For 1990-2009 cars only
- Inspect the following for excessive wear or damage:
- Measure the radial clearance between the oil pump outer gear and the oil pump body using a feeler gage.
- Measure the side clearance between the oil pump gears and a straightedge using a feeler gage.
- Measure the free length of the oil pressure relief spring.
- Measure the oil pressure relief spring tension.
Important: If the oil pump is found to be damaged or excessively worn replace the oil pump as an assembly.
| • | The oil pump outer gear |
| • | The oil pump inner gear |
| • | The oil pump cover |
| • | The oil pump body |
Replace the oil pump if the clearance exceeds 0.15 mm (0.0059 in).
Replace the oil pump if the clearance exceeds 0.11 mm (0.0043 in).
Replace the spring if the free length is less than 63.5 mm (2.5 in).
Replace the spring if the tension is less than 86.0 Newtons at 52 mm (62 lb at 2.05 in).
