50
DE311A
5. Remove the Pre-Combustion Chamber Index Tool
and repeat steps 2-4 for the second pre-combustion
chamber; then install the glow plugs and tighten to
18 ft-lb.
6. Install the unit injectors (see Fuel/Lubrication/Cool-
ing).
7. Install the governor linkage (see Speed Governor in
this sub-section).
8. Install the camshaft (see Camshaft/Rocker Arms in
this sub-section). At this point, the cylinder head is
ready for installation on the engine block.
Installing
1. Prior to installing the cylinder head, a head gasket of
the correct thickness must be selected in order to
maintain adequate piston to cylinder head clearance.
To select the correct cylinder head gasket, use the
following procedure.
A. Rotate the crankshaft until one of the pistons is at
top-dead-center (TDC) as indicated by a dial indi-
cator.
DE330
B. Using a depth micrometer, measure and record
piston protrusion above the cylinder deck plane.
DE386
C. Use steps A and B to measure and record piston
protrusion on the other piston.
D. Use the piston with the highest protrusion to
select the appropriate gasket from the following
chart.
DE342A
DE343A
Piston Protrusion
Gasket Thickness
Hole Number
0.82-0.91 mm (0.032-
0.036 in.)
1.56-1.64 mm (0.061-
0.065 in.)
1
0.92-1.01 mm (0.036-
0.040 in.)
1.66-1.74 mm (0.065-
0.069 in.)
2
1.02-1.10 mm (0.040-
0.043 in.)
1.76-1.84 mm (0.069-
0.072 in.)
3
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