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Engine Oil Pump Overhaul


Exploded View
Special Tools Required

Sub hanger stay
 07MAK-PY30100
Removal
  1. Remove the alternator mounting bolt, then install the sub hanger stay.
  1. Attach the chain to the sub hanger stay. Lift and support the engine with the chain.

  1. Remove the oil screen (A), then remove the oil pump (B).
L15A7 engine
L13Z1 engine
L12B1 engine

Inspection
  1. Remove the screws from the oil pump housing, then separate the pump housing and pump cover.
  1. Check the inner-to-outer rotor radial clearance between the inner rotor (A) and the outer rotor (B). If the inner-to-outer rotor clearance exceeds the service limit, replace the oil pump assembly.

    Inner Rotor-to-Outer Rotor Radial Clearance

    Standard (New):
    0.06−0.16 mm (0.002−0.006 in.)
    Service Limit:
    0.20 mm (0.008 in.)


  1. Check the pump housing-to-rotor axial clearance between the rotors (A) and pump housing (B). If the pump housing-to-rotor axial clearance exceeds the service limit, replace the oil pump assembly.

    Housing-to-Rotor Axial Clearance

    Standard (New):
    0.02−0.06 mm (0.001−0.002 in.)
    Service Limit:
    0.15 mm (0.006 in.)


  1. Check the pump housing-to-outer rotor radial clearance between the outer rotor (A) and the pump housing (B). If the pump housing-to-outer rotor radial clearance exceeds the service limit, replace the oil pump assembly.

    Pump Housing-to-Outer Rotor Radial Clearance

    Standard (New):
    0.100−0.175 mm (0.0039−0.0069 in.)
    Service Limit:
    0.20 mm (0.008 in.)

  1. Inspect both rotors and the pump housing for scoring or other damage. Replace the parts, if necessary.
  1. Check that the oil pump turns freely.

Installation
  1. Clean the O-ring groove and the mating surface of the engine block.
  1. Install the oil pump (A) with a new O-ring (B).
  1. Install the oil screen (C) with a new gasket (D).
  1. Support the engine with a jack and wood block under the oil pan.
L15A7 engine
L13Z1 engine
L12B1 engine

  1. Remove the chain and sub hanger stay, then tighten the alternator mounting bolt.