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Hydraulic Lifter Adjustment

"Bump" engine around until rotor is at number I cylinder position and points are just open. Adjust the following valves:

Intake  - Nos. 1, 2, 4. Exhaust  - Nos. 1, 3, 5.

Back out rocker arm adjusting nut until lash is felt at push rod, then turn in nut until all lash is removed. Turn adjusting nut in one full additional turn.

"Bump" engine abound until rotor is at No 6 cylinder position and points are just open Adjust the following valves:

Intake  - Nos 3, 5, 6 Exhaust  - 2, 4, 6

Fig 1: Hydraulic Valve Lifter Assemblies
G09324181Courtesy of GENERAL MOTORS COMPANY
VALVE SPRINGS

Engine Free Length PRESSURE (LBS.)
Valve Closed Valve Open
153"      
1965-70 2.08" 78-86@1.66" 170-180@1.26"
194"      
1965 2.03" 56-64@1.66" 170-184@1.33"
1966-67 1.92" 56-64@1.66" 170-184@ 1.33"
230"      
1965 2.03" 56-64@1.66" 170-184(5)1.33"
1966-70 1.92" 56-64@1.66" 170-184@1.33"
250"      
1966-73 1.90" 56-64@1.66" 180-192@1.27"