Oil Pump: Inspection
- INSPECT OIL PUMP RELIEF VALVE
- Coat the relief valve with engine oil and check that it falls smoothly into the valve hole under its own weight.
If it does not, replace the relief valve. If necessary, replace the oil pump assembly.
- Coat the relief valve with engine oil and check that it falls smoothly into the valve hole under its own weight.
- INSPECT OIL PUMP ROTOR SET
- Install the rotors to the timing chain cover with the rotors' marks facing outward. Check that the rotors revolve smoothly.
- Check the tip clearance.
- Using a feeler gauge, measure the clearance between the drive and driven rotor tips, as shown in Fig 3.
Tip clearance
DRIVE ROTOR TIPS CLEARANCEStandard Maximum 0.060 to 0.160 mm (0.0024 to 0.0063 in.) 0.16 mm (0.0063 in.) If the tip clearance is greater than the maximum, replace the drive and driven rotors.
- Using a feeler gauge, measure the clearance between the drive and driven rotor tips, as shown in Fig 3.
- Check the side clearance.
- Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge, as shown in Fig 4.
Side clearance
DRIVE ROTOR SIDE CLEARANCEStandard Maximum 0.030 to 0.090 mm (0.0012 to 0.0035 in.) 0.090 mm (0.0035 in.) If the side clearance is greater than the maximum, replace the timing chain cover.
- Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge, as shown in Fig 4.
- Check the body clearance.
- Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor, as shown in Fig 5.
Body clearance
BODY CLEARANCEStandard Maximum 0.250 to 0.325 mm (0.0098 to 0.0128 in.) 0.325 mm (0.0128 in.) If the body clearance is greater than the maximum, replace the timing chain cover.
- Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor, as shown in Fig 5.