6. CYLINDER HEAD/VALVE TGB
6-2
PRECAUTIONS IN OPERATION
General Information
y
This chapter is contained maintenance and service for cylinder head, valve, and camshaft
as well as valve rocker arm.
y
Cylinder head service cannot be carried out when engine is in frame.
Specification unit:
mm
Item Standard
Limit
Compression pressure
12 ± 2 kg/cm²
-
Intake 25.736
-
Camshaft
Height of cam lobe
Exhaust 25.55
-
ID of valve rocker arm
10.00
10.000~10.015
Rocker
arm
OD of valve rocker arm shaft
10.00
9.985~10.00
Intake 5.00 4.975~4.99
OD of valve stem
Exhaust 5.00 4.97~4.98
OD of Guide
5.00
5.030
Intake 0.010~0.037
0.080
Clearance between
valve stem and guide
Exhaust 0.030~0.057
0.100
Free length of valve spring
32.410
-
Valve
Valve seat width
1.000
1.600
Connection Flatness of cylinder head
- 0.050
Torque Value
Cylinder head cover bolt
0.8~1.2kgf-m
Cylinder head bolt (LH)
0.8~1.2kgf-m
Cylinder head Nut
1.0~1.4kgf-m (apply with oil on bolt thread & seat)
Sealing bolt of timing chain auto-adjuster 0.8~1.2kgf-m
Bolt of timing chain auto-adjuster
0.8~1.2kgf-m
Timing gear cover bolts
0.7~1.1kgf-m (apply with oil on bolt thread & seat)
Spark plug
1.0~1.4kgf-m
TOOLS
Special service tools
Valve reamer: 5.0mm
Valve guide driver: 5.0mm
Valve spring compressor
