6. Checking and Setting
6.1. Adjustment of Valve Clearance
6.1.1. General information
The valve clearances are to be adjusted at the times of the following situations.
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After initial 50 hourÕs operation.
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When the engine is overhauled and the cylinder heads are disassembled.
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When severe noise comes from valve train.
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When the engine is not normally operated, even though there is no trouble in the fuel system.
6.1.2. Adjusting order of the valve clearance
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Cylinder No. 1 begins from the rear side where the flywheel is mounted but cylinder No. 6
begins from the front side of the engine on the contrary.
Step 1:
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After letting the cylinder No.6 in the overlap TDC position by turning the crankshaft, adjust
the valves corresponding to " " of following figure. At this time cylinder No. 1 should be at
the ignition TDC position(O.T).
Step 2:
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After adjusting upper valves turn the crank pulley 360
û
to adjust the other valve clearance
until the cylinder No. 1 comes to overlap TDC position.
At this time cylinder No. 6 should be at the ignition TDC position(O.T).
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Adjust the valves corresponding to " " in upper figure.
After reconfirming the valve clearances, retighten it if necessary.
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