45. Valve Lifter and Guide Clean and Inspect
Valve Lifters and Guides Cleaning and Inspection1. Keep the valve lifters in order so they can be installed in their original position.
Important: When new valve lifters are installed, coat the valve lifters with camshaft and lifter prelube GM P/N United States 12345501, GM P/N Canada 992704 or the equivalent.
2. Inspect the following areas of the valve lifters:
- The retaining clip (1)
- The push rod socket for wear (2)
- The valve lifter body for wear and scuffing (3)
- The valve lifter bore for wear
- The valve lifter roller assembly for wear (4)
- The valve lifter roller pin for damage (5)
- The oil hole for plugging (6)
3. Inspect the valve lifter guides for cracks or damage.