Tools Required

J 45059 Torque Angle Meter

1. Remove the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Left Side and/or Valve Rocker Arm Cover Replacement - Right Side .



2. Remove the valve rocker arm bolts.

Important: Place the parts on a clean surface. Store the components in order so they can be reassembled in the same location and with the same mating surfaces as when removed.

3. Remove the valve rocker arms.



4. Remove the valve rocker arm guide plate if all of the rocker arms are removed.



5. Remove the push rods.
6. Clean the push rods, the valve rocker arms, the bolts, and the guide plates in a suitable solution.
7. Clean the valve rocker arm bolts of all thread adhesive.

1. Use compressed air in order to blow oil out of the tapped holes in the cylinder head.



2. Lubricate the ends of the push rods with new engine oil. Install the push rods to the same position the push rods was removed from.



3. Install the valve rocker arm guide plates.



4. Install the valve rocker arms.

Notice: This bolt is designed to permanently stretch when tightened, and therefore MUST be replaced anytime it is removed. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged.

5. Apply GM P/N 12345493, (Canadian P/N 10953488) threadlocker or equivalent to the rocker arm bolt threads

Notice: Refer to Fastener Notice in the Preface section.

6. Install the rocker arm bolts.

Tighten

1. Tighten the bolts to 15 N·m (11 lb ft).
2. Use theJ 45059 to rotate the bolts an additional 90 degrees.
7. Install the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement - Left Side and/or Valve Rocker Arm Cover Replacement - Right Side .
8. Inspect the valve train for noise.