Cleaning Procedure
- Clean the oil pump components with non-corrosive solvent.
Caution: Refer to Safety Glasses Caution in the Preface section.
- Dry the oil pump components with compressed air.
Inspection Procedure
Important: There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must not be reused. A disassembled oil pump must be replaced.
- Inspect the oil pump housing for the following:
| • | Damage, scoring, or debris on the housing surface for the driven gear (1) |
| • | Damage to the oil pump mounting bosses (2) |
| • | Damage, scoring, or debris on the housing surface for the drive gear (3) |
| • | Damage, scoring, or debris in the oil pump relief valve port (4) |
| • | Damage, scoring, or debris in the oil pump intake port (5) |
| • | Damage, scoring, or debris in the oil pump relief valve bore (6) |
| • | Damage, scoring, or debris in the oil pump output port (7) |
| • | Damage to the threads in the oil pump housing for the oil pump cover bolts (8) |
- Inspect the oil pump cover for the following conditions:
| • | Damage to the oil pump cover mounting bosses (1) |
| • | Damage, scoring, or debris in the oil pump cover oil passages (2) |
| • | Damage to the sealing surface between the oil pump cover and the oil pump housing (3) |
- Inspect the inner drive gear for damage. If inner diameter
damage is found, ensure the crankshaft is also inspected.
- Inspect the outer driven gear for damage.
- Inspect the oil pump relief valve components
for debris or damage.
- Inspect the primary camshaft drive chain lower guide
for damage (1-3).
- If debris or damage is present within the oil pump, further inspection of all of the engine components is necessary.
