MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
300
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-11-5 Installing the timing system
185N·
m~195N·
m
(2) Install the camshaft timing pulley: fit the woodruff key
and the camshaft timing pulley to the exhaust camshaft,
and tighten the bolt and gasket subassembly of the
camshaft timing pulley according to specified torque. The
camshaft timing pulley should be properly fitted without
any inclination. See Fig. 5-11-5.
Tightening torque for fastening bolt subassembly of
the camshaft timing pulley
110N·
m±5N·
m
Attention:
Use the cylindrical pin to fix the camshaft
timing pulley when tightening it.
Fig. 5-11-6 Installing the camshaft timing
pulley
Fig. 5-11-7 Installing the timing tension
pulley
(3) Install and tighten the timing idle wheel assembly with
specified torque.
Tightening torque of fastening bolt of timing idle
wheel
22N·
m~26N·
m
(4) Adjust the mark position on the camshaft timing belt
pulley so as to align it with the joint (on the exhaust side)
of the cylinder head and the camshaft bearing cap. See
Fig. 5-11-6.
(5) Adjust the mark position on the crankshaft timing belt
pulley so as to align it with the arrow mark on the engine
oil pump housing.
(6) Install the timing belt. During the installation, make
sure the belts, except the tension pulley, are connected
with the pulley firmly without any looseness.
(7) Install the timing tension pulley. Embed the limit
support of the 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 socket head spanner so that its analog is
aligned with the notch position (See Fig. 5-11-7)., screw
the tension pulley bolts with specified torques.
Tightening torque of fastening bolt of timing tension
pulley
22N·
m~26N·
m
(8) Install the timing hood components I and II, the timing
hood and the timing rear hood.
——Fit the rear timing hood components to the air intake
side of the cylinder head, and screw the hexagon flange
face bolt (M6×16) with the specified torque.
Camshaft timing pulley
Timing belt
Timing mark
Bone-line
Camshaft
timing pulley
Use a hexagon
socket spanner to
adjust the mounting
hole.
Analog
Notch
