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.

Oil Pump Housing, Oil Pump Cover, Inner Gear and Outer Gear

Check for wear or damage.

Side Clearances

Measure side clearance of inner and outer gears in at least four places around each outside edge. Maximum measured values should be within specified positions.
1. Standard clearance: 0.030 - 0.050 mm (0.0012 - 0.0020 in)
If clearance is less than standard, select inner and outer gear as a set so that clearance is within specifications.
1. Inner and outer gear: Refer to OIL PUMP ".
If clearance is more than standard, replace whole oil pump assembly except oil pump cover.

Fig 1: Measuring Side Clearance Of Inner And Outer Gears
Courtesy of NISSAN MOTOR CO., U.S.A.
Measure clearance between outer gear and oil pump housing.
1. Standard clearance: 0.111 - 0.181 mm (0.0044 - 0.0071 in)
2. Allowable limit: 0.181 mm (0.0071 in)
If not within allowable limit, replace whole oil pump assembly except oil pump cover.

Fig 2: Measuring Clearance Between Outer Gear And Oil Pump Housing
Courtesy of NISSAN MOTOR CO., U.S.A.