Oil Pump: Service and Repair

OIL PUMP ASSEMBLY (2GR-FE)





COMPONENTS

OVERHAUL





1. REMOVE OIL PUMP RELIEF VALVE
a. Using a 27 mm socket wrench, remove the relief valve plug.
b. Remove the valve spring and oil pump relief valve.





2. REMOVE OIL PUMP COVER
a. Remove the 8 bolts, oil pump cover, drive rotor and driven rotor.





3. INSPECT OIL PUMP RELIEF VALVE
a. 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.





4. INSPECT OIL PUMP ROTOR SET
a. Install the rotors to the timing chain cover with the rotors' marks facing outward. Check that the rotors revolve smoothly.





b. Check the tip clearance.
1. Using a feeler gauge, measure the clearance between the drive and driven rotor tips, as shown in the illustration.





Tip clearance: If the tip clearance is greater than the maximum, replace the drive and driven rotors.





c. Check the side clearance.
1. Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge, as shown in the illustration.





Side clearance: If the side clearance is greater than the maximum, replace the timing chain cover.





d. Check the body clearance.
1. Using a feeler gauge, measure the clearance between the timing chain cover and driven rotor, as shown in the illustration.





Body clearance: If the body clearance is greater than the maximum, replace the timing chain cover.
5. INSTALL OIL PUMP COVER





a. Coat the drive and driven rotors with engine oil and place them into the timing chain cover with the marks facing outward (oil pump cover side). Check that the rotors revolve smoothly.





b. Install the oil pump cover with the 8 bolts.
Torque: 9.1 Nm (93 kgf-cm, 81 inch lbs.)

HINT:
Bolt length:
22 mm (0.87 inch) for bolt A
40 mm (1.58 inch) for bolt B





6. INSTALL OIL PUMP RELIEF VALVE
a. Coat the oil pump relief valve with engine oil.
b. Insert the relief valve and relief valve spring into the oil pump cover hole.
c. Using a 27 mm socket wrench, install the plug.
Torque: 49 Nm (500 kgf-cm, 36 ft. lbs.)