For 1990-2009 cars only
- Clean all the valve lifters in cleaning solvent.
- Dry all the valve lifters with compressed air.
- Inspect the active fuel management (AFM) valve lifters for the following:
- Inspect the AFM valve lifter guide for the following:
- Inspect the non AFM valve lifters for the following:
- Inspect the non AFM valve lifter guides for the following:
Important: If it is found that one or more of the active fuel management (AFM) lifters are not operating properly and needs replacing, replace all 6 AFM lifters and the lifter guide as an assembly.
Caution: Refer to Safety Glasses Caution in the Preface section.
| • | Worn push rod socket (1) |
| • | Scuffed or worn sides (2) |
| • | If the valve lifter shows wear, inspect the engine block lifter bores for wear or damage. |
| • | Flat spots on the roller (3) |
| • | Loose or damaged pin (4) |
| • | Plugged oil hole (5) |
| • | Broken or damaged spring (6) |
| • | Broken or damaged cup (7) |
| • | Worn or damaged roller bearing |
| • | The roller should rotate freely with no binding or roughness. |
| • | For cracks or damage |
| • | Excessive wear in the lifter mounting bores |
| • | Bent or broken clip (1) |
| • | Worn push rod socket (2) |
| • | Scuffed or worn sides (3) |
| • | If the valve lifter shows wear, inspect the engine block lifter bores for wear or damage. |
| • | Flat spots on the roller (4) |
| • | Loose or damaged pin (5) |
| • | Plugged oil hole (6) |
| • | Worn or damaged roller bearing |
| • | The roller should rotate freely with no binding or roughness. |
| • | For cracks or damage |
| • | Excessive wear in the lifter mounting bores |
