Lexus IS250 IS220d GSE20 ALE20 2AD-FHV LUBRICATION
OIL PUMP - INSPECTION
| 1. INSPECT OIL PUMP RELIEF VALVE |
Coat the relief valve with engine oil and drop it into the relief valve hole.
Check that the relief valve falls in smoothly by its own weight.
If it does not, replace the relief valve. If necessary, replace the timing chain cover.
| 2. INSPECT OIL PUMP |
Install the drive and driven rotors into the timing chain cover with the rotors' marks facing the cylinder block side. Check that the rotors revolve smoothly.
Check the tip clearance.
Using a feeler gauge, measure the clearance between the drive and driven rotor tips.
- Standard tip clearance:
- 0.180 to 0.300 mm (0.0071 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.
Check the body clearance.
Using a feeler gauge, measure the clearance between the oil pump body and driven rotor.
- Standard body clearance:
- 0.175 to 0.250 mm (0.0069 to 0.0098 in.)
- Maximum body clearance:
- 0.250 mm (0.0098 in.)
If the body clearance is greater than the maximum, replace the timing chain cover sub-assembly.
Check the side clearance.
Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge.
- Standard side clearance:
- 0.030 to 0.090 mm (0.0012 to 0.0035 in.)
- Maximum side clearance:
- 0.090 mm (0.0035 in.)
If the side clearance is greater than the maximum, replace the timing chain cover sub-assembly.