Oil Pump: Inspection
- Inspect components for damage. Coat relief valve with engine oil. Ensure relief valve slides freely in valve bore. Install drive and driven rotors in oil pump body. Ensure both rotors are installed in oil pump body with identification mark (triangle mark) facing oil pump cover.
- Using feeler gauge, measure driven rotor-to-oil pump body clearance. Replace rotor assembly or oil pump assembly if clearance exceeds specification. See OIL PUMP SPECIFICATIONS .
- Measure rotor tip clearance between tips of rotors. Replace rotor assembly if clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.
- Place straightedge across oil pump body, above both rotors. Measure rotor end clearance between straightedge and surface of each rotor. Replace rotor assembly or oil pump assembly if clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.
OIL PUMP SPECIFICATIONS
| Application | In. (mm) | |
|---|---|---|
| Driven Rotor-To-Oil Pump Body Clearance | ||
| Standard | .0039-.0069 (.099-.175) | |
| Wear Limit | .0118 (.300) | |
| Rotor End Clearance | ||
| Standard | .0012-.0035 (.030-.090) | |
| Wear Limit | .0059 (.150) | |
| Rotor Tip Clearance | ||
| Standard | .0043-.0094 (.110-.240) | |
| Wear Limit | .0138 (.350) | |