Cleaning and Inspection

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

Clean the camshaft with cleaning solvent.

Fig 1: Inspecting Camshaft

Courtesy of GENERAL MOTORS CORP.

WARNING: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

Inspect the camshaft for the following conditions:
- Scored camshaft bearing journals (1)
- Damaged camshaft lobes (2)
- Damaged camshaft sprocket locator pins (3)
- Damaged threads (4)
- Damage to the camshaft reluctor tooth (5)

Fig 2: Measure Camshaft Journals With Micrometer

Courtesy of GENERAL MOTORS CORP.

Measure the camshaft journals using a micrometer.
If the camshaft journals are not within specifications, replace the camshaft.

Fig 3: Measuring Camshaft With J 7872

Courtesy of GENERAL MOTORS CORP.

Measure the camshaft runout using the J 7872: indicator.
1. Mount the camshaft in V-blocks between the centers.
2. Use the J 7872: indicator in order to measure the intermediate camshaft journal.
Measure the camshaft lobe lift using the J 7872: indicator.
1. Lubricate the camshaft using GM P/N United States 12345501, GM P/N Canada 992704 or the equivalent.
2. Set the camshaft on V-blocks.
3. Use the J 7872: indicator in order to measure the lobe lift.
If the runout or lobe lift is not within specifications, replace the camshaft.