TK 61552-2-MM-EN
71
1.
Remove the rocker arm cover.
2.
Remove the round cover (plug) from the timing mark access hole on the front of the bell
housing.
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3.
Place the engine at top dead center of the compression stroke for the number one cylinder.
See steps a through d.
a.
Rotate the engine in the normal direction of rotation (clockwise viewed from the water
pump end) until the 1-4 timing mark on the flywheel lines up with the index mark in the
timing mark access hole.
Figure 41.
Top Dead Center One and Four
1.
Index Mark
2.
Top Dead Center Mark for 1 and 4
b.
Check the rocker arms on the number one cylinder to see if they are loose.
c.
If the rocker arms are loose, the engine is at top dead center of the compression stroke for
the number one cylinder.
d.
If the rocker arms are tight, the engine is at top dead center of the exhaust stroke for the
number one cylinder. Rotate the engine 360 degrees to place the engine at top dead
center of the compression stroke for the number one cylinder.
4.
Use a feeler gauge to check the valve clearance on both valves for the number one cylinder,
the intake valve for the number two cylinder, and the exhaust valve for the number three
cylinder. The valve clearance for both the intake valve and the exhaust valve should be 0.15 to
0.25 mm (0.006 to 0.010 in.).
a.
Check to verify that the valve stem cap is in good condition and is positioned squarely on
the top of the valve stem. Replace the valve stem cap if it shows significant wear.
5.
Adjust the valves if necessary by loosening the locknut and turning the adjustment screw
until the valve clearance is correct.
