Caprice Wagon V8-350 5.7L (1994)
Rocker Arm Assembly: Adjustments
Fig. 5 Valve Lash Adjustment
Adjust valves, Fig.5, with engine at normal operating temperature. Rotate engine until No. 1 cylinder is in position to fire. Adjust exhaust valves
1-3-4-8 and intake valves 1-2-5-7. Crank engine one complete revolution, then adjust exhaust valves 2-5-6-7 and intake vales 3-4-6-8.
On all engines, the following procedure, performed with the engine running, should only be performed if readjustment is required.
1. After engine has been warmed up to normal operating temperature, remove valve cover and install a new valve cover gasket.
2. With engine running at idle speed, back off valve rocker arm nut until rocker arm starts to clatter.
3. Turn rocker arm nut down slowly until clatter just stops. This is the zero lash position.
4. Turn nut down 1/4 additional turn and pause 10 seconds until engine runs smoothly. Repeat additional 1/4 turns, pausing 10 seconds each time,
until nut has been turned down the number of turns listed in "Valve Clearance Specifications chart from the zero lash position. This preload
adjustment must be done slowly to allow lifter to adjust itself to prevent the possibility of interference between valve head and top of
piston, which might result in internal damage and/or bent push rods. Noisy lifters should be replaced.
