Clearance of Oil Pump Parts

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Measure the rotor clearance with a feeler gauge as shown.
- Clearance between outer rotor and oil pump body (position 1).
  Position 1: 0.114 - 0.200 mm (0.0045 - 0.0079 in)
- Tip clearance between inner rotor and outer rotor (position 2).
  Position 2: less than 0.180 mm (0.0071 in)
Fig 1: Measuring Rotor Clearance With Feeler Gauge
Courtesy of NISSAN MOTOR CO., U.S.A.
Measure the rotor clearance with a feeler gauge and straightedge as shown.
- Side clearance is between the inner rotor and the oil pump body (position 3).
  Position 3: 0.030 - 0.070 mm (0.0012 - 0.0028 in)
- Side clearance is between the outer rotor and the oil pump body (position 4).
  Position 4: 0.050 - 0.110 mm (0.0020 - 0.0043 in)
Fig 2: Measuring Rotor Clearance With Feeler Gauge
Courtesy of NISSAN MOTOR CO., U.S.A.
Calculate the clearance between inner rotor and oil pump body as follows.
- Measure the outer diameter of protruded portion of inner rotor (position A).
- 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).

Clearance 5: 0.045 - 0.091 mm (0.0018 - 0.0036 in)

Fig 3: Measuring Outer Diameter Of Protruded Portion Of Inner Rotor And Inner Diameter Of Oil Pump Body

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