Disassembly and Assembly

OIL PUMP

Disassembly and Assembly












CAUTION:
Before assembly, apply new engine oil to the parts as shown.

DISASSEMBLY

1.Remove the oil pump cover.
2.Remove inner rotor and outer rotor from oil pump housing.

CAUTION:
The outer rotor has directional vanes in relation to the rotation of the oil pump shaft. Note the outer rotor vane direction for assembly.
3.Remove oil strainer from oil pump housing.
4.After removing regulator plug, remove spring and regulator valve.

INSPECTION AFTER DISASSEMBLY

Clearance of Oil Pump Parts
Revision: March 20122013 Infiniti JX





- Measure clearance with feeler gauge.
- Clearance between outer rotor and oil pump body (position 1).
Standard: "Oil Pump" Oil Pump
- Tip clearance between inner rotor and outer rotor (position 2).
Standard: "Oil Pump" Oil Pump





- Measure clearance with feeler gauge and straightedge.
- Side clearance between inner rotor and oil pump body (position 3).
Standard: "Oil Pump" Oil Pump
- Side clearance between outer rotor and oil pump body (position 4).
Standard: "Oil Pump" Oil Pump
- Calculate the clearance between inner rotor and oil pump body as follows:





1.Measure the outer diameter of protruded portion of inner rotor (position A).
2.Measure the inner diameter of oil pump body with inside micrometer (position B).
(clearance 5) = (inner diameter of oil pump body B) - (outer diameter of inner rotor A)
Standard: "Oil Pump" Oil Pump
3.If out of specifications, replace oil pump assembly.
Regulator Valve





1.Visually inspect components for wear and damage.
2.Check oil pressure regulator valve sliding surface and valve spring.
3.Coat regulator valve with engine oil. Check that it falls smoothly into the valve hole by its own weight.
If damaged, replace oil pump assembly.
Regulator Valve Clearance
Revision: March 20122013 Infiniti JX





(Clearance 6) = D (Valve hole diameter) - E (Outer diameter of valve)
Standard: "Regulator Valve" Regulator Valve
If it exceeds the standard, replace the oil pump assembly.

CAUTION:
- Coat regulator valve with engine oil.
- Check that it falls smoothly into the valve hole by its own weight.

Assembly






Assembly is in the reverse order of disassembly.
- Assemble the outer rotor in the correct vane orientation to rotation as noted during disassembly and the inner rotor with the groove on the oil pump cover side.

CAUTION:
- Do not reuse O-ring.
- Before assembly apply new engine oil to the parts as specified.
Revision: March 20122013 Infiniti JX