Inspection After Disassembly

Oil Pump Clearance

Measure the clearance with feeler gauge (C).
- Clearance between oil pump outer rotor and oil pump body [position (B)]
  Standard : Refer to "OIL PUMP ".
- Tip clearance between oil pump inner rotor and oil pump outer rotor [position (A)]
  
  Fig 1: Measuring Clearance Between Oil Pump Outer Rotor And Oil Pump Body Using Feeler Gauge
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Standard : Refer to "OIL PUMP ".
Measure the clearance with feeler gauge and straightedge (A).
- Side clearance between oil pump inner rotor and oil pump body [position (C)]
  Standard : Refer to "OIL PUMP ".
- Side clearance between oil pump outer rotor and oil pump body [position (B)]
  Standard : Refer to "OIL PUMP ".
  
  Fig 2: Measuring Side Clearance Between Oil Pump Outer Rotor And Oil Pump Body Using Straightedge
  Courtesy of NISSAN MOTOR CO., U.S.A.
Calculate the clearance between oil pump inner rotor and oil pump body as follows:

OIL PUMP BODY INNER DIAMETER

Measure the inner diameter of oil pump body with inside micrometer. [position (A)]

OIL PUMP INNER ROTOR OUTER DIAMETER

Measure the outer diameter of protruded portion of oil pump inner rotor (1) with micrometer. [position (B)]

Fig 3: Measuring Inner Diameter Of Oil Pump Body Using Inside Micrometer
Courtesy of NISSAN MOTOR CO., U.S.A.

OIL PUMP INNER ROTOR TO OIL PUMP BODY CLEARANCE

(Clearance) = (Oil pump body inner diameter) - (Oil pump inner rotor outer diameter)
Standard : Refer to "OIL PUMP ".

If measured/calculated values are out of the standard, replace oil pump assembly.
Regulator Valve Clearance

(Clearance) = (Regulator valve hole diameter) - (Regulator valve outer diameter)

Fig 4: Measuring Regulator Valve Clearance
Courtesy of NISSAN MOTOR CO., U.S.A.

Standard : Refer to "REGULATOR VALVE ".
If the calculated value is out of the standard, replace oil pump assembly.
CAUTION:
- Coat regulator valve with engine oil.
- Check that it falls smoothly into valve hole by its own weight.