WM 90 Repair Reassembly Procedures
wc_tx000389gb.fm 63
8.11 Adjusting Valve Clearances
See Graphic: wc_gr001909 and wc_gr001910
Note: Check and adjust valve clearances when engine is cold.
8.11.1 Temporarily fit the flywheel in position.
8.11.2 Position the piston at the top dead center of the compression stroke by
matching the alignment mark on the flywheel (a) with the alignment
mark on the crankcase (b).
8.11.3 Loosen the nut (c) under the rocker arm. Position a feeler gauge (e)
as shown and turn the pivot bolt (d) until the clearance measures 0.07–
0.13 mm (0.0028–0.0051 in.). Tighten pivot bolt. Complete for both
intake and exhaust valves.
8.11.4 Check operation of the valves by turning the crankshaft. Recheck the
valve clearances.
wc_gr001910
c
d
e
wc_gr001909
a
b