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Old 08-12-2023, 01:25 AM
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Verdoro 68 Verdoro 68 is offline
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Join Date: Jun 2003
Location: Clayton, CA
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Dropped the crank off today to get checked out. The machinist thinks it will clean up with a polish and said I can likely use the same size bearings. He's going to smooth over the serrations too. New rod and main bearings are on the way from Summit. I'll measure everything again when I get the parts and see where the clearances fall. Fingers crossed.

His assessment of the seal failure is similar to everyone else's - too much pressure and friction on the seal. He said the line bore on my block might have some issues given the way my main bearings are worn, but he doesn't think it had anything to do with the seal failing.

I spent most of the afternoon tediously fitting the BOP one piece seal. I had to sand quite a bit off the outer diameter to remove the pucker at the seam. I assume that's due to the line bore on the block. The spring steel is starting to show around the edges but Wade said that's ok - just be sure to use a film of sealer when it's installed. I think it's looking about a seamless as I can get it without taking too much off.

I'm measuring 3.16 at the ID of the seal across the middle with the cap torqued. The crank measured 3.188 which should put me within the overlap tolerance the seal calls for of .025 +/- .005 - provided too much doesn't get taken off the crank.





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'68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac (build thread | walk around)
'74 Ventura 350
'69 AMC Javelin SST
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