Surface Distortion

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

Using straightedge and feeler gauge, inspect the surface distortion of both the intake manifold and the intake manifold collector.
1. Standard : 0.1 mm (0.004 in)
Fig 1: Checking For Warpage
Courtesy of NISSAN MOTOR CO., U.S.A.