I used a feller gauge and .005" my rod card said .015"-025" I called the machine shop that sold me the parts and balanced them he said that with a feller gauge it would be tigher than it really is he said mic the rods togerher and use telescoping gauges to measure the crank and subtract the 2 and what you have left is what it is this the right way or is he just Blowing smoke up my *** to save himself some work ... If it is too tight can I get chamfered bearings to make the extra clearence? Thanks for the help Sean ...

 

The rods themselves determine the clearance, not the bearing shells. Just make sure the bearing radius will clear the journal radius. Either way is acceptable. The goal is to get accurate readings. For the average person, feelers are easier to use. It is more difficult to use a telescope gage or calipers accurately for checking the journal width. Aim for the low side of the clearance tolerance. This clearance determines the amount of oil thrown off rod journal.

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He's right about how to measure. I am not sure what to recommend if the clearance is too large but can find out if nobody else posts the answer. Obviously, if it's too tight the rods can be machined for more clearance.

Rich Krause

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'95 Z-28 383: Vortech, nitrous, etc.
AIM: rstevenkrause

 

I know they are too tight #1-2 rods were .005" with a feller gauge. But I think the guy at the machine shop is trying to get out of work and saying it is fine the specs are .015"-.025" I know I can have them filed down for more clearance but didnt know if chamfered berings would help any... Thanks for the info ...

 

Just put a bearing shell on the journal to see if it clears the radius. BTW, there is a shoulder side to the bearing shell. (larger chamfer)

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