MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
292
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-10-17 Installing the hydraulic clearance
adjuster and rocker arm
Rocker arm and hydraulic clearance adjuster
○
11
(1) Lubricate the ball head of the hydraulic clearance
adjuster with lubricating oil of proper amount, and then
embed it into the clip at the rear end of the rocker arm.
See Fig. 5-10-17.
(2) Lubricate the surfaces of the rocker arm and the
hydraulic clearance adjuster with lubricating oil again,
and then insert the whole part into the corresponding
hole orderly, with the other side of the rocker arm
overlapping on the valve.
Mobil API CI-4 lubricating oil.
Fig. 5-10-18 Installing the exhaust/intake
camshaft
Fig. 5-10-19 Installing the camshaft bearing
cap and applying sealant
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. 5-10-18.
(3) Align the marks ―·‖ on the drive gears of the intake
and exhaust camshafts.
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. 5-10-19.
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) from the center to both sides. See Fig.
5-9-20.
Tightening torque for the fastening bolt of camshaft
bearing cap
Hydraulic clearance adjuster
Lubrication
Cylinder head
Camshaft
Cylinder head
Camshaft
bearing cap
Apply the
sealant
