Chery QQ6 (S21) / S12LHD. Manual — part 88
1.3 Screw the cylinder pressure gauge joint slowly and
vertically into the spark plug hole. Do not screw too
tightly for fear that it may be difficult to disassemble.
1.4 Step down clutch pedal, start the engine and let it
run for about 5-6s, then fetch the numerical value.
2. Judgment of cylinder pressure value
2.1 Correct cylinder pressure
The standard cylinder pressure value should be
10-13.5bar. With use of engine, this value will fall, but
it should not be below 9bar with the pressure
difference among cylinders not exceeding 3bar.
2.2 In case cylinder pressure of engine is below the
standard value, it indicates deficiency of cylinder
pressure, the main cause of which may be untight
piston ring seal or valve. Please further analyze and
check.
When starting the engine,
ensure
adequate
quantity
of
electricity. Correct cylinder pressure can
only be measured out with revolution of
engine as 200-300r/min.
Chapter Five Disassembly of Power-assisted Steering System
I. Disassembly Procedure
1. Use a snap ring pliers to loosen the clamp on
connecting hose of steering fluid reservoir and steering
pump. Use a clean container to reclaim the steering fluid.
2. Use a 21# sleeve to remove the fixing bolt of steering
pump oil pipe.
Torque: 20+5Nm.
3. Use a 10# sleeve to loosen the (upper) fixing bolt of
steering pump adjusting bracket.
Torque: 20+5Nm.
4. Use a 10# sleeve to loosen the (lower) fixing bolt of
steering pump adjusting bracket.
Torque: 20+5Nm.
5. Use a 10# open end wrench to loosen the adjusting
bolt of steering pump bracket, and then pull the steering
pump upwards to loosen and take off the belt.
6. Use a 10# sleeve to loosen the connecting bolt of
steering pump and compressor bracket, pull out harness
connector, and then dismount the steering pump
assembly.
II. Overhaul
Steering pump can not be repair, if such failure as abnormal noise or oil leak exists, replace the
assembly.
III. Installation of the Steering Pump
1. Follow the order adverse to that of disassembly to install.
2. After installation of steering oil pump, duly adjust tightness of belt through adjusting bolt.
3. After power steering pump is properly installed, refill with special steering pump oil, and then
bleed air for the power steering pump after the engine starts.
4. Air bleeding method:
4.1 Hoist the vehicle to let its front wheels leave ground.
4.2 Turn the steering wheel left and right to the ends (duration for each time should not exceed 5s,
otherwise, the power steering pump is likely to be burnt out) until the oil pump does not make
sound. Note that oil storage kettle should not be lack of steering pump oil.
Note: when dismounting the
steering pump, please block the oil
pipe joint with clean cotton cloth.
Chapter Six Disassembly of A/C Compressor
I. Disassembly Procedure
Before disassembling the compressor, disassemble the steering oil pump first.
1. Use a 12# sleeve and a universal joint connecting rod to
loosen the connecting bolt of A/C high and low pressure
pipelines. (Note: if there is R134a in the condenser, use a
special equipment to reclaim first.)
After
the
pipeline
is
loosened, immediately block high
and low pressure holes of the compressor
with clean cotton cloth to avoid entry of
foreign material into the compressor!
2. Hoist the vehicle and then use a 13# sleeve to loosen the
fixing bolt of the compressor from underside.
Torque: 20+5Nm.
3. Lower the vehicle and then use a 13# sleeve to loosen
the fixing bolt of the compressor from upside. Use a 13#
sleeve to loosen the fixing bolt at middle of the
compressor, and then dismount the compressor assembly.
Torque: 20+5Nm.
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