C 30 P/U 2WD V8-379 6.2L DSL (1985)
Fig. 16 Positioning engine for rocker arm shaft installation
1.
Remove valve cover.
2.
Remove rocker arm and shaft assembly.
3.
On 1982---84 engines, remove cotter pin, then remove rocker arms from shaft noting position for installation, Fig. 14.
4.
On 1985---87 engines, proceed as follows:
a. Insert screwdriver into bore of rocker shaft and break off ends of nylon rocker arm retainers.
b. Remove tops of retainers, Fig. 15, then remove rockers, noting position for installation.
5.
Remove pushrods, noting position for installation. Pushrods are identified with a paint stripe on the on the upper end, and the hardened upper ball
is darker in color than the lower ball. Failure to install pushrods in proper position may result in premature wear or damage.
6.
Reinstall pushrods, if removed.
7.
On 1982---84 engines, install rockers and springs on shaft in proper order, then secure assembly with new cotter pins.
8.
On 1985---87 engines, install rockers on shaft, centering each rocker over hole in shaft, then install new retainers using suitable drift.
9.
Before installing rocker arm shafts, align TDC mark on engine with mark on engine balancer, then rotate crankshaft 31/2 inches counterclockwise,
or to first lower water pump bolt, Fig. 16. This will position engine so that all valves are closed. Torque rocker arm shaft bolts to specifications,
tightening bolts slowly to allow lifters to bleed down. The rocker arm shaft must be installed with the split in the ring around the shaft at
bottom.
