Chery B11. Manual - part 54
Maintenance Manual for Chery·Oriental Son
Engine Section
39
end
of
valve rod
valve seat
(1)Assemble the valve and measure the flange height of
valve rod between the end of valve rod and seat
surface of valve spring. If the measurement value
exceeds the assigned limit value, the valve seat
should be replaced.
flange
height
of
l
d
seat surface
of
valve
i
Standard value: intake…………49.30mm
exhaust…………49.30mm
Limit value: intake…………49.80mm
exhaust …………49.80mm
Points for maintaining the valve seat
(1) Before maintaining the valve seat, check the
clearance between the valve duct and the valve rod.
Maintain after replacement of valve duct if
necessary.
(2) Repair the width and angle of the valve seat until
their adjustment to the assigned value with abrasion
machine.
(3) After repairing the valve seat, rub the valve and
the valve seat in pairs with rubbing cream. Then
check the flange height of valve rod. (Refer to the
checking item of valve seat).
Points for changing valve seat
(1)Cut a part of the to-be-replaced valve seat from the
inner side to make it thinner and then remove it.
(2)Repair and adjust the seat hole in cylinder cover
according to the outer diameter of the enlarged
valve seat.
Diameter of valve seat washer
enlargement size 0.30
34.435-34.455
intake
valve seat
enlargement size 0.60
34.735-34.755
enlargement size 0.30
31.935-31.955
exhaust
valve seat
enlargement size 0.60
32.235-32.255
(3)Before assemble the valve seat washer, heat
the cylinder cover to the temperature of
about 250℃, or cool the valve seat washer
in the liquid nitrogen in order to engage
inside the cylinder cover.
(4)Repair and adjust the valve seat to the
assigned width and angle with a valve seat
milling cutter. (Refer to Points for
maintaining the valve seat).
cut
height of valve
seat washer
enlarge the
inner
di
t