Camshaft Installation

IMPORTANT: If camshaft replacement is required, the valve lifters must also be replaced.

Lubricate the camshaft journals and the bearings with clean engine oil.
Install 3 M8 - 1.25 x 100 mm (M8 - 1.25 x 4.0 in) bolts into the camshaft front bolt holes.

NOTE: All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.

Fig 1: View Of Bolts installed In Camshaft Front Bolt Holes

Courtesy of GENERAL MOTORS CORP.

Using the bolts as a handle, carefully install the camshaft into the engine block.
Remove the 3 bolts from the front of the camshaft.

NOTE: Refer to Fastener Notice .

IMPORTANT:

Install the retainer plate with the sealing gasket facing the engine block.

Fig 2: View Of Camshaft Retainer Plate
Courtesy of GENERAL MOTORS CORP.
The gasket surface on the engine block should be clean and free of dirt or debris.

Install the camshaft retainer and the bolts.
Tighten the camshaft retainer bolts.

Fig 3: Identifying Camshaft Retainer Bolts
Courtesy of GENERAL MOTORS CORP.

Tighten:
- Tighten the hex head bolts (3) to 25 N.m (18 lb ft).
- Tighten the TORX® head bolts (4) to 15 N.m (11 lb ft).
Inspect the camshaft position (CMP) sensor O-ring seal. If the O-ring seal is not cut or damaged, it may be used again.
Lubricate the O-ring seal with clean engine oil.
Install the CMP sensor and bolt.

Fig 4: View Of Camshaft Position (CMP) Sensor & Bolt
Courtesy of GENERAL MOTORS CORP.

Tighten: Tighten the CMP sensor bolt to 25 N.m (18 lb ft).