Measuring Camshaft End Play

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exploded View Of Intake Valve Rocker Arms

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: In order to properly measure camshaft end play, the rocker arm shafts must be bolted to the cylinder heads.

Remove the rocker arms (215 and 218) and springs (219) from the shafts (220 and 221).
Lubricate the bolt (214) threads and flanges with clean engine oil.
Install the rocker arm shafts (220, 221) and bolts (214) to the cylinder heads.

Fig 2: View Of Cylinder Head Rocker Shaft Bolts

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Tighten the left cylinder head rocker shaft bolts in sequence.
Tighten:
1. Tighten the bolts a first pass to 12 N.m (106 lb in).
2. Tighten the bolts a final pass to 24 N.m (17 lb ft).

Fig 3: Right Cylinder Head Rocker Shaft Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

Tighten the right cylinder head rocker shaft bolts in sequence.
Tighten:
1. Tighten the bolts a first pass to 12 N.m (106 lb in).
2. Tighten the bolts a final pass to 24 N.m (17 lb ft).

Fig 4: Identifying Rear Camshaft Cap, Bolts, O-Ring, Cam & Seal

Courtesy of GENERAL MOTORS CORP.

Install the camshafts (209), caps (211), and bolts (212).
Tighten: Tighten the bolts to 22 N.m (16 lb ft).

Fig 5: Checking Camshaft End Play

Courtesy of GENERAL MOTORS CORP.

Seat the camshaft by pushing it toward the rear of the cylinder head.
Use the SA9179NE in order to measure the end play. See Special Tools . Zero the dial indicator against the end of the camshaft. Push the camshaft forward and rearward and measure the end play.
Specification:
- Camshaft end play - new: 0.05-0.2 mm (0.002-0.008 in)
- Camshaft end play - service limit: 0.2 mm (0.008 in)