Valve Lifter Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.

Fig 1: Identifying Valve Lifter Inspection Points
Courtesy of GENERAL MOTORS COMPANY

CAUTION:
Refer to Valve Lifter Priming Caution .

Inspect the hydraulic lash adjuster (HLA) in the following areas:
- A plugged oil passage (1)
- A scored or worn camshaft follower pivot area (2)
- A damaged or broken retainer (3), some applications
- A severely scuffed or worn HLA body (4)
Inspect the duel feed hydraulic lash adjuster (DFHLA) in the following areas:
- A plugged oil passage (5)
- A scored or worn camshaft follower pivot area (6)
- A damaged or broken retainer (7), some applications
- A severely scuffed or worn DFHLA body (8)
Replace the HLA or DFHLAs as necessary.