Seal Ring Clearance

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Measure clearance between seal ring and ring groove.

Fig 1: Measuring Clearance Between Seal Ring And Ring Groove
Courtesy of NISSAN MOTOR CO., U.S.A.

Standard clearance: 0.1 - 0.25 mm
1. (0.0039 - 0.0098 in)
Allowable limit: 0.25 mm (0.0098 in)
If not within allowable limit, replace oil pump cover assembly.