MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
294
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-10-23 Installing the heater water return
pipe component
Fig. 5-10-24 Installing the water outlet pipe
connecting pipe component
Fig. 5-10-25 Installing the components of fuel
return hose
condition, and embed it into the sealing groove of the
cylinder cover.
(3) Install the cylinder cover to the cylinder head, tighten
6 hexagon flange face bolts (M6×20) fastening the
cylinder cover to the cylinder head as per specified
torque. See Fig. 5-10-22.
Tightening torque for fastening bolt of cylinder
cover
9N·
m±3N·
m
Installing the heater water return pipe component
⑥
(1) Install the heater water return pipe component.
Tighten the 2 hexagon flange face bolts (M6×16)
connecting the heater water return pipe to the cylinder
cover.
(2) Tighten a hexagon flange face bolt (M8×16)
connecting the heater water pipe as per the specified
torque to the cylinder head. See Fig. 5-10-23.
Tightening torque for fastening bolt of heater water
return pipe component
M6×16
9N·
m±3N·
m
M8×16
23N·
m±3N·
m
Installing the water outlet pipe connecting pipe
component
⑤
(1) Install the water outlet pipe connecting pipe
component; tighten the two hexagon flange face bolts
(M8×16) to cylinder cover as per specified torque. See
Fig. 5-10-24.
Tightening torque for the fastening bolt of water
outlet pipe connecting pipe
23N·
m±3N·
m
(2) Connect the vacuum connecting pipe.
Installing the fuel return hose component
④
(1) Use the DELPHI fuel injector. Insert respectively the
fuel return rubber hoses into 4 injector heads and
position them in place. See Fig. 5-10-25.
Water outlet pipe
connecting pipe
component
Cylinder cover
Fuel return hose
component
Fuel inlet pipe
of injector
Fuel inlet pipe of fuel rail
