jhall Posted January 9, 2005 Report Share Posted January 9, 2005 Hi guys, Continuing work on my '97 Deville N* engine and have a question. While cleaning the case gasket surfaces, I noted that the outside portion of the grove that holds the case gasket has a black rubber-like surface. Some has peeled off, but some parts appear to be a more permanent part of the groove. Has anyone seen this? Is it from the GM gasket maker that was used when the engine was assembled?? Hope this won't be a problem. Maybe some high temp sealer can repair the damaged sections of the black stuff if it's needed to help the case seal work? FYI - The engine has 130K on it. I checked the main bearing clearances today with plasti-gauge. Believe it or not, the main bearing clearances are still in spec (between 0.0015 and 0.002). I am amazed! See attached pic. Getting ready to start a thorough check of the valves and valve seals. I was experiencing slight puffing at start-up, but not sure if the valve seals were the cause. Hopefully they will be OK and Timeserts will be the next order of business Link to comment Share on other sites More sharing options...
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