Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
335
Fig. 5-16-33 Installing the timing system
Tightening torque for the bolt and washer assembly
of camshaft timing pulley
110N·
m±5N·
m
(3) Align the timing marks on damping pulley and timing
hood II. See Fig. 5-16-32.
(4) Align the timing mark on the fuel pump pulley with
the horizontal bar on the water pump housing. See Fig.
5-16-33.
(5) Install the timing belt. During the installation, make
sure the belts, except the timing tension pulley, are
connected with the pulley firmly and without any
looseness.
(6) Install the timing tension pulley. Fix the limit bracket
of the timing tension pulley in the place where the bowl
shaped plug is to be installed on the cylinder head, and
then use a hexagon socket head spanner to turn the
mounting pin hole clockwise until it deflects from the
vertical direction by 30° and the tension pulley arm
indicator deflects from the lower verge of the installation
arm notch by 1°~2°, and tighten the fastening bolts.
After taking off the hexagon socket spanner, camshaft
pulley dowel pin and crankshaft locking tooling, turn the
crankshaft by 2 circles clockwise with the spanner to
make sure the damping pulley, camshaft timing pulley
and fuel pump pulley align with the corresponding
timing marks and the belt fits properly. If there is any
pulley that is not aligned properly, loosen the fastening
bolts of timing pulley and install them again to align the
pulley properly. This is to make one cylinder just at the
top dead center of the compression stroke, and the
valve timing is accurate. See Fig. 5-16-35.
Fig. 5-16-34 Installing the timing pulley
Attention:
When the pulley mark is not aligned, if it
is required to turn the vehicle or carry out inspection, do
not turn the vehicle anticlockwise. See Fig. 5-16-35.
Tightening torque for the fastening bolt of timing
tension pulley
22N·
m~26N·
m
(7) Install the timing cover and timing cover component
I. Fix 10 hexagon flange face bolts (M6×16, M10×35
and M10×50) tightly to the cylinder head and the front of
the cylinder body. See Fig. 5-16-36.
Tightening torque for the fastening bolt of timing
hood
Horizontal bar
Timing mark
Fuel pump pulley
Timing pulley
Timing tension
pulley
