CYLINDER HEAD, CYLINDER, PISTON
CYLINDER HEAD, CYLINDER, PISTON
3-5-21
!
CAUTION
Before installing the camshaft or fi nally assembling the
engine, be sure to check the valve clearance
◆
Camshaft installation (see camshaft installation/
timing adjustment)
◆
Camshaft cover installation (see camshaft
installation/timing adjustment)
◆
Rotate the camshaft so that the lobes
【
C
】
and
【
D
】
of the cam above the valve to be measured
face up.
◆
Use a thickness gauge (feel gauge) to measure
the valve clearance
【
A
】
and
【
B
】
. If the gap
exceeds the requirement, record the measurement
result.
◆
Repeat the above steps until all valves are checked
Valve clearance requirements (cold)
exhaust: 0.2 ~ 0.25mm (0.0079" ~ 0.0098")
Air intake: 0.1 ~ 0.15mm (0.0039" ~ 0.0059")
◆
If the valve clearance measurement does not meet
the requirements, please remove the camshaft cover
and camshaft.
◆
Remove the valve lifter that does not meet the valve
clearance requirements.
TIPS
In order to ensure that the parts can be installed back to
the original position, the matching parts should be put
together and arranged according to their position on the
cylinder head. The removed parts should be marked or
placed on an arranged shelf.
◆
Record the 3 digits
【
A
】
at the bottom of the
tappet.
◆
Refer to the tappet selection matrix on the following
page to select a suitable tappet.
◆
Install the selected tappet.
◆
Repeat the above steps until all valve clearances
Valve clearance adjustment
A
B
C
D
A
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