Caution: Wear safety glasses in order to avoid eye damage.
- Clean the oil pump components in cleaning solvent.
- Dry the components with compressed air.
- Inspect the oil pump for the following conditions:
| • | Scoring on the top of the gears (1) |
| • | Damaged gears (2) for the following: |
| • | Scoring, damage or casting imperfections to the body (3) |
| • | Damaged or scored gear shaft (4) |
| • | Damaged or scored gear shaft (5) |
| • | Damaged bolt hole threads |
| • | Worn oil pump driveshaft bore |
| • | Damaged or sticking oil pump pressure relief valve |
| • | Minor imperfections may be removed with a fine oil stone. |
| • | Collapsed or broken oil pump pressure relief valve spring |
- If the oil pump is to be reused, install a NEW oil pump pressure relief valve spring.
- During oil pump installation, install a NEW oil pump driveshaft retainer.
