Connecting Rod Bearing

CONNECTING ROD JOURNALS





SELECT FIT ROD BEARINGS





1. Connecting rod bearings use select fit to achieve improved clearance control. On a new engine, the crankshaft journal is gaged to use a specific bearing size. The grade is indicated on the #9 counterweight (2) of the crankshaft and listed from left to right with the recommended size.




How to Determine Rod Bearing Class





This example shows how to determine the bearing class needed for each rod bearing, assuming that a new crankshaft is being installed in a new or existing engine block. If the code 'B' 'A' 'B' 'B' 'B' 'C' is stamped on the #9 counterweight of the crankshaft (3), then rod #1 would require Class 2 bearings, rod #2 would require Class 1 bearings, rod #3 would require Class 2 bearings, rod #4 would require Class 2 bearings, rod #5 would require Class 2 bearings, and rod #6 would require Class 3 bearings.