Micrometer Method for Connecting Rod Bearings
WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Important: When bearings are removed, NEW bearings must be installed during reassembly.
- Measure the crankpin diameter with a micrometer in several places along the length, approximately 90 degrees apart, minimum of 4 places, and average the measurements.
- Determine the taper and the out-of-round. Refer to Engine Mechanical Specifications .
- Install the NEW connecting rod bearings into the connecting rod cap and the connecting rod.NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Important: Use the original connecting rod nuts for clearance measurement. During final assembly new connecting rod nuts must be used to obtain correct fastener tightening.
- Install the connecting rod cap and the original, used, nuts.
Tighten
Tighten the connecting rod nuts to 30 N.m (22 lb ft). Tighten the connecting rod nuts an additional 90 degrees.
- Measure the connecting rod bearing inside diameter (ID) using an inside micrometer.
- Compare the connecting rod bearing clearance specifications. Refer to Engine Mechanical Specifications .
- If the connecting rod bearing clearances exceed specifications, replace components as required.