Crankshaft End Play Measurement

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Before removing the crankshaft, measure the crankshaft end play using the following procedure:

Reinstall the lower crankcase.
Place a dial indicator at the crankshaft nose.
Gently force the crankshaft to the extreme front and rear positions with a pry tool while monitoring the movement of the dial indicator.
The crankshaft end play should not exceed 0.5 mm (0.020 in).
If the specifications are exceeded inspect the thrust bearing thrust OD and the crankshaft thrust wall for wear and/or excessive runout.
Replace the thrust bearing or crankshaft as necessary.

Fig 1: Installing Lower Crankcase
Courtesy of GENERAL MOTORS CORP.