Connecting Rod and Bearings
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Important: The powdered metal connecting rod and cap are machined for the proper clearances. The connecting rod and the cap must be used as an assembly with no repair or modifications to either mating surface.
Do not attempt to repair the connecting rod or the cap mating surfaces. If service is required, the connecting rod and the cap must be replaced as an assembly.
- Clean the connecting rod and the cap in solvent.
Important: Replace the connecting rod if the bolt hole threads are damaged. Do not attempt to repair the bolt hole threads of the connecting rod.
- Clean the connecting rod threaded bolts holes.CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
- Dry the connecting rod with compressed air.
- Inspect the connecting rod for the following:
- Twisting
- Nicks or gouging in the bearing bore
- Damage to the bearing locating slots in the bearing bore
- Proper fit of the connecting rod and the cap mating surfaces
- Measure the connecting rod bearing bore for out-of-round.
If the measurement exceeds 0.008 mm (0.0003 in), replace the connecting rod assembly.
- Inspect the connecting rod bearings for craters or pockets. Flattened sections on the bearing halves also indicate fatigue.
- Inspect the connecting rod bearings for excessive scoring or discoloration.
- Inspect the connecting rod bearings for dirt or debris imbedded into the bearing material.
- Inspect the connecting rod bearings for improper seating indicated by bright, polished sections of the bearing.