Oil Pump: Inspection
- Inspect components for damage. Install inner and outer gears in front cover. Using feeler gauge, measure outer gear-to-front cover clearance. Replace front cover if clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.
- Measure gear tip clearance between tip of inner gear and outer gear. Replace gear set if clearance exceeds specification.
- Place straightedge across front cover above both gears. Measure inner and outer gear end clearance between straightedge and surface of both gears. Replace front cover if clearance exceeds specification.
- Measure outside diameter of raised area on inner gear. See Figure . Measure inside diameter of front cover where raised area on inner gear fits. Subtract raised area diameter from front cover diameter to determine inner gear-to-front cover clearance. Replace front cover if clearance exceeds specification.
- Ensure regulator valve slides freely in oil pump cover bore. Measure regulator valve O.D. and oil pump cover bore I.D. Replace oil pump cover if regulator valve-to-oil pump cover clearance exceeds specification. See OIL PUMP SPECIFICATIONS table.
OIL PUMP SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| Gear Tip Clearance (Maximum) | 0071 (.180) |
| Inner Gear End Clearance | .0020-.0035 (.051-.089) |
| Inner Gear-To-Front Cover Clearance | .0018-.0036 (.046-.091) |
| Outer Gear End Clearance | .0020-.0043 (.051-.109) |
| Outer Gear-To-Front Cover Clearance | .0045-.0079 (.114-.201) |
| Regulator Valve-To-Oil Pump Cover Clearance | .0016-.0038 (.041-.097) |