Oil Pump: Testing and Inspection

2AZ-FE LUBRICATION: OIL PUMP: INSPECTION

INSPECTION

1. INSPECT OIL JET





(a) Check the oil jet for damage or clogging.
If necessary, repair the cylinder block.
2. INSPECT OIL PUMP RELIEF VALVE





(a) Check the relief valve.
(1) Coat the valve with engine oil, and then check that the valve falls smoothly into the valve hole under its own weight.
If the valve does not fall smoothly, replace the relief valve. If necessary, replace the oil pump assembly.
3. INSPECT OIL PUMP ROTOR
(a) Install the oil pump rotor.




(1) Coat the drive rotor and driven rotor with engine oil.
(2) Place the drive and driven rotors into the oil pump with the marks facing the pump cover side.





(b) Check the side clearance.
(1) Using a feeler gauge and precision straightedge, measure the clearance between the rotors and precision straightedge.
Standard clearance:
0.030 to 0.085 mm (0.0012 to 0.0033 in.)
Maximum clearance:
0.16 mm (0.0063 in.)
If the side clearance is greater than the maximum, replace the oil pump assembly.





(c) Check the tip clearance.
(1) Using a feeler gauge, measure the clearance between the drive and driven rotor tips.
Standard clearance:
0.080 to 0.160 mm (0.0031 to 0.0063 in.)
Maximum clearance:
0.35 mm (0.0138 in.)
If the tip clearance is greater than the maximum, replace the oil pump assembly.





(d) Check the body clearance.
(1) Using a feeler gauge, measure the clearance between the driven rotor and pump body.
Standard clearance:
0.100 to 0.170 mm (0.0039 to 0.0067 in.)
Maximum clearance:
0.325 mm (0.0128 in.)
If the body clearance is greater than the maximum, replace the oil pump assembly.
4. INSPECT NO. 2 CHAIN SUB-ASSEMBLY Engine Unit
5. INSPECT OIL PUMP DRIVE SPROCKET Engine Unit
6. INSPECT OIL PUMP DRIVEN SPROCKET Engine Unit
7. INSPECT CHAIN TENSIONER PLATE Engine Unit