(3) Lift the intake manifold (18) up into position on the four inner studs (24) and install the manifold clamp
washers (17) and remaining four hex nuts (10). Tighten all six hex nuts with a torque wrench to 60 foot-
pounds of torque.
(4) Apply a coat of gasket cement to the gasket surface of the exhaust manifold and crankcase. Install the
connections (5 and 22) and two gaskets (6) with four hex head bolts (3) and lockwashers (4).
(5) Install the nipples (14 and 23), hoses (16), and clamps (15). Connect the radiator coolant hose to the
coolant outlet opening at the top of the exhaust manifold.
(6) Connect the ventilation regulator tube (20) to the tube elbow (19) in the intake manifold.
(7) Screw the bulb on the water temperature gage (23, fig. 39) and the pipe plug (26, fig. 55) into the exhaust
manifold (8) (8) Install the engine air cleaners and carburetor (par. 78b).
(9) Screw the nipple (2), with weather cap (1), into the top of the exhaust manifold.
(10) Fill the radiator (par. 6d (4)).
121. Valve Clearance Adjustment
a. Run the engine at a fast idle for about 15 minutes to normalize heat expansion of all parts. Then turn off the
ignition switch to prevent accidental starting during the adjustment procedure.
b. Remove the cylinder head cover (par. 119a), being careful not to damage the cover gasket.
c. Remove the spark plug from the number one cylinder (nearest the radiator) and place the thumb over the spark
plug opening. Have the engine cranked slowly by hand until an outward pressure is felt against the thumb. Continue
cranking slowly until the "DC" (dead center) mark on the flywheel is alined with the timing pointer on the rear engine
support. The number one piston now is at top dead center.
d. Loosen the lock nut (fig. 56) and turn the adjusting screw in or out until a 0.014-inch feeler gage fits snugly
between the rocker arm valve contact face and the end of the valve stem. Without further movement of the screw, tighten
the lock nut securely. Adjust the clearance of the second valve of the number one cylinder in the same manner.
e. Cranking the engine one-half revolution at a time, check and adjust each set of valves in succession. Remember
that the firing order of the engine is 1 2 4 :3. In other words, check and adjust the valve sets for cylinder one,
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