Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
353
Fig. 5-19-19 Installing the lower cylinder body
Fig. 5-19-20 Installing main bearing cap bolt
Fig. 5-19-21 Installing the rear oil seal of
crankshaft
Attention:
Before applying the sealant to the top
surface of lower cylinder body, make sure the joint of
the upper and lower cylinder bodies are clean.
Tightening torques of fastening bolts of the main
bearing cap and the lower cylinder body
Main bearing cap bolt
(screw it down tightly by
three steps)
40N·
m±3N·
m
Turn for 90°: then turn for
another 90°
Hexagon flange face bolt
(M8×80)
23N·
m±3N·
m
After the installation, rotate the crankshaft
manually, and the crankshaft should rotate freely
without any seizure.
Installing the rear oil seal of crankshaft
○
12
(1) Check the crankshaft rear oil seal to be installed and
make sure it is clean without impurity.
(2) Apply an appropriate amount of lubricating oil to the
lip oil groove and the cylindrical surface of the oil seal
assembly.
Mobil API CI-4 lubricating oil
(3) Use a special tool to install the rear oil seal of the
crankshaft to the oil seal groove of the cylinder body.
See Fig. 5-19-21.
Rear oil seal installer: 5-8840-2539-0.
Caution:
make sure the oil seal end face does not
tilt and it is properly installed.
Fig. 5-19-22 Installing the connecting rod
Installing the piston connecting rod assembly
○
11
(1) Carefully remove dirt on the back of connecting rod
bearing shell and matching surface of connecting rod
bearing seat.
(2) Install the connecting rod bearing shell in the same
group to the connecting rod as per the numbers marked
during the removal. See Fig. 5-19-22.
(3) Apply an appropriate amount of engine oil to the
cylinder bore, the connecting rod bearing shell and the
crank pin.
Mobil API CI-4 lubricating oil
Front
end
Lubricate it with oil
Cylinder body
Rear oil seal
