ZHEJIANG KAYO MOTOR CO., LTD.
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4.
Put cylinder head on the fixture, press the inlet and
exhaust valve springs, remove the inlet and exhaust
valve collets at last.
Note
: do not compress the springs too much to avoid
permanent deformation.
5.
Take out spring upper seat, spring, oil shied, air
inlet valve, exhaust valve, locating pin and spark plug
in sequence.
Overhauling cylinder head pars
1.
Inspect the cylinder head appearance and flatness.
- Check the combustor, air path, door line and clean
up the carbon deposit.
- make sure there is no crack on spark plug and valve
seat.
- make sure cylinder head oil path is open
- Check if the cylinder head with deformation, use
knife edge ruler and feeler gauge to check the flatness
of the cylinder head.
Flatness limit: 0.1mm
2.
Inspect the valve seat of cylinder head
- Smear a thin layer of stamp-pad ink evenly on the
valve seat, then put a clean valve on the valve seat, at
last gently knock on the valve, do not rotate, after that
pull out the valve, if the contact traces on the valve
working surface are interrupted, the valve seat should
be grind.
