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6. CYLINDER HEAD/VALVES People GT 125i
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
Item Standard (mm)
Valve clearance (cold) IN 0.1
EX 0.1
Cylinder head compression pressure 15kg-cm2
Cylinder head warpage
IN 25.965
Camshaft cam height EX 25.810
IN 10.0~10.015
Valve rocker arm I.D. EX 10.0~10.015
Valve rocker arm shaft IN 9.972~9.987
O.D. EX 9.972~9.987
IN 4.975~4.970
Valve stem O.D. EX 4.975~4.970
IN 5.0~5.012
Valve guide I.D. EX 5.0~5.012
Valve stem-to-guide IN 0.010~0.037
clearance EX 0.030~0.057
TORQUE VALUES
Cylinder head cover bolt 0.8~0.9 kgf-m
Tensioner mounting bolt 0.9 kgf-m
Tensioner sealing bolt 0.9 kgf-m
Cylinder head cap nut 2.0 kgf-m
Cylinder head bolt 0.7~1.1~ kgf-m
SPECIAL TOOLS
Valve spring compressor A120E00040
6-2