Overhaul

Oil Pump Removal

1. Remove the oil pump bolts.
2. Remove the oil pump.

Oil Pump Disassemble

2. Remove the primary camshaft drive chain lower guide bolts.
3. Remove the primary camshaft drive chain lower guide.

4. Remove the bolts holding the oil pump cover to the oil pump housing.

5. Remove the oil pump cover from the oil pump housing.

6. Remove the inner oil pump drive gear.
7. Remove the outer oil pump driven gear.

8. Remove the clip, holding the cap, for the oil relief valve components.
9. Remove the cap, spring, and plunger from the oil pump housing.

Oil Pump Cleaning and Inspection

Cleaning Procedure
1. Clean the oil pump components with non-corrosive solvent.

WARNING: Refer to [Safety Glasses Caution].

2. Dry the oil pump components with compressed air.

Inspection Procedure

NOTE: There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must not be reused. A disassembled oil pump must be replaced.

1. Inspect the oil pump housing for the following:
^ Damage, scoring, or debris on the housing surface for the driven gear (1)
^ Damage to the oil pump mounting bosses (2)
^ Damage, scoring, or debris on the housing surface for the drive gear (3)
^ Damage, scoring, or debris in the oil pump relief valve port (4)
^ Damage, scoring, or debris in the oil pump intake port (5)
^ Damage, scoring, or debris in the oil pump relief valve bore (6)
^ Damage, scoring, or debris in the oil pump output port (7)
^ Damage to the threads in the oil pump housing for the oil pump cover bolts (8)

2. Inspect the oil pump cover for the following conditions:
^ Damage to the oil pump cover mounting bosses (1)
^ Damage, scoring, or debris in the oil pump cover oil passages (2)
^ Damage to the sealing surface between the oil pump cover and the oil pump housing (3)

3. Inspect the inner drive gear for damage. If inner diameter damage is found, ensure the crankshaft is also inspected.

4. Inspect the outer driven gear for damage.

5. Inspect the oil pump relief valve components for debris or damage.

6. Inspect the primary camshaft drive chain lower guide for damage (1-3).
7. If debris or damage is present within the oil pump, further inspection of all of the engine components is necessary.

Oil Pump Assemble

1. Install the oil pressure relief valve components.
a. Install the oil pressure relief valve.
b. Install the oil pressure relief valve spring.
c. Install the oil pressure relief valve bore plug.
d. Install the oil pressure relief valve bore plug retainer C-clip.

NOTE: There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must be replaced. DO NOT reuse a disassembled oil pump or a serviceable oil pump with a primary camshaft drive chain lower guide that needs to be replaced.

2. The dimpled surface must be face-up in the pump body.

3. Install the inner and the outer rotors in the oil pump cover in the same orientation as removed.
4. The outer rotor has a dimple to indicate the outer surface.

5. Assemble the oil pump housing and cover.

CAUTION: Refer to [Fastener Notice].

6. Install the oil pump bolts.
Tightening torque
Tighten the oil pump bolts to 10 Nm (89 in. lbs.).

Oil Pump Installation

1. Align the oil pump generator with the crankshaft flats and install the oil pump to the engine block.
2. Align the pump body with the mounting holes in the cylinder block.

CAUTION: Refer to [Fastener Notice].

3. Install the oil pump bolts.
Tightening torque
Tighten the oil pump bolts to 23 Nm (17 ft. lbs.).