Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
267
Fig. 5-8-11 Installing the exhaust/intake
camshaft
Fig. 5-8-12 Installing the camshaft bearing
cap and applying sealant
Fig. 5-8-13 Installation for camshaft bearing
cap
Installing the intake/exhaust camshaft assembly
⑩
(1) Apply a small amount of lubricating oil to the surface
of the camshaft journal and inside the bearing holes of
the intake and exhaust camshafts in the cylinder head.
Mobil API CI-4 lubricating oil.
(2) Install the intake and exhaust camshafts into the
cylinder head as shown in Fig. 5-8-11.
(3) Align th
e marks ―
·
‖ on the drive gears of the intake
and exhaust camshafts, and make these marks flush
with the upper plane.
Axial clearance of camshaft
Standard
0.060~0.115mm
Installing the camshaft bearing cap
⑨
(1) Apply the anaerobic plane sealant to the junction
surface between the camshaft bearing cap and the
cylinder head. See Fig. 5-8-12.
LOCTITE510 anaerobic plane sealant.
Prompt:
If the original cylinder head is still used, the
junction surface between the camshaft bearing cap and
the cylinder head should be cleaned before being
spread with sealant.
(2) When installing the camshaft bearing cap, screw
down 16 hexagon flange face bolts (M6×35) of
camshaft bearing cap as per specified torque and order,
then tighten the surrounding 6 hexagon flange face
bolts (M6×20). See Fig. 5-8-13.
Tightening torque for the fastening bolt of camshaft
bearing cap
9N·
m±3N·
m
(3) Install the plug cover and the front oil seal of
camshaft: apply an appropriate amount of lubricating oil
to the front oil seal lip and cylindrical surfaces of both
front oil seal and camshaft plug cover. Use the special
tool to install the front oil seal and plug cover to the
corresponding holes properly without any oil leakage.
Mobil API CI-4 lubricating oil.
(4) Install the vacuum pump. Tighten the hexagon
flange face bolt (M6×20) connecting the vacuum pump
and the camshaft bearing cap as per specified torque.
Tightening torque for vacuum pump fastening bolt
9N·
m±3N·
m
Camshaft
Cylinder head
Camshaft
bearing cap
Apply the
sealant
Cylinder head
Camshaft
bearing
cap
Cylinder head
