MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
332
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-16-25 Installing the hydraulic clearance
adjuster and rocker arm
Attention:
Check the cylinder head bolts before
installation and conduct replacement when there is any
deformation, elongation, pulled thread or other faults.
(2) Install the hydraulic clearance adjuster and rocker
arm.
——Before installation, apply an appropriate amount of
lubricating oil to the ball head of the hydraulic clearance
adjuster. See Fig. 5-16-25.
Mobil API CI-4 lubricating oil
——Fit the ball head of the hydraulic clearance adjuster
into the clip at the rear of the rocker arm and ensure the
tappet will not fall off after installation.
——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, with the other side of the rocker arm overlapping
on the valve, as shown in Fig. 5-16-25.
(3) Install the intake and exhaust camshafts.
——Apply an appropriate amount of lubricating oil in the
bearing holes of intake and exhaust camshafts of
cylinder head and on the surface of the camshaft
journal.
Fig. 5-16-26 Installing the intake and exhaust
camshafts and the camshaft bearing cap
Mobil API CI-4 lubricating oil
——Install the intake and exhaust camshafts into the
cylinder head. See Fig. 5-16-26.
——Align the marks ―·‖ on the driving gears of exhaust
and intake camshafts and get it in line with the upper
surface.
(4) Install the camshaft bearing cap.
——Apply anaerobic plane sealant to the junction
surface between the camshaft bearing cap and the
cylinder head.
LOCTITE510 anaerobic plane sealant
——When installing the camshaft bearing cap, screw
down the 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.
Tightening torque for the fastening bolt of camshaft
bearing cap
9N·
m±3N·
m
Apply lubricating oil
Hydraulic clearance adjuster
Camshaft
bearing cap
Cylinder head