MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
238
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-4-8 Installing the fuel inlet pipe of
high-pressure fuel rail
Fig. 5-4-9 Installing the air outlet pipe of EGR
condenser
Installing the turbocharger pressure sensor
⑤
(1) Check whether the O-ring on turbocharger pressure
sensor is installed properly.
Install the turbocharger pressure sensor to the sensor
hole of constant pressure chamber of air intake
manifold pipe.
(2) Tighten the 2 hexagon flange bolts (M6×10)
fastening the turbocharger pressure sensor bracket
according to the specified torque. See Fig. 5-4-7.
(3) Connect the harness connector of turbocharger
pressure sensor.
Tightening torque for fastening bolt of turbocharger
pressure sensor
9N·
m±3N·
m
There should be no air leakage after installation.
Installing the fuel inlet pipe of high-pressure fuel
rail
④
(1) Install the fuel inlet pipe of high-pressure fuel rail
and tighten evenly the pipe connectors at both ends of
the fuel inlet pipe of high-pressure fuel rail according to
the specified torque. See Fig. 5-4-8.
(2) Tighten the hexagon flange bolt (M6×12) fastening
the fuel inlet pipe of high-pressure fuel rail according to
the specified torque.
Attention:
There are 2 rubber pads in the fuel inlet
pipe clamp of high-
pressure fuel rail. Don’t forget to
install them.
Tightening torque for fastening bolt of fuel inlet
pipe connector and clamp
Fuel inlet pipe connector
of high-pressure fuel rail
23N·
m±3N·
m
Fuel inlet pipe clamp of
high-pressure fuel rail
9N·
m±3N·
m
Installing the EGR valve and air outlet pipe of EGR
condenser
③
(1) Install the EGR valve and air outlet port gasket of
EGR valve to the air intake manifold pipe and tighten
the 2 hexagon flange nuts according to the specified
torque.
High-pressure
fuel rail
Fuel inlet pipe of
high-pressure
fuel rail
EGR valve
assembly
Air outlet pipe of
EGR condenser
