and smooth the head surface as well. Z -----Original Message----- From: Cookson, Noel [mailto:ncookson@CELOXNETWORKS.COM] Sent: Monday, November 05, 2001 9:54 AM To: vanagon@GERRY.VANAGON.COM Subject: #1 cylinder header pipe gasket burning out
Hi, I have a recurring problem with the gasket for the #1 cylinder header pipe. This gasket fails after running the car at highway speeds for an hour or more. Around town use has not caused a problem. I have replaced this gasket twice now and even doubled it up to try to accommodate any warping that might occur as things heat up. Has anyone else seen this problem? Is there another/better gasket I should look for? Noel 88 GL |
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