From the book
Valves, Adjust
With mechanical lifters
If the cylinder head or rocker arm assemblies have been removed and installed, a preliminary (cold) valve lash adjustment should be made before starting the engine. If the adjustment is made in connection with an engine tune-up, the valve lash adjustment should be made with the engine at operating temperature.
To make the “hot†adjustment; operate the engine for a minimum of 30 minutes at a fast idle to stabilize engine temperatures. With the engine idling, check the valve lash with the proper feeler gauge between valve stem and rocker arm. Adjust the lash by means of the adjusting screw to the clearance given in the Valve Specifications table.
To make the “cold’ adjustment, first turn over the engine to bring Number 1 piston up on its compression stroke, which will be indicated by the TDC mark on the vibration damper. Then proceed as follows.
Silent Valve Lash Mechanism 1961-1964
As shown in figure 4, the rocker arm eccentric functions throughout the rocker arm motion during the valve opening and closing cycle, compensation for expansion or wear of the valve train. Therefore, solid contact, “silent lash†between all parts of the valve train mechanism is maintained.
After removal or replacement of rocker arm or associated parts, the eccentrics are to be adjusted to their operating position in two steps: First to an initial adjustment and, second, to the final position. The initial position is accomplished with the engine shut off; the final position is made with the engine running at normal idle speed. Adjustments for noise complaints and “out-of-position†eccentrics require only the final adjustment procedure.
In making the initial adjustment position each piston at approximately TDC of compression stroke and adjust the two associated rocker arms as follows:
- Remove rocker arm cover
- Adjust rocker arm by pushing eccentric toward rocker arm until plunger is completely into its rocker arm bore Figure 5. Turn adjusting screw until eccentric and plunger ar hed in the depressed position.
- Slowly turn adjusting screw out until adjustment mark on eccentric is centered over valve stem, Fig 6. and lock jam nut. Correct position of adjustment mark is shown in fig 7.
- Repeat forgoing adjustment on the remaining rocker arms, bringing the piston of each cylinder up on its compression stroke so that both valves are closed.
- After all rocker arms have been adjusted, start engine and operate at normal idle speed. Observe position of adjustment mark on each eccentric.
- Make minor adjustments as necessary with engine idling by turning adjusting screws as necessary.
- After adjustments have been completed, torque the jam nuts to 35ft/lbs, stop engine and install rocker cover.
I've got the pictures/figures to go with the article but I need to resize/separate/touchup them a little before posting.
-ron
