MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
146
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
(3) Align the timing marks on damping pulley and timing
hood II. See Fig. 4-2-24.
(4) Align the timing mark on fuel pump pulley with the
horizontal bar on water pump shell. See fig. 4-2-25.
Fig. 4-2-26 Installing the timing belt
Fig. 4-2-27 Installing the timing tension pulley
Fig. 4-2-28 Installing the timing hood
component
(5) Install the timing belt. During the installation, make
sure the belts, except the timing tension pulley, are
connected with the pulley firmly without any looseness,
as shown in Fig. 4-2-26.
(6) Install the timing tension pulley. Fix the limit bracket
of the timing tension pulley in the place where the bowl
shaped plug is installed on the cylinder head first, and
then use a hexagon socket head spanner to turn the
pinhole-mounting position clockwise until it is slightly
over 30° past the vertical direction and the tension
pulley arm indicator is 1°~2° past the lower verge of the
installation arm notch, and tighten the fastening bolts.
After taking off the hexagon socket head spanner,
camshaft pulley dowel pin and crankshaft locking
tooling, turn the crankshaft 2 circles clockwise with the
spanner to make sure the damping pulley, camshaft
timing pulley and fuel pump pulley align with the timing
mark and the belt fits properly. If there is any pulley that
is not aligned properly, loosen the fasting bolt of timing
pulley and install them again to align the pulley properly.
So that one cylinder is just at the top dead center of the
compression stroke and the valve timing is accurate, as
shown in Fig. 4-2-27.
Attention:
If any pulley mark is not aligned and it
is required to turn the vehicle to align or inspect it, never
turn the vehicle anticlockwise. See Fig. 4-2-27.
Tightening torque for timing tension pulley bolt
22 N·
m
～
26 N·
m
(7) Install the timing hood and timing hood component I,
and screw down 10 hexagon flange bolts (M6×16,
M10×35 and M10×50) to the front end of cylinder head
and cylinder body by using the specified torque. See
Fig. 4-2-28.
Tightening torque for fastening bolt of timing hood
45 N·
m±3 N·
m
Tightening torque for fastening bolt of timing hood
component I
9 N·
m±3 N·
m
Timing pulley
Timing
tension pulley
Use a hexagon
socket head
spanner to adjust
the mounting hole.
Analog
Notch
