Camshaft and Bearings Cleaning & Inspection: Procedure

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Measure Camshaft Journals With Micrometer

Courtesy of GENERAL MOTORS CORP.

Measure the camshaft journals with a micrometer.
If the camshaft journals are not within specifications, replace the camshaft. The measurement should be 47.655-46.858 mm (1.8462-1.8448 in). If the measurement is not within specifications the engine camshaft must be replaced.

Fig 2: Measuring Camshaft Runout

Courtesy of GENERAL MOTORS CORP.

Measure the camshaft runout using J 7872 .
1. Mount the camshaft in V-blocks between centers.
2. Use J 7872 to check the intermediate camshaft journal.
If the runout exceeds specifications, the camshaft is bent and should be replaced. If the camshaft journals are more than 0.025 mm (0.0010 in) out-of-round, then replace the engine camshaft.