slowly until indicator reading is 0.010-then stop
assemblies back out of the way. Remove the in-
(13) Scribe a second line on the crankshaft
(4) Carefully place (do not drop) a welding rod
pulley in the same manner as in step 10.
or drill rod approximately 12 inches long through
(14) Scribe a third line halfway between the
the injector hole and on top of the piston. With the
first two lines. This is positive top-dead-center.
throttle in the NO FUEL position, bar the
Remove the indicator from the engine.
crankshaft slowly in the direction of rotation of the
engine, and stop barring when the rod reaches
the end of its upward travel. Remove the rod and
Make sure that the crankshaft pulley retaining bolt is
not loosened during the turning operation. The bolt
bar the crankshaft opposite the direction of rotation
may be tightened to a torque of 200-220 foot-pounds
between 1/16 and 1/8 of a turn.
if it becomes loose.
(5) Select a dial indicator having 0.001 inch
graduations and with a spindle movement of at
(15) Remove dial indicator and welding rod or
least 1 inch. Use suitable mounting attachments for
drill rod from injector tube.
the indicator so that it can be mounted over the
(16) Install injector assembly and tighten the
injector hole in the cylinder head. Provide an ex-
injector clamp bolt to 25-30 foot-pounds torque.
tension for the spindle of the indicator. The ex-
Swing the injector and valve rocker arm back into
tension must be long enough to contact the piston
position and install rocker arm brackets and tighten
as it is approaching its upper position.
b o l t s to 50-55 foot-pounds torque. Adjust the
(6) Mount the indicator over the injector hole
exhaust valve clearance and time the injector. Turn
and tighten mountings sufficiently to hold the
engine over until the exhaust valves in the selected
cylinder are completely open.
(17) Install the dial indicator once again so
The mounting leg may be threaded into the rocker
that the spindle of the indicator rests on top of the
rover retaining screw hole on the injector rack side of
injector follower. Set indicator dial to "0". Bar the
the cylinder head. Make sure that the spindle ex-
crankshaft slowly in the direction of rotation, and
tension is free in the injector hole, does not bind, and
stop when TDC mark on the crankshaft pulley
is free to travel its full 1 inch movement.
lines up with the pointer.
(7) Provide a suitable pointer and attach it to
(18) When checking the engine timing, note
the lower engine front cover. Pointer should extend
the reading on the indicator and compare it with
over the crankshaft pulley.
the dimensions listed below for the camshaft being
(8) Turn the crankshaft in the direction of
rotation slowly until the hand on the dial indicator
(a) If the indicator reading is 0.204 to 0.207
just stops moving.
inch, the engine is in time.
(9) Turn the crankshaft in the direction of
(b) If the indicator reading is 0.177 to 0.180
rotation until the indicator hand just starts to move.
inch, the timing is one tooth retarded.
Reset dial to 0. Continue barring slowly until in-
(c) If the indicator reading is 0.234 to 0.237
dicator reading is 0.010-then stop turning.
inch. the timing is one tooth advanced.
(10) Scribe a line on the crankshaft pulley in
(19) After completing the timing check,
line with the end of the pointer.
remove the dial indicator; remove shipping caps
( 1 1 ) T u r n t h e c r a n k s h a f t o p p o s i t e the
from injector fuel fittings, and install the injector
direction of rotation slowly until the hand on the
fuel pipes, making sure that they are tightened to
dial indicator just stops moving.
prevent any fuel leaks. Remove the pointer at-
( 1 2 ) T u r n t h e c r a n k s h a f t o p p o s i t e the
tached to the front of the engine.
direction of rotation until the indicator hand just
(20) Install the cylinder head rocker arm cover
starts to move. Reset dial to O. Continue barring
( T M 10-3930-242-12).
Section VI. CYLINDER BLOCK AND RADIATOR
3-35. Cylinder Block and End Plate
injectors, thus eliminating oil tubing and con-
nections throughout the block. The model number
a. General. The cylinder block is a one-piece
and serial number are stamped on right-hand side
casting, serving as the main structural part of the
of cylinder block on the upper rear corner. The
engine. A flat steel plate is bolted to the rear end of
radiator is bolted to the front of the engine base and
the cylinder block to provide a means of attaching
the flywheel housing, camshaft and crankshaft
is used for cooling the engine.
cover. The block has drilled passages for carrying
lubricating oil to all moving parts, and fuel to the
(1) Remove the engine (para 2-9).