Undersize Bearings 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.

When the specified oil clearance is not obtained with standard size connecting rod bearings, use undersize (US) bearings.

When using undersize bearing, measure the bearing inside diameter with the bearing installed, and grind the crankshaft pin so that the oil clearance satisfies the standard.

Bearing undersize table

BEARING UNDERSIZE TABLE

Undersize	Thickness
0.25 (0.0098)	1.627 - 1.635 (0.0641 - 0.0644)

CAUTION: In grinding the crankshaft pin to use undersize bearings, keep the fillet R (All crankshaft pins).

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.