CYLINDER HEAD - TM-10-3930-607-150039

ENGINE

timing, remove distributor cap and

record rotor position.

Remove the distributor, the coil mount bracket, the

governor spring bracket, and the spark plugs. Loosen

and remove the nuts holding the cylinder head to the

block. Remove the head from the engine.

B. CLEANING AND INSPECTION

1. Remove all carbon from combustion areas, using

a scraper and wire brush. (Fig. 6)

Figure 4.

Figure 6.

Clean the cylinder head thoroughly with a solvent or

degreasing solution and blow it off with compressed air.

Make sure the gasket contact surface of the head is

clean, smooth and flat. Check flatness with straightedge

and feeler gauge in three positions lengthwise and five

crosswise. The maximum permissible is .004" low in the

center lengthwise, gradually decreasing toward the

Figure 5.

ends, or .003" crosswise or in localized low spots.

oil cooling hoses at the valve and cap. Remove the two

front engine mounts nuts. Attach a hoist and support

2. Inspect for cracks. Wipe planed surface with a

the engine weight. Place a block beneath the converter

rag saturated with kerosene, wipe head dry then tap

housing and remove the capscrews holding it to the

lightly throughout entire surface.

Cracks will be

engine converter housing adaptor plate. Lift the

indicated by the kerosene being vibrated out of the

engine from the truck.

crack and appearing on the planed surface.

CYLINDER HEAD

A. REMOVAL

NOTE:

To aid in obtaining correct ignition

B-2