6. CYLINDER HEAD/VALVE SYM
6-2
PRECAUTIONS IN OPERATION
General Information
This chapter is contained maintenance and service for cylinder head, valve, and camshaft
as well as valve rocker arm.
Cylinder head service cannot be carried out when engine is in frame.
Specification unit: mm
Item Standard Limit
Compression pressure 12 kg/cm²
-
Intake 25.686~25.786 25.29
Camshaft Height of cam lobe
Exhaust 25.50~25.60 25.12
ID of valve rocker arm 10.000~10.015 10.10
Rocker
arm
OD of valve rocker arm shaft 9.972~9.987 9.910
Intake 4.975~4.99 4.90
OD of valve stem
Exhaust 4.955~4.97 4.90
ID of Guide 5.000~5.015 5.030
Intake 0.010~0.037 0.080
Clearance between
valve stem and guide
Exhaust 0.030~0.057 0.100
Outer 35.25
-
Valve
Free length of valve
spring
Inner 32.26~32.56
-
Torque Value
Cylinder head cover bolt 0.8~1.2kgf-m
Cylinder head bolt (LH) 0.8~1.2kgf-m
Bolt of timing chain auto-adjuster 0.8~1.2kgf-m
Spark plug 1.0~1.4kgf-m
Cam holder nut 1.0~1.4kgf-m
Valve adjustment fixing nuts 1.0~1.4kgf-m
TOOLS
Special service tools
Valve reamer: 5.0mm
Valve guide driver: 5.0mm
Valve spring compressor
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