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Main bearing & rod bearing journal clearances for 440..

Posted By: Blakcharger440

Main bearing & rod bearing journal clearances for 440.. - 11/14/08 04:19 PM

I am getting ready to use some plastigauge in determining how much clearance I have at the main and rod journals.

What parameter of clearance would be good for the mains and what would be good for the rods?

These should always be checked dry correct?

This is for a standard bearing size 4.25 stroke RB crank
Posted By: MoparforLife

Re: Main bearing & rod bearing journal clearances for 4 - 11/14/08 04:21 PM

We never to go over .002 on either the rods or mains. Never had a problem with those clearances on the engines we run on the street or strip.
Posted By: RapidRobert

Re: Main bearing & rod bearing journal clearances for 440.. - 11/14/08 04:34 PM

Quote:

These should always be checked dry correct?


yes both bearing halves/journal dry & be careful when you set the crank down that you dont rotate it & I always grab a helper to eyeball things underneath so the crank goes down where it's supposed to & doesn't get nicked.
Posted By: moper

Re: Main bearing & rod bearing journal clearances for 440.. - 11/14/08 05:28 PM

.002-.0025 on mains, .0025-.003 on rods. I have gone tighter before... I never go bigger.
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