Re: Crank bearings

Posted by Opa A on January 11, 2005 at 17:25:06 from (161.184.52.34):

In Reply to: Crank bearings posted by CNKS on January 11, 2005 at 10:00:41:

Measuring clearance with worn bearings and plastigage will not tell you whether the wear is in the crank lournal or the bearing shell. If the bearings are original they will have the wear as they are much softer than the crankshaft. Someone may have already replaced the bearings and then you would have to suspect more journal wear. Most bearing manufactures stamp the bearing date in the back of the shell, as well as dimension, STD, 0.010, etc, this can be a good indication of service life. I've often done 3 to 4 bearing rolls in one engine before the crank needed work. Measure the crank, and if the results are within specs (specs may already be a standard undersize) and you can't feel any grooves with your finger nail I'd just install new bearings and run it. I remember doing an engine in a Case W14 loader and the guys that work on the all the time advised me that if I had the crank turned 0.010 under it would break within 500 hrs, (only engine I've ever seen with that weak of crank). Just the same I don't like to undersize a crank unless needed.

Follow Ups:

• Re: Crank bearings Opa A 17:31:21 01/11/05 (0)

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