MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
436
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 8-2-18 Installing the timing system
Fig. 8-2-19 Installing the camshaft timing
pulley
Fig. 8-2-20 Installing the timing tension pulley
Tightening torque for fastening bolt of crankshaft
timing pulley
185 N • m
〜
195 N • m
(2) Install the timing idle wheel assembly and tighten the
fastening bolts according to the specified torque.
Tightening torque for fastening bolt of timing idle
wheel
22 N • m
〜
26 N • m
(3) Adjust the scale mark on camshaft timing pulley to
align it with the joint (at exhaust side) between cylinder
head and camshaft bearing cap. See Fig. 8-2-19.
(4) Adjust the crankshaft timing pulley until the scale
mark on the pulley is aligned with the arrow on the oil
pump housing.
(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.
(6) Install the timing tension pulley: Embed the limit
support of timing tension pulley into the position for
mounting the bowl-shaped plug onto the cylinder head.
After the mounting pin of the timing tension pulley is
adjusted by a hexagon socket head spanner so that it is
aligned with the notch position, screw the tension pulley
bolts with specified torques. See Fig. 8-2-20.
Tightening torque for fastening bolt of timing
tension pulley
22 N • m~26 N • m
(7) Install the timing hood components 1 and 11 and the
timing hood.
——Install the timing hood components to the cylinder
body, and screw down 5 hexagon flange bolts (M10×35
and M10x50) as per the specified torque. See Fig.
8-2-21.
Tightening torque for fastening bolt of timing hood
component.
45 N • m± 3 N • m
——Embed the sealing strips I and II of timing hood
respectively into the corresponding sealing grooves.
See Fig. 8-2-21.
——After aligning the mounting holes of timing hood
components 1 and 11, tighten 10 hexagon flange bolts
(M6x16). See Fig. 8-2-21.
Tightening torque for fastening bolt of damping
Timing mark
Bone-line
Camshaft
timing pulley
Use a hexagon
socket spanner
to adjust the
mounting hole.
Analog
Notch
