Push Rod: Service and Repair

REMOVAL PROCEDURE





1. Remove the valve rocker arm cover(s).
2. Remove the valve rocker arm bolt(s).

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 arm(s).





4. Remove the push rod guide plate if all the rocker arms are removed.





5. Remove the push rod(s).
6. Clean the push rod(s), the rocker arm(s), the bolt(s) and the retainer(s) in a suitable solution.
7. Clean the rocker arm bolt(s) of all thread adhesive.


INSTALLATION PROCEDURE

^ Tools Required
- J 36660 Electronic Torque Angle Meter





1. Use compressed air in order to blow oil out of the tapped holes in the cylinder head.
2. Install the push rod(s) to the same position the push rod(s) was removed from.





3. Install the push rod guide plate(s).





4. Install the valve rocker arm(s).

Notice: This bolt is designed to permanently stretch when tightened. 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 threadlocker or equivalent to the rocker arm bolt threads.

Notice: Refer to Fastener Notice in Service Precautions.

6. Install the rocker arm bolt(s).
^ Tighten the rocker arm bolt(s) to 15 Nm (11 ft. lbs.). Use the J 36660 in order to rotate the bolts an additional 90°.
7. Install the valve rocker arm cover(s).
8. Inspect the valve train for noise.