Run In (Rev 1/97)
117
Three Cylinder Procedure
1. Remove the valve cover.
2. Torque the cylinder head bolts to the proper torque.
NOTE: The cylinders on these engines are numbered
from the flywheel end to the water pump end. The
number 1 cylinder is next to the flywheel. The number
2 cylinder is in the middle and the number 3 cylinder
is next to the water pump. The timing marks on the
flywheel are also numbered this way.
The timing marks on the flywheel of the three cylinder
engines are stamped 120 degrees apart. The top dead
center marks have the cylinder number stamped next
to them. The injection timing marks have no identifi-
cation marks.
The index timing mark is stamped on the side of the
starter mounting plate that faces the flywheel. This
timing mark is on the intake side of the engine.
Timing Marks
On the three cylinder engines the order for the fly-
wheel timing marks is 1, 2, 3, but the firing order is
1,3,2. The reason for this is that the engine fires every
240 degrees of crankshaft rotation. Therefore, when
adjusting the valves, check the number 1 cylinder
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first. Then rotate the engine past the number 2 cylin-
der timing marks to the number 3 cylinder timing
marks and check the number 3 cylinder. Finally,
rotate the engine past the number 1 cylinder timing
marks to the number 2 cylinder timing marks and
check the number 2 cylinder.
Valve Adjustment and Firing Order
CAUTION: Before turning the engine by hand,
loosen all the injection lines at the injection nozzles to
prevent the any possibility that the engine might fire.
3. Rotate the engine in the normal direction of rotation
(counterclockwise from the flywheel end) until the
number 1 cylinder is at top dead center of the compres-
sion stroke.
a. Check the rocker arms and push rods on the
number 1 cylinder.
b. If the rocker arms and push rods are loose, the
number 1 cylinder is at top dead center of the com-
pression stroke.
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