Chapter II Technical Information of Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
61
Fig. 2-12-17 Checking the opening
temperature of thermostat valve
Fig. 2-12-18 Checking the lift of thermostat
valve
Fig. 2-12-19 Adjusting the idling speed
88
℃
The thermostat should be replaced if the opening
temperature of valve is not correspondent with
provisions.
(5) Check the lift when the valve is completely opened.
See Fig. 2-12-18.
Lift when the valve is completely opened
When the water temperature is at 88
℃
>8.5 mm
If the lift of thermostat is not correspondent with
provisions, the thermostat should be replaced.
(6) Check if the valve is closed when the thermostat is at
a low temperature.
The thermostat should be replaced if the valve cannot be
closed.
(7) Check if the thermostat rubber sealing ring is aged
and deformed; the sealing ring should be replaced if it is
aged and deformed.
6. Engine Control
6.1 Check idling speed
(1) Operate the parking brake and brake the driving
wheels
(2) Place the transmission to neutral gear.
(3) Start the diesel engine and heat it.
(4) Remove the diesel engine control cable from the
control rod.
(5) Mount the tachometer on the diesel engine.
Check the idling speed of the diesel engine: if the
idling speed exceeds the specified range, it should be
adjusted in the service station authorized by our
company.
Idling speed of the diesel engine
750 r/min ± 50 r/min
The lift of valve should be at least 8.5 mm
when the water temperature is 88
℃
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