Tools Required

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.

J 42038 Camshaft Holding Fixture

Remove the camshaft cover bolts.
Lift the camshaft cover off the cylinder head evenly.

Fig 1: Removing Camshaft Cover
Courtesy of GENERAL MOTORS CORP.

CAUTION: The camshaft holding tools must be installed on the camshafts to prevent camshaft rotation. When performing service to the valve train and/or timing components, valve spring pressure can cause the camshafts to rotate unexpectedly and can cause personal injury.
Install the J 42038 onto the ends of the camshaft. Rotate the engine to align the camshafts with the tool using the hex in the camshaft and an open end wrench.

Fig 2: Installing J 42038
Courtesy of GENERAL MOTORS CORP.
When installed properly, the J 42038 will be fully seated on the camshaft ends with the camshaft flats parallel to the cam cover sealing surface.

Fig 3: Identifying J 42038
Courtesy of GENERAL MOTORS CORP.