6. CYLINDER HEAD/VALVES
6-5
DINK 50/ 125
TORQUE VALUES
(DINK 125)
Cylinder head cover bolt 1.2 kgf-m (12 N-m, 8.6 lbf-ft)
Tensioner mounting bolt 0.9 kgf-m (9 N-m, 6.5 lbf-ft)
Tensioner sealing bolt 0.9 kgf-m (9 N-m, 6.5 lbf-ft)
Cylinder head cap nut 2.2 kgf-m (22 N-m, 15.8 lbf-ft) Apply engine oil to threads
Cylinder head bolt 1 kgf-m (10 N-m, 7.2 lbf-ft)
SPECIAL TOOLS
Valve spring compressor A120E00040
TROUBLESHOOTING
• The poor cylinder head operation can be diagnosed by a compression test or by tracing engine
top-end noises.
Poor performance at idle speed White smoke from exhaust muffler
• Compression too low • Worn valve stem or valve guide
• Damaged valve stem oil seal
Compression too low
• Incorrect valve clearance adjustment Abnormal noise
• Burned or bend valves • Incorrect valve clearance adjustment
• Incorrect valve timing • Sticking valve or broken valve spring
• Broken valve spring • Damaged or worn camshaft
• Poor valve and seat contact • Worn cam chain tensioner
• Leaking cylinder head gasket • Worn camshaft and rocker arm
• Warped or cracked cylinder head
• Poorly installed spark plug
Compression too high
• Excessive carbon build-up in combustion
chamber
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