Corolla Wagon L4-107.5 1762cc 1.8L DOHC (7A-FE) (1993)
Oil Pump: Testing and Inspection
COMPONENTS FOR DISASSEMBLY AND ASSEMBLY
OIL PUMP DISASSEMBLY
1. REMOVE RELIEF VALVE
(a) Using snap ring pliers, remove the snap ring.
(b) Remove the retainer, spring and relief valve.
2. REMOVE DRIVE AND DRIVEN ROTORS
Remove the 5 screws, pump body cover, O-ring. the drive and driven rotors.
OIL PUMP INSPECTION
1. INSPECT RELIEF VALVE
Coat the valve with engine oil and check that it falls smoothly into the valve hole by its own weight. If it doesn't, replace the relief valve.
If necessary, replace the oil pump assembly.