REMOVAL & INSTALLATION
CHEVROLET PRODUCED ENGINES
To access the rocker arms, first remove the valve covers. With the covers removed, loosen and remove the adjusting nuts and the rocker arm pivots. The rocker arms are then free to be removed from the cylinder head studs. Be sure to properly adjust the valve lash after replacing the rocker arms. Coat the replacement rocker arm and ball with SAE 90 gear oil before installation. Make sure the valves are closed on the cylinder you are working on during adjustment.
When replacing an exhaust rocker, move an old intake rocker to the exhaust rocker arm fastener and install the new rocker arm on the intake stud. This will prevent burning of the new rocker arm on the exhaust position.
Rocker arms studs that have damaged threads or are loose in the cylinder heads may be replaced by reaming the bore and installing oversize studs. Oversizes available are 0.003 in. and 0.013 in. The bore may also be tapped and screw-in studs installed. Several aftermarket companies produce complete rocker arm stud kits with installation tools. Some latemodel high performance small block engines use screw-in studs and pushrod guide plates.BUICK PRODUCED V6 ENGINE
- Disconnect the negative battery cable.
- Remove the rocker arm covers.
- Remove the rocker arm shaft assembly bolts.