Run In (Rev 1/97)
118
c.
If the rocker arms and push rods are tight, the num-
ber 1 cylinder is at top dead center of the exhaust
stroke. Rotate the engine 360 degrees to place the
number 1 cylinder at top dead center of the com-
pression stroke.
4. Check the valve clearance of both valves for the num-
ber 1 cylinder with a feeler gauge. Refer to Specifica-
tions for the recommended valve clearance.
5. Adjust the valves if necessary by loosening the lock nut
and turning the adjustment screw until the valve clear-
ance is correct.
Adjusting Valve Clearance
6. Hold the adjustment screw in place and tighten the lock
nut.
7. Recheck the valve clearance.
8. Rotate the engine in the normal direction of rotation
(counterclockwise from the flywheel end) until the
number 3 cylinder is at top dead center of the compres-
sion stroke.
a.
Check the rocker arms and push rods on the num-
ber 3 cylinder.
b. If the rocker arms and push rods are loose, the
number 3 cylinder is at top dead center of the com-
pression stroke.
aea317
c.
If the rocker arms and push rods are tight, the num-
ber 3 cylinder is at top dead center of the exhaust
stroke. Rotate the engine 360 degrees to place the
number 3 cylinder at top dead center of the com-
pression stroke.
9. Check and adjust both valves for the number 3 cylinder.
10. Rotate the engine in the normal direction of rotation
(counterclockwise from the flywheel end) until the
number 2 cylinder is at top dead center of the compres-
sion stroke.
a.
Check the rocker arms and push rods on the num-
ber 2 cylinder.
b. If the rocker arms and push rods are loose, the
number 2 cylinder is at top dead center of the com-
pression stroke.
c.
If the rocker arms and push rods are tight, the num-
ber 2 cylinder is at top dead center of the exhaust
stroke. Rotate the engine 360 degrees to place the
number 2 cylinder at top dead center of the com-
pression stroke.
11. Check and adjust both valves for the number 2 cylinder.
12. Install the valve cover.
Compression Test
Compression tester adapters are available for these engines.
Use Adapter P/N 204-672 and Glow Plug Adapter P/N 204-
675, if possible. Combustion chambers in diesel engines are
relatively small, and the compression ratios are relatively
high. Therefore, to obtain accurate and consistent compres-
sion readings:
•
The adapter used to connect a compression tester to an
engine must closely approximate the size and shape of
the part being replaced.