MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
282
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-9-26 Installing the cylinder cover
assembly
Fig. 5-9-27 Installing the heater water return
pipe component
Fig. 5-9-28 Installing the water outlet pipe
connecting pipe component
Installing the cylinder cover assembly
⑦
(1) Clean the inside of the sealing groove of the cylinder
cover.
(2) Check whether the cylinder cover packing is in good
condition.
(3) Embed the cylinder cover packing into the sealing
groove of the cylinder cover.
(4) 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. 5-9-26.
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. 5-9-27.
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. 5-9-28.
Tightening torque for the fastening bolt of water
outlet pipe connecting pipe
23N·
m±3N·
m
(2) Connect the vacuum connecting pipe.
Cylinder cover
Packing
Water outlet pipe
connecting pipe
component
Cylinder cover
