Inspection After Disassembly: Notes

Clearance of Oil Pump Parts 

• Measure clearance with feeler gauge.

  Clearance between outer rotor and oil pump body (position 1)

  Standard : 0.114 - 0.200 mm (0.0045 - 0.0079 in) 

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

  Standard : Below 0.180 mm (0.0071 in) 

  Fig 1: Measuring Clearance 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 : 0.050 - 0.110 mm (0.0020 - 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 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 : 0.045 - 0.091 mm (0.0018 - 0.0036 in) 

     Fig 3: Calculate Clearance Between Inner Rotor And Oil Pump Body

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