MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
444
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 8-2-36 Removing and installing the upper
body of oil pan
Fig. 8-2-37 Installing the upper body of oil pan
Fig. 8-2-38 installing the oil collector
assembly
LOCTITE587 flat sealant.
Attention:
Make sure the joint surface between
the upper body of oil pan and the cylinder body is clean
before reapplying sealant.
(2) Screw down 12 hexagon flange bolts
（
M6 X20 & M8
X45) fastening the upper body of oil pan according to
the specified torque and order as shown in Fig. 8-2-37.
The upper body of oil pan and cylinder body
should fit closely after the installation.
Tightening torque of fastening bolt of oil pan upper
body
Bolt specification
Tightening torque
M6
9 N
• m±3 N • m
M8
23 N
• m± 3 N • m
Installing the oil collector
③
(1) Apply appropriate volume of lubricating oil to the oil
collector seal.
Mobil API CI4 lubricating oil
(2) Align the oil collector with the oil suction hole of oil
pan and put the oil collector gasket into it and tighten it
with 2 hexagon flange bolts (M8 x 16).
Attention:
Screw down and install 2 hexagon
flange bolts (M6×12) on the oil collector after installing
the upper body of oil pan as shown in Fig. 8-2-38.
Tightening torque for fastening bolt of oil collector
M6
9
N • m±3 N • m
M8
23 N • m± 3 N • m
Installing the lower body assembly of oil pan
②
(1) Check the junction surface between upper and lower
bodies of oil pan for dirt and scratch.
(2) Apply the silicon rubber sealant on the junction
surface between the lower and upper bodies of oil pan.
LOCTITE587 flat sealant.
(3) Install the lower body of oil pan to the upper body
and screw down 14 hexagon flange bolts (M6x12)
according to the specified torque and order as shown in
Upper body of
oil pan
Lower body of
oil pan
Oil collector
Cylinder body
Upper body of
oil pan
