Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
275
Fig. 5-9-5 Removing the fuel inlet pipe and
fuel return hose component of the fuel injector
——When removing the fuel inlet pipes of injector and
rail, loosen evenly and simultaneously the connectors
fastening both ends of the fuel pipe to avoid
deformation of the pipe.
——After removing the fuel inlet pipes of fuel injector
and fuel rail, use clean plug covers to cover the fuel inlet
of fuel injection circuit, the fuel port of high-pressure fuel
rail and both ends of fuel inlet pipe of fuel injector to
prevent impurities from blocking the fuel injector.
Removing the fuel return hose component
④
(1) Remove the fuel return hose bracket and clamp.
(2) Use the DELPHI fuel injector. Uninstall respectively
the 4 fuel return hoses connecting to the fuel injector,
and take off the components of fuel return hoses. See
Fig. 5-9-5.
(3) Use the BOSCH or XINFENG fuel injector. Use a
tool to push out the clip, pull out the fuel return
connector from the fuel injection circuit, and then
remove fuel return hose component.
Fig. 5-9-6 Removing heater water return pipe
component
Removing the water outlet pipe connecting pipe
component
⑤
(1) Uninstall the vacuum connecting pipe.
(2) Remove 2 hexagon flange face bolts (M8×16) fixing
the connecting water outlet pipe, and take off the water
outlet pipe connecting component. See Fig. 5-9-7.
Removing the heater water return pipe component
⑥
(1) Remove the 2 hexagon flange face bolts (M6×16)
connecting the heater water return pipe component to
the cylinder cover.
(2) Remove 1 hexagon flange face bolt (M8×16)
connecting the heater water return pipe component to
the cylinder cover. See Fig. 5-9-6.
(3) Take off the heater water return pipe component
from the cylinder head.
Removing the cylinder cover assembly
⑦
(1) Remove the 16 hexagon flange face bolts (M6×20)
fastening the cylinder cover to the cylinder head, and
take off the cylinder cover. See Fig. 5-9-7.
(2) Take out the packing from the sealing groove of
cylinder cover.
Fuel return hose
component
Fuel inlet pipe
of injector
Fuel inlet pipe of fuel rail
Water outlet pipe
connecting pipe
component
Cylinder cover
Cylinder cover
packing
