Cylinder Head Assembly - Sym MB10A7-A series Service Manual

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Cylinder Head Assembly

Lubricate the valve stem with engine oil, and
then insert the valve into valve guide.
Install the new valve stem oil seal.
Install the valve springs, retainer and valve
cotters.
Install the valve by using valve assemble tool.
Special tool：
Valve cotter remove / assemble tool
SYM-1471120
Valve spring compressor
SYM-1471100
Caution
To avoid damaging the valve stem and
the cylinder head, put a rag under the
cylinder head when compressing the
valve spring.
Caution
Tightly wound coils face the combustion
chamber.
Tap the valve stem slightly with rubber
hammer to make valve cotters and valve stem
match perfectly.
Caution
Place and hold cylinder head on to
working table to prevent valve from being
damaged.
Lubricate the valve rocker arm, rocker arm
shaft and cam shaft with engine oil.
Install the cam shaft, valve rocker arm and
rocker arm shaft onto the cylinder head.
Install the cylinder head right side cover (4
bolts).
Torque value：0.8~1.2kgf-m
To this chapter contents
Valve cotters
Valve spring
retainer
Valve
springs
Tightly wound coils facing the combustion chamber
7. Cylinder Head / Valve
Valve stem
seal
Valve
Valve cotters
4 bolts
7-15