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6. CYLINDER HEAD/VALVES 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
6-5