Flywheel Inspection

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.

Check contact surface of flywheel for slight burns or discoloration. Clean flywheel with emery paper.
Check flywheel runout.
1. Maximum allowable runout : Refer to FLYWHEEL RUNOUT .
  
  Fig 1: Checking Flywheel Runout
  Courtesy of NISSAN MOTOR CO., U.S.A.