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 TM 55-1905-217-34
(c) Install the nozzles flush to 1/32 inch below (recessed) the bottom surface of the cylinder head; otherwise,
interference with proper seating of the head on the cylinder block may be encountered.
(d) Check to make sure the nozzles fit tight in the cylinder head. If the water holes have been enlarged by
corrosion, expand the nozzles by means of a wood plug or other suitable tool, or tin the outside diameter with solder to
provide a tight fit. If solder is used, exercise care so that the orifices in the nozzles are not closed with solder.
(8) Replace a cylinder head that is damaged beyond repair.
e. Reassembly.
(1) The service replacement cylinder head assemblies incorporate fuel inlet and outlet manifolds which are cast
internally with the head. The head assemblies include the water and exhaust manifold studs, water inserts, all of the
necessary plugs, and assembly instructions. Fuel pipe connectors and washers, a length of flexible fuel hose and fittings,
and a restricted fitting are also included.
(2) Injector clamp bolts to studs are not included and it is necessary to use new parts or transfer the old parts to the
new cylinder head.
(3) After cleaning and inspection, install the required plugs in the cylinder head. Apply a small amount of "dual
purpose" sealer to the threads of the pipe plugs only. Work the sealer into the threads and wipe off the excess with a
clean, lint- free cloth so that the sealer will not be washed into the fuel or oil passages. Install and tighten the plugs. Drive
headless plugs flush to 1/16 inch below the surface of the cylinder head.
(4) After the following parts are cleaned and inspected, and replaced if necessary, reinstall them in the old cylinder
head or transfer them to the new head. Refer to chapter one, table 5, for torque requirements.
(a) Exhaust valves, springs, and spring seats.
(b) Push rods, springs, spring seats and retainers, cam followers and guides.
(c) Exhaust valve and injector rocker arms, shafts, and brackets.
(d) Fuel injectors.
(e) Fuel oil manifolds (if separate manifolds are used), fuel pipes, and fuel pipe connectors.
NOTE
If a new cylinder head is used, the new shorter fuel pipe connectors and sealing washers
must be used and the old fuel manifolds discarded.
f. Pre-Installation Inspection. The following inspections shall be made just prior to installing the cylinder head onto the
engine. Make these inspections regardless of whether the head was removed from the engine for servicing only the head
assembly or to facilitate other repairs to the engine.
(1) Check the cylinder head studs for damaged threads.
(2) Check for extruded areas around the stud holes in the cylinder block.
(3) Check the cylinder liner height with relationship to the cylinder block.
(4) Check to be sure the tops of the pistons are clean and free of foreign material.
(5) Check to see that ALIL of the push rods are threaded into their devises until the ends of the push rods project
through the clevises. This is important since serious engine damage will be prevented when the engine is cranked or
barred- over during tune-up.
(6) Check the cylinder block and cylinder head gasket surfaces and counterbores to ascertain that these sealing
surfaces are clean and free from foreign material. Also check to ensure that there are no burrs or sharp edges in the
counterbores.
(7) Check the four corner plugs or drive pins used to plug the vertical oil galleries to ensure that they are flush with,
or below, the top surface of the cylinder block.
g. Installation. Install the cylinder head in reverse order of removal (a) above.
3-14. Rocker Arms, Cam Followers, and Push Rods
a. Rocker Arms and Shaft.
(1) Removal.
(a) Remove the cylinder head (para. 3-13).
(b) Disconnect and remove fuel pipes from injector and fuel connectors (TM 55-1905-217-12).
(c) Remove the two bolts that hold the rocker arm shaft brackets to the head. Remove brackets and shaft as
shown in figures 3-50 and 3-51.
3-68
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