Quote:
Originally Posted by BRENT in 10-uh-C
As mentioned above, there are bad experiences with these gaskets however it is not the gasket's fault ...but instead is the mechanic. You cannot install these on surfaces with a rough finish. I have used these with great results. If your head and block decks have a RA finish of 50 or less, then these gasket seal well.
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I was unaware of the requirements for finish quality, but it certainly makes sense. In my case it was a freshly decked head and a freshly stoned block but still leaked. Replaced with the copper-treated graphite and no issues.
Jim Brierley makes a good point. If you use the copper spray on the graphite gasket it does stay tacky and is a bear to remove. I've had to pull heads twice after installing that way and the graphite gaskets split down the middle, had to scrape both the head and the block. Copper gasket is definitely easier to remove. On the other hand, hopefully when we install a head gasket it's for keeps.