Inspection After Disassembly

Measure the clearance of the oil pump parts. 

• Measure clearance with feeler gauge.
• Clearance between outer rotor and oil pump body (position 1).

  Standard : 0.114 - 0.179 mm (0.0045 - 0.0070 in) 

• Tip clearance between inner rotor and outer rotor (position 2).

  Standard : Below 0.220 mm (0.0087 in) 

  Fig 1: Measuring Clearance Between Inner Rotor And Oil Pump Body With Feeler Gauge

  Courtesy of NISSAN MOTOR CO., U.S.A.
• Measure clearance with feeler gauge and straightedge.
• Side clearance between inner rotor and oil pump body (position 3).

  Standard : 0.030 - 0.070 mm (0.0012 - 0.0028 in) 

• Side clearance between outer rotor and oil pump body (position 4).

  Standard : 0.060 - 0.110 mm (0.0024 - 0.0043 in) 

  Fig 2: Measuring Clearance With Feeler Gauge And Straightedge

  Courtesy of NISSAN MOTOR CO., U.S.A.
• Calculate the clearance between inner rotor and oil pump body as follows:

1. Measure the outer diameter of protruded portion of inner rotor (Position 5).
   Fig 3: Measuring Outer Diameter

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Measure the inner diameter of oil pump body with inside micrometer (Position 6).

   (Clearance) = (Inner diameter of oil pump body) - (Outer diameter of inner rotor).

   Standard : 0.035 - 0.070 mm (0.0014 - 0.0028 in) 

   Fig 4: Measuring Inner Diameter Of Oil Pump Body

   Courtesy of NISSAN MOTOR CO., U.S.A.
   • Regulator valve clearance:

     (Clearance) = D1(Valve hole diameter) - D2 (Outer diameter of valve)

     Standard : 0.040 - 0.097 mm (0.0016 - 0.0038 in) 

     CAUTION: Coat regulator valve with engine oil.
     Check that it falls smoothly into the valve hole by its own weight.
     Fig 5: Identifying Regulator Valve Clearance

     Courtesy of NISSAN MOTOR CO., U.S.A.