Weichai America Corp.
Revision: August 2019 22
Illustration 7 Illustration 8
E. Rotate the crankshaft (360°) until the number 4 piston is on the compression stroke and
the timing pointer on the front cover is in line with the “TDC” mark on the vibration
dampener.
F. Using Illustration 10, adjust the four (4) valves corresponding with the cylinder 4 “TDC”.
Insert the correct feeler gauge between the rocker arm and valve stem tip. Loosen the
locknut and turn the valve adjustment screw until the rocker are and valve stem tip
contact the feeler gauge.
G. Tighten the locknut once the valve is adjusted properly. Remove the feeler gauge. A
very slight resistance should be felt when removing the feeler gauge.
NOTE
Ensure valve cover is completely seated and not resting on bolts or washers adjacent to
the valve cover.
H. Install gasket onto the valve cover and align the cover and gasket onto the cylinder
head. Tighten the valve cover mounting bolts to 36 in/lbs. Ensure valve cover gasket is
aligned before tightening.
With #1 piston at “TDC”, adjust these valves to: WP04GNA Exhaust 0.3mm/0.012” / Intake
0.2mm/0.008”;
INT EXH INT EXT
#1@TDC
1
1
2
3
Illustration 9
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