Service manual

【6-12】
E
NGINE
VALVE /VALVE GUIDE INSPECTION
● Inspect each valve for bending, burning, scratches or
abnormal stem wear.
If any defects are found, replace the valve with a new one.
Check valve movement in the guide.
● Measure each valve stem O.D.
● Measure each valve guide I.D.
● Subtract each valve stem O.D. from the corresponding guide
I.D. to obtain the stem-to-guide clearance.
Service limits: IN : 5.420mm replace if over
EX: 5.400mm replace if over
NOTE:
If the stem-to-guide clearance exceeds the service limits, replace
the cylinder head as necessary.
CYLINDER HEAD INPECTION
● Check the spark plug hole and valve areas for cracks.
● Check the cylinder head for warpage with a straight edge
and feeler gauge.
Service Limit:
0.05mm repair or replace if over
Torque Value:
Spark Plug 2.2 – 2.8kgf-m
VALVE SPRING INSPECTION
● Measure the free length of the inner and outer valve springs.
Service Limit: Inner: 30.0mm replace if below
Outer: 40.0mm replace if below