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Section 4 Engine Service
Installing Valves (L-Head Engine)
If the engine being serviced is an L-head engine,
engine reassembly should continue with reinstal-
lation of the valves. If an overhead valve engine is
being reassembled, the valves are located in the cyl-
inder head rather than the block. Overhead valves
can be reinstalled toward the end of the reassembly
process. Overhead valve installation is covered in a
separate section later in this chapter.
After the valves and seats have been properly
reconditioned, apply valve guide lubricant to the
valve stems and then place each valve in its respec-
tive guide. Use a valve spring compressor to com-
press the spring and, then, install the keepers. See
Figure 19-2.
When reinstalling the valve springs, note that
the coils are closer together on one end of the spring
than on the other. These are called dampening
coils and they should be located opposite the valve
cap and retainers. See Figure 19-3.
Installing the Crankshaft,
Camshaft, and Governor Gear
Tape the crankshaft keyways. This will protect
the oil seals from being damaged by the sharp edges
Figure 19-1.
Use a seal driver or a socket to tap seals into place.
A—Using a seal driver. B—Using a socket.
A
B
Figure 19-2.
Compress the valve springs and install the keepers.
A—When using an L-head type compressor, place
the retainers on the spring and then compress the
assembly. B—Place the spring and retainers into
position and then insert the valve stem through them.
Reposition the retainer so it locks on the valve stem,
and then open the valve spring compressor.
A
B