Chery A18. Manual - part 32
Grinding valve and valve seat ring
UAES’s new
two-valve
Face angle of intake valve
44º30′---45º30′
Width of the sealing band
for the intake valve seat
ring
1.75---2.32mm
Face angle of exhaust
valve
91º (0º-0º30ˊ)
Width of the sealing band
for the exhaust valve seat
ring
1.44±0.1
Installation
Before installation, the cylinder head shall be
completely cleaned and there shall be no any trace
of abrasive dust on the cylinder head, valve or
valve guide.
Lubricate the valve stem and valve guide bore with
clean motor oil.
Install the valve. The assembly shall be completed
according to the original valve indicators.
Note: The intake valves are interchangeable, but
the exhaust valves are not.
Press the valve oil seal and spring seat assembly
into the upper end of the valve guide, apply some
motor oil on the guide opening or the edge of the
valve oil seal and wrap the glove of the valve cotter
by adhesive tape. After the valve is installed, take
away the adhesive tape.
Install the valve spring and valve spring seat,
compress the valve spring seat to the stroke that
enables the valve cotter groove to appear by special
compression device and install the cotter. Then
slowly release the compression device and remove
it.
After the whole valve cotter is installed, put the
cylinder head on a piece of wood and knock at the
small end of the valve stem by a plastic or copper
hammer to help the valve mechanism to be in place
better.