Join Date: Aug 1998
Location: Waldorf Md. USA
Re: rod bearing part number
I dont use very many King bearings but Clevite has their CB743HN available in .009 under-size which I believe would give you an extra .001 clearance.
That being said . . . . I have never had any luck checking rod clearances with plastigage. Things just move around too much and I don't see how you can torque the bolts without mashing the plastigage too much. I would take one of your rod and piston assemblies to your machine shop torqued together and have them measure the bearing id with a good bore gauge like the one on a Sunnen Rod Hone.
The other thing you can try is put one rod and piston in and leave it loose. Slide a .002: feeler gauge in between the bearing and the crankshaft and then tighten the rod bolts. If you can pull the .002 feeler gauge out then you know you have at least .002" clearance. This will at least give you an idea whether the plastigage is telling the truth.
Advanced Automotive Machine
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