Use Undersize Bearing Usage Guide

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

Use undersize (US) bearing when the oil clearance with standard size main bearing is not within specification.

When using undersize (US) bearing, measure the inside diameter of the bearing installed and grind the journal until the oil clearance falls within specification.

Bearing undersize table

BEARING UNDERSIZE TABLE

Undersize	Thickness
0.25 (0.0098)	2.618 - 2.626 (0.1031 - 0.1034)

CAUTION: Do not damage fillet R when grinding crankshaft journal in order to use undersized bearing (All journals).

Fillet R: 1.5 - 1.7 mm (0.059 - 0.067 in)

Fig 1: Identifying Fillet R

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