Cylinder Head Removal
- Remove air cleaner, spark plug wire tube and valve cover. Disconnect battery ground cable and drain cooling system. Disconnect fuel line at fuel pump and accelerator linkage.
- Disconnect electrical connections at automatic chokes. Disconnect vacuum line for brake servo. Remove dip stick support bracket. Rotate engine until number one piston is at TDC of compression stroke.
- Remove upper front engine cover. See UPPER FRONT ENGINE COVER REMOVAL . Bend back lock tabs and remove camshaft sprocket bolts and sprocket. Remove timing chain tensioner plug, spring and piston. Disconnect water hoses at base of intake manifolds.
- Disconnect exhaust pipes. Remove cylinder head bolts and install aligning pins to keep rocker arm shafts from moving. Remove cylinder head.
- To install, reverse removal procedure. Thoroughly clean mating surfaces and install a new gasket with sealer. Tighten bolts to specifications in sequence shown in illustration.
- Install camshaft sprocket and timing chain in correct position. See TIMING CHAIN REPLACEMENT . Install valve cover and tighten nuts to specification in sequence shown in illustration.
- After installation is complete and engine has run for a short time, shut off and allow to cool to approximately 100°F. Retighten cylinder head bolts to specifications in same sequence.
VALVES
| Engine & Valve | Head Diam. In. (mm) | Face Angle | Seat Angle | Seat Width In. (mm) | Stem Diameter In. (mm) | Stem Clearance In. (mm) | Valve Lift In. (mm) | |
|---|---|---|---|---|---|---|---|---|
| 1969-73 | ||||||||
| Intake | 1.811 (46) | 45° | 46° | .063-.079 (1.6-2.0) | .3133-.3140 (7.960-7.975) | .0010-.0022 (.025-.055) | ..... | |
| Exhaust | 1.496 (38) | 45° | 46° | .079-.094 (2.0-2.4) | .3128.3133 (7.945-7.960) | .0016-.0028 (.040-.070) | ..... | |