Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
325
Fig. 5-16-5 Removing the cylinder head
assembly
Fig. 5-16-6 Removing the oil pan upper and
lower body assemblies and oil collector
assembly
Fig. 5-16-7 Removing the connecting rod
cover
Removing the engine accessories
②
Remove the wedge idle wheel. See Fig. 5-16-3.
Removing the timing system
③
(1) Remove the timing hood component I and timing
hood. See Fig. 5-16-4.
(2) Remove the timing tension pulley. See Fig. 5-16-4.
(3) Remove the timing belt.
(4) Remove the camshaft timing pulley.
Removing the cylinder head assembly
④
(1) Remove the cylinder head cover component. See
Fig. 5-16-5.
(2) Remove the camshaft bearing cap.
(3) Remove the camshaft assembly.
(4) Remove the cylinder head assembly: loosen orderly
the 10 bolts for fastening cylinder head and cylinder
body and remove the cylinder head.
Caution:
If the cylinder head bolts are not orderly
unscrewed in several times, the lower surface of the
cylinder head might be damaged.
Removing the oil pan upper and lower body
assemblies and oil collector assembly
⑤
(1) Use a spanner to remove the 14 hexagon flange
face bolts (M6×12) connecting the lower body and
upper body of oil pan in order. See Fig. 5-16-6.
(2) Use a spanner to remove the 2 hexagon flange face
bolts (M6×16) fastening the oil pipe and the 2 hexagon
flange face bolts (M8×12) fastening the oil collector
support, and remove the oil collector and gasket.
(3) Use a spanner to remove the 15 hexagon flange
face bolts (M6×20, M6×110, M8×25 and M8×45)
fastening the upper body of oil pan to the lower cylinder
body in order, and remove the upper body of oil pan
from the lower cylinder body. See Fig. 5-16-6.
Cylinder
head cover
Camshaft
bearing cap
Cylinder head
Upper body
of oil pan
Oil collector
Lower body
of oil pan
Lower
connecting rod
bearing shell
Connecting rod cover
Connecting rod bolt
