Sym Citycom.300i, Service Manual

Page: 130 / 270

6
. Cylinder Head / Valve
6-13
After the valve seat ground, coat valve seat
surface with emery and then slightly press the
ground surface.
Clean up all emery coated onto cylinder and valve
after ground.
Cylinder Head Reassembly
Lubricate valve stem with engine oil, and then
insert the valve into valve guide.
Install new valve stem oil seal.
Install valve springs and retainers.
Caution
 The closed coils of valve spring should face
down to combustion chamber.
Put the valve cotters onto valve spring retainer.
Use a valve cotter remove & assembly tool to
press the valve springs, and then install valves.
Caution

In order to avoid damaging the valve stem and
the cylinder head, in the combustion chamber
place a rag between the valve spring
remover/installer as compressing the valve
spring directly.
Special Service Tool:
Valve cotter remove & assembly tool
SYM-1471110-SY125
Tap the valve stems gently with a plastic hammer
to make sure valve retainer and valve cotter is
settled.
Caution

Place and hold cylinder head on to working
table so that can prevent from valve damaged.
Exhaust valve
Inlet valve
Valve stem seal
Valve spring
Valve spring retainer
Valve cotter
To this chapter contents
Valve cotter remove
and assembly tool