For 1990-2009 cars only
- Check the oil jet (1) for damage or clogging. If necessary, repair the cylinder block.
- Check the relief valve.
- Coat the valve with engine oil, and then check that the valve falls smoothly into the valve hole by its own weight.
- Check the side clearance.
- Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge.
- Check the tip clearance.
- Using a feeler gauge, measure the clearance between the drive and driven rotor tips.
- Check the body clearance.
- Using a feeler gauge, measure the clearance between the driven rotor and pump body.
If it does not, replace the relief valve. If necessary, replace the oil pump assembly.
If the side clearance is greater than the maximum, replace the oil pump assembly.
Specification
| • | Standard Clearance: 0.030 to 0.085 mm (0.0012 to 0.0034 in) |
| • | Maximum Clearance: 0.160 mm (0.0063 in) |
If the tip clearance is greater than the maximum, replace the oil pump assembly.
Specification
| • | Standard Clearance: 0.080-0.160 mm (0.0031-0.0063 in) |
| • | Maximum Clearance: 0.35 mm (0.0138 in) |
If the body clearance is greater than the maximum, replace the oil pump assembly.
Specification
| • | Standard Clearance: 0.100-0 0.170 mm (0.0039-0.0067 in) |
| • | Maximum Clearance: 0.325 mm (0.0128 in) |
