Oil Pump: Inspection
- INSPECT OIL PUMP RELIEF VALVE
- Coat the oil pump relief valve with engine oil
- Check that it falls smoothly into the valve hole by its own weight.
If it does not, replace the relief valve. If necessary, replace the timing chain cover assembly
- INSPECT OIL PUMP ROTOR SET
- Coat the oil pump rotor set with engine oil
- Install the rotors to the timing chain cover sub-assembly with the rotor marks facing outward Check that the rotors turn smoothly
- Check the tip clearance
- Using a feeler gauge, measure the clearance between the drive and driven rotor tips, as shown in the illustration
Standard tip clearance:
0.180 to 0.300 mm (0.00709 to 0.0118 in.)
Maximum tip clearance:
0.300 mm (0.0118 in.)
If the tip clearance is greater than the maximum, replace the timing chain cover sub-assembly
- Using a feeler gauge, measure the clearance between the drive and driven rotor tips, as shown in the illustration
- Check the side clearance
- Using a feeler gauge and steel square, measure the clearance between the rotors and steel square
Standard side clearance:
0.030 to 0.060 mm (0.00118 to 0.00236 in.)
Maximum side clearance:
0.060 mm (0.00236 in.)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the side clearance is greater than the maximum, replace the timing chain cover sub-assembly
- Using a feeler gauge and steel square, measure the clearance between the rotors and steel square
- Check the body clearance
- Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor, as shown in the illustration.
Standard body clearance:
0.175 to 0.250 mm (0.00689 to 0.00984 in.)
Maximum body clearance:
0.250 mm (0.00984 in.)
If the body clearance is greater than the maximum, replace the timing chain cover sub-assembly
- Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor, as shown in the illustration.