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