Posted by bushnellman on June 07, 2016 at 09:48:29 from (72.128.208.89):
Hi, I'm working on rebuilding the engine of an old wc allis, this project was started 20 years ago by family member who didn't finish the job, anyway the reason I mention this is because the rod bearings were replaced at that time. Now I have restarted the job and I have found that I need to replace the main bearings, after some research ive found that the crank has been ground previously and has been stamped M 20 and R 20 with the letter R stamped underneath of those numbers. My measurments concur that the size is .020 smaller than original. my concern now is what bearings were put in for the connecting rods, my guess is that the original size bearings were installed meaning that these would be .020 too big. Can I verify this by putting the rod bearings in their holders and bolting them in without the crank being in the engine and then use a caliper to measure the I D of the bearing? see photo below
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