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ryanheacox · 09-09-2019, 08:24 AM

My engine rebuilder said you want the crank to be able to rotate with minimal drag after line boring and final fitting of the mains. That made sense to me and I've had 1,200 trouble free miles so far.

I believe there is a page in the service bulletins about there being 0.004" of shims on the main bearings from the factory. I might be wrong on that so don't take it as fact.

I think when I pulled some rod shims on my old engine each lamination was 0.001" but it might be different for mains.

09-09-2019, 08:24 AM	#20
ryanheacox Senior Member Join Date: Apr 2013 Location: Northwest CT Posts: 1,092	Re: babbit tolerance? .000? My engine rebuilder said you want the crank to be able to rotate with minimal drag after line boring and final fitting of the mains. That made sense to me and I've had 1,200 trouble free miles so far. I believe there is a page in the service bulletins about there being 0.004" of shims on the main bearings from the factory. I might be wrong on that so don't take it as fact. I think when I pulled some rod shims on my old engine each lamination was 0.001" but it might be different for mains.