Oil Pump: Inspection
- Inspect components for damage. Using straightedge and feeler gauge, measure gear end clearance. Measure housing pocket depth and diameter. Measure gear diameter and length (thickness). Measure side clearance between gear tooth and housing.
- Measure gear lash clearance between gear teeth. Check clearance between pressure regulator valve and bore. Replace components or entire assembly if not within specification. See OIL PUMP SPECIFICATIONS table.
OIL PUMP SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| Diameter | 1.503-1.505 (38.18-38.23) |
| End Clearance | .002-.005 (.040-.125) |
| Gear Diameter | 1.498-1.500 (38.05-38.10) |
| Housing Pocket Depth | 1.202-1.204 (30.52-30.58) |
| Lash Clearance | .0037-.0077 (.094-.195) |
| Length (Thickness) | 1.199-1.200 (30.45-30.48) |
| Pressure Relief Valve-To-Bore Clearance | .0015-.0035 (.038-.089) |
| Side Clearance | .001-.003 (.038-.088) |
NOTE:
Use only original equipment gaskets for oil pump service, as gasket thickness is critical.