MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
484
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 12-3-5 Removing the rear exhaust pipe
Fig. 12-3-6 Installing the rear exhaust pipe and
muffler
(2) Install the rear exhaust pipe on its bracket and
tighten the clamp. See Fig. 12-3-6.
Installing the Muffler
③
(1) Install the muffler on its bracket. See Fig.
12-3-6.
(2) Connect the rear exhaust pipe with the muffler,
install the sealing gasket, and screw down the bolt
and nut as per the specified torque.
Tightening torque for the connecting bolt and
nut of muffler and rear exhaust pipe:
45 N • m ± 3 N • m
Installing the Front Exhaust Pipe
②
(1) Install the front exhaust manifold to the bracket
of front exhaust pipe. See Fig. 12-3-7.
(2) Connect the front exhaust pipe with the muffler,
install the sealing gasket, and screw down the bolt
and nut as per the specified torque. See Fig.
12-3-7.
Tightening torque for the connecting bolt and
nut of muffler and front exhaust pipe:
45 N • m ± 3 N • m
Fig. 12-3-7 Installing the front exhaust pipe
Install the Catalytic Converter Pipe
①
(1) Connect the catalytic converter pipe with the
turbocharger and the front exhaust pipe, install the
sealing gasket to both ends, and then use the
specified tightening torque to screw down the bolt
and nut which connect with the front exhaust pipe.
Tightening torque for the bolt and nut of
catalytic converter pipe and front exhaust pipe:
45 N • m ± 5 N • m
(2) For the engine equipped with a VGT
turbocharger, you screw down the fastening nuts
which connect with the catalytic converter pipe and
the turbocharger as per the specified torque.
Front exhaust pipe
Muffler
Muffler
Rear exhaust pipe
