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 : 0.170 - 0.220 mm (0.0067 - 0.0087 in) 

  Fig 1: Measuring Clearance Between Outer Rotor & Oil Pump Body

  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 & 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 Of Protruded Portion Of Inner Rotor

     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 With Inside Micrometer

     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: Checking Regulator Valve Clearance

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