Oil Pump Repair Procedures

Removal and Installation

1. 1
   Remove the timing chain cover. (Refer to Valve Timing - Timing Chain Cover)
2. 2
   Remove the oil pump cover (A). Tightening torque: Screws: 5.9 ~ 8.8 N·m Bolts: 8.8 ~ 13.7 N·m

   

3. 3
   Remove the inner rotor (A) and outer rotor (B).

   

4. 4
   Install in the reverse order of removal.

Inspection

1. 1
   Remove the relief plunger. Remove the plug (A), spring (B) and relief plunger (C). Tightening torque: Plug (A): 39.2 ~ 49 N·m

   

2. 2
   Inspect the relief plunger. Coat the plunger with engine oil and make sure it slides smoothly into the plunger bore under its own weight. If necessary, replace the timing chain cover.
3. 3
   Inspect the relief valve spring. Check the spring for deformation or breakage.
4. 4
   Check the rotor side clearance. Using a feeler gauge and a precision straightedge, measure the clearance between the inner rotor and the straightedge. If the side clearance is greater than the maximum, replace the rotors as a set. If necessary, replace the timing chain cover.

   Side clearance: 0.040 ~ 0.090 mm (0.00157 ~ 0.00354 in)

   

5. 5
   Check the body clearance. Using a feeler gauge, measure the clearance between the outer rotor and the body. If the body clearance is greater than the maximum, replace the rotors as a set. If necessary, replace the timing chain cover.

   Body clearance: 0.200 ~ 0.292 mm (0.00787 ~ 0.01150 in)

   

6. 6
   Check the rotor tip clearance.

   1. Measure the outer diameter of the inner rotor tip guide.

      Inner rotor diameter: 41.550 ~ 41.570 mm (1.63582 ~ 1.63661 in)

   2. Measure the inner diameter of the timing chain cover bore. Timing chain cover bore diameter: 41.600 ~ 41.625 mm (1.63779 ~ 1.63878 in)
   3. Check the clearance between the inner diameter of the timing chain cover bore and the outer diameter of the inner rotor tip guide.

      

   Guide clearance: 0.030 ~ 0.075 mm (0.00118 ~ 0.00295 in)