Exhaust Camshaft Replacement

Removal Procedure

1. Camshaft Exhaust Sprocket - Remove - Camshaft Exhaust Sprocket Replacement 
2. Fig 1: Identifying Exhaust Camshaft Bearing Cap Bolts With Loosening Sequence

   Courtesy of GENERAL MOTORS COMPANY
   NOTE:

   Many internal engine components will develop specific wear patterns on their friction surfaces.

   • The components MUST be separated, marked, or organized in a way to ensure the installation to their original location and position. Take precautions in order to prevent interchanging of parts.
   • Tag or mark each part immediately when removed. Indicate the location, direction, or orientation when necessary.

   Loosen the 8 camshaft bearing cap bolts (1) in sequence as shown in steps of 1/2 turn.

3. Courtesy of GENERAL MOTORS COMPANY

   Camshaft Bearing Cap Bolt (2) - Remove [8x]

4. Camshaft Bearing Front Cap (3) - Remove
5. Camshaft Bearing Cap (1) - Remove [3x]
6. Exhaust Camshaft (4) - Remove

Installation Procedure

1. Courtesy of GENERAL MOTORS COMPANY

   Coat the intake camshaft (4) and the camshaft bearing caps (1, 3) with engine oil. Adhesives, Fluids, Lubricants, and Sealers 

2. Exhaust Camshaft (4) - Install
NOTE:

Ensure that the caps are installed in their original location and position.

3. Camshaft Bearing Cap (3) - Install [3x]
4. Camshaft Bearing Front Cap (1) - Install
5. Camshaft Bearing Cap Bolt (2) - Loosely install [8x]
6. Fig 2: Identifying Exhaust Camshaft Bearing Cap Bolts With Tightening Sequence

   Courtesy of GENERAL MOTORS COMPANY

   Camshaft Bearing Cap Bolt (1) - Tighten in sequence [8x]

   1. First Pass: 8 N.m (71 lb in)
   2. Second Pass: Loosen 180 degrees
   3. Third Pass: 12 N.m (106 lb in)
   4. Final Pass: 12 N.m (106 lb in)
7. Camshaft Exhaust Sprocket - Install - Camshaft Exhaust Sprocket Replacement