Oil Pump: Inspection

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

Install the oil pump rotors with the punch marks on the oil pump cover side.

Fig 1: Installing Oil Pump Rotors With Punch Marks On Oil Pump Cover Side
Courtesy of NISSAN MOTOR CO., U.S.A.

Using a feeler gauge, check the following clearances.

Fig 2: Checking Clearances Using Feeler Gauge

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

Standard clearance:

Unit: mm (in)

STANDARD CLEARANCE REFERENCE

Body to outer rotor radial clearance 1	0.114-0.200 (0.0045-0.0079)
Inner rotor to outer rotor tip clearance 2	Below 0.18 (0.0071)
Body to inner rotor clearance 3	0.030-0.070 (0.0012-0.0028)
Body to outer rotor axial clearance 4	0.030-0.090 (0.0012-0.0035)
Inner rotor to brazed portion of housing clearance 5	0.045-0.091 (0.0018-0.0036)

Fig 3: Checking Clearances Using Feeler Gauge

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

If the tip clearance (2) exceeds the limit, replace the rotor set.
If the body to rotor clearances (1, 3, 4, 5) exceed the limit, replace the front cover assembly.

Fig 4: Checking Rotor Clearance Using Inside Micrometer

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