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GENERAL
JET VALVE INSPECTION AND ADJUSTMENT
Y20CKOA
1.
Start the engine and allow it to warm up until the temper-
ature of the coolant reaches BOoC to 95°C (176°F to 203°F).
2.
Check the ignition timing and idling speed, and adjust if nec-
essary.
3.
Disconnect the air intake hose and air intake pipe.
4.
Remove rocker cover.
5.
Remove timing belt front upper cover.
6.
Turn crankshaft clockwise and align the camshaft sprocket
timing mark.
7.
Check that the jet valve clearance indicated in the diagram
is within specifications.
Jet valve
Clearance (at hot engine)
0.25 mm (0.010 in.)
~/=
Timing mark
Timing mark
(on camshaft sprocket)
(on cylinder head)
~
.'
20Y007
Intake valve side
NO.4 No 3
NO.2
NO.1
8.
If jet valve clearance is not within specifications, loosen
rocker arm adjusting screw locking nut. Use feeler gauge and
adjust jet valve clearance by turning adjusting screw.
9.
Secure rocker arm adjusting screw with screw driver so that
it will not rotate and tighten locking nut.
10. Rotate the crankshaft clockwise one complete revolution
(360 degrees).
11. Check that jet valve clearance indicated in the diagram is
within specifications.
12. Repeat steps 8 and 9 to adjust the clearance of remaining
valves.
Exhaust valve side
20YOO8
Intake valve side
NO.4 NO.3
NO.2
No.
20-16
Exha ust va Ive side
20Y010
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