jhall Posted January 6, 2005 Report Share Posted January 6, 2005 bbobnyski, I went back and checked the rear main on my '97 Deville and I don't see the "inner race" you mentioned in the previous post. The seal lip is riding directly on the shaft. After a closer look, it appears the seal has a slight leak at seal body to block interface near the bottom of the seal. I don't think this is the teflon seal / inner race you described. It seems I should go ahead and replace it. Sound logical?? The main bearings exhibit wear patterns and the 4th bearing has a score mark through the center. It looks like I need to go ahead and pull out the crank and replace the bearings. I'll post another pic of the bearings. I'd like to get some input before I bust out the crank. I don't see any scoring on the crank, but I did note that the secondary cam gear and shaft are worn with some light scoring on both. I went back and checked the micrometer readings on the cylinder bore. I was reading the thimble numbers wrong. I remeasured and and guess what? Readings are right on the original bore diameters. I also looked at the piston skirts when they were at BDC. You were right again....the original machining marks are still present. Link to comment Share on other sites More sharing options...
jhall Posted January 6, 2005 Author Report Share Posted January 6, 2005 bbobynski, Thanks again! To clarify, the secondary cam gear is not worn, but there are score marks on the internal bearing and the secondary shaft. The gear has up/down movement on the shaft. I need to mic these to see how they really look. I'll send a pic this evening. I've zip-tied the chains on the cam gears (on the head) to keep the roller / gear relationship the same so a new wear pattern is not started (might seem a bit anal, but I'd kick myself if it gave problems after reassembly). These look fine. Link to comment Share on other sites More sharing options...
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