Fig. 28
Cylinder No.1’ \Cylinder No.1 exhaust
compression -. \ v/a
(2)
Valve Clearance Adjustment
The valve clearance must be adjusted every 1000 operating
hours, or whenever the valve rocker is abnormally noisy, or in an
engine malfunction though the fuel system is properly working.
Valve clearance : 0.20 mm (0.0078 in) (When the engine is cold.)
Adjustment Procedure
Turn the crankshaft clockwise so that the mark groove on the
crank pulley is aligned with the TDC mark (cast out) on the
timing gear case cover.
Remove the cylinder head cover and check to see if cylinder No.
1 is at TDC in the compression stroke or at TDC in the exhaust
stroke. When the intake and exhaust valves are closed, the
cylinder is at TDC in the compression stroke, and when only the
exhaust valve is open, it is at TDC in the exhaust stroke.
Fig. 29
59
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