CPI GTR180 Service Manual page 48

CPI MOTOR
VII.CYLINDER HEAD & CAM SHAFT REMOVAL
SERVICE INFORMATION
GENERAL INSTRUCTIONS
The cylinder head can be serviced with the engine installed in the frame. Coolant in the radiator and water
jacket must be drained first.
When assembling, apply molybdenum disulfide grease or engine oil to the valve guide movable parts and
valve arm sliding surfaces for initial lubrication.
The valve rocker arms are lubricated by engine oil through the cylinder head engine oil passages.
Clean and unclog the oil passages before assembling the cylinder head.
After disassembly, clean the removed parts and dry them with compressed air before inspection.
After removal, mark and arrange the removed parts in order. When assembling, install them in the reverse
order of removal.
SPECIFICATIONS
Valve clearance(cold)
Cylinder head compression pressure
Cylinder head warpage
Camshaft cam height
Valve rocker arm I.D.
Valve rocker arm shaft
O.D.
Valve seat width
Valve stem O.D.
Valve guide I.D.
Standard (mm)
IN
EX
12±2 kg/cm2
IN
26.540
EX
26.050
IN
10.000~10.018
EX
10.000~10.018
IN
9.972~9.987
EX
9.972~9.987
IN
1.000
EX
1.000
IN
4.990~4.975
EX
4.970~4.955
IN
5.00~5.012
EX
5.00~5.012
Service Limit (mm)
0.06
0.08
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GTR180
---
---
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0.05
26.142
25.651
10.100
10.100
9.9
9.9
1.600
1.600
4.925
4.915
5.03
5.03