Oil Pump & Front Cover: Inspection
- Inspect components for damage. Install oil pump gears in front cover. Using feeler gauge, measure gear-to-front cover clearance between tip of teeth on each gear and front cover.
- Place straightedge across front cover above oil pump gears. Using feeler gauge, check gear side clearance between straightedge and both oil pump gears. Check for ridge on oil pump cover in gear operating area. Ensure relief plunger slides freely in bore. Check free length and pressure of relief plunger spring. See OIL PUMP SPECIFICATIONS table. Replace components if free length and pressure are not within specification.
- On turbo models, ensure oil cooler by-pass valve slides freely. At normal room temperature, measure distance from valve body to tip of valve. See Fig 1 . Distance should be 1.358" (34.50 mm). Heat oil to 212°F (100°C), and submerge valve in heated oil for a few minutes. Remove valve, and measure distance from valve body to tip of valve. Distance should be at least 1.57" (40.0 mm). Replace valve assembly if distance is not as specified.
OIL PUMP SPECIFICATIONS
| Application | Specification | ||||
|---|---|---|---|---|---|
| Gear Side Clearance | |||||
| Drive Gear | |||||
| Standard | .0031-.0055" (.080-.140 mm) | ||||
| Limit | .0098" (.250 mm) | ||||
| Driven Gear | |||||
| Standard | .0024-.0050" (.060-.120 mm) | ||||
| Limit | .0098" (.250 mm) | ||||
| Gear-To-Front Cover Clearance | |||||
| Drive & Driven Gear | |||||
| Standard | .0024-.0050" (.060-.120 mm) | ||||
| Limit | .0080" (.200 mm) | ||||
| Relief Plunger Spring | |||||
| Free Length | 1.835" (46.60 mm) | ||||
| Spring Pressure (1) | 13.4 @ 1.579 (6.1 @ 40.10) | ||||
|
|||||