Anyone? KA rod bearings.

[andrewhuffman]

So nissan uses he grading system for bearings... In the FSM, it says the main use grades, and rods use grades.

Now, nissan offers a STD size on the main, and individual grades for the rods.

1st, is the nissan STD set good for them mains?2nd, how can i tell what grade i need? One side has the rod number, on the other side of the rod/cap, there is a 5, 2, 0. what number am i looking for?

[eazye2000]

Not sure if this helps, but here it goes.

I had my crank mic'd and micro polished. Looked good to order some standard sized rod and main bearings. I called AMS and ordered bearings along with rods and such from them. I didn't recall reading about anything with the grades/colors/numbers thing. I thought that was only on the SR's?

Anyways, there's some personal info.

[andrewhuffman]

thanks for the reply... when using aftermarket rods, that goes out the window. And if material is taken off the crank, it goes out the window. I may just have the crank polished to match std bearing.

[480sx]

You buy your 'grade' of rod bearing by thickness, or clearances. Its best to bring your block to a machine shop and mic it out, then recommend one of the 3 different bearings.

I think somewhere in the FSM it tells you how to read the crank for that, but if your using a used crank you really should have it measured to make sure clearances are optimal.

Thicknesses of std size rod bearings available. Grade 0 - .0593-.0594 (in)Grade 1 - .0594-.0595Grade 2 - .0595-.0596