Engine Valley Cover Cleaning and Inspection
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:
- Do not use the valley cover knock sensor oil seals again. Install NEW oil seals during assembly.
- Do not use the valley cover gasket again. Install a NEW gasket during assembly.
- Remove the knock sensor oil seals (1) from the valley cover (2).
- Clean the valley cover in solvent.CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
- Dry the valley cover with compressed air.
- Inspect the gasket sealing surfaces for excessive scratches or gouging. Refer to REPLACING ENGINE GASKETS .
- Inspect the valley cover oil seal bores for excessive scratches or gouging.