Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
331
Fig. 5-16-22 Installing the oil pan lower body
and the oil collector
Fig. 5-16-23 Installing the lower body of oil
pan and tightening the bolts in order
Fig. 5-16-24 Installing the cylinder head and
tightening the bolts in order
(4) Check the junction surface between the oil pan
lower body and upper body for dirt and scratches. Apply
silastic plane sealant to the junction surface evenly, and
then install the lower body to the upper body by tighten
the 14 hexagon flange face bolts (M6×12) to the
specified torque in order. See Fig. 5-16-23.
LOCTITE587 plane sealant
Tightening torque for the fastening bolt of oil pan
lower body
9N·
m±3N·
m
Attention:
——Many fastening bolts are installed on the oil pan,
and all the bolts should be tightened. Otherwise, oil
leakage may occur.
——Before applying sealant again, make sure the
junction surface between the upper and lower bodies of
oil pan is clean.
Installing the cylinder head assembly
④
(1) Install the cylinder head.
——Check the junction surface between the cylinder
head and the cylinder body for foreign matters, and
wipe it by silk cloth.
——Insert the cylinder head dowel pin sleeve into the
corresponding pin hole on the cylinder body properly
with a special tool; fit the cylinder head gasket to the
dowel pin of the cylinder body, and evenly place the
gasket on the cylinder body plane.
Make sure the cylinder head gasket is in the right
direction after installation.
——Fix the cylinder head to the cylinder body, and align
the 10 screw holes, then fit and screw the 10 fastening
bolts (M11×1.5×162) by three steps according to the
specified sequence. See Fig. 5-16-24.
Tightening torque for the fastening bolt of cylinder
head
Step 1
Step 2
Step 3
50N·
m±3N·
m
Turn it for 90°
Turn it for 120°
Upper body of
oil pan
Lower
body of oil
pan
Cylinder
head bolt
Cylinder head
