Service manual

3-11
E
INSP
ADJ
POWER UNIT
4. Measure:
• Valve clearance
Out of specification
→
Adjust.
Valve clearance (cold):
Intake valve:
0.11–0.20 mm
(0.0043–0.0079 in)
Exhaust valve:
0.25–0.34 mm
(0.0098–0.0134 in)
Measurement steps:
• Turn the drive coupling counterclockwise,
and then check if cylinder #1 is at TDC of
the compression stroke with a dial gauge.
NOTE:
TDC on the compression stroke can be
found when the camshaft lobes are turned
away from each other.
• Measure the valve clearance with a thick-
ness gauge
1
.
NOTE:
• If the valve clearance is incorrect, record
the measured reading.
• Measure the valve clearance in the follow-
ing sequence.
Valve clearance measuring sequence
Cylinder #1
→
#2
→
#4
→
#3
È
Bow side
• To measure the valve clearances of the
other cylinders, starting with cylinder #1
at TDC, turn the drive coupling counter-
clockwise as specified in the following
table.
É
Degrees that the crankshaft is turned clock-
wise
Ê
Cylinder
Ë
Combustion cycle
Cylinder #2 180°
Cylinder #4 360°
Cylinder #3 540°
IN
EX
1
7205403601800
#4
#3
#2
#1
É
Ê
Ë
Ë
Ë
Ë