GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual

Knocking Connecting Rods


When the connecting rod bearings are constantly making noise, check for the following, as necessary:

Misaligned connecting rod or cap.
Missing bearing shell or excessive bearing clearance.
Incorrectly torqued connecting rod bolts.
Connecting rod journal of the crankshaft is out-of-round.