MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
370
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-20-16 Removing the lower cylinder
body
Fig. 5-20-17 Removing the crankshaft and the
crankshaft position signal panel
Fig. 5-20-18
装配上缸体
Fig. 5-20-18
Installing upper cylinder body
head screws (M6×12) fastening the signal panel and
remove the panel from the rear end of the crankshaft.
See Fig. 5-20-17.
Removing the cooling nozzle assembly
○
16
(1) Remove the 4 hexagon socket mushroom head
screws (M6×12) fastening the cooling nozzle and
remove the 4 cooling nozzles from the upper cylinder
body.
Attention:
When removing it, do not bump the head
of the cooling nozzle.
(2) Keep the cooling nozzle properly after removing it to
avoid pollution and bumping.
Removing the upper cylinder body
○
17
(1) Remove the thermostat cover, the thermostat and
the thermostat shield from the upper cylinder body.
(2) Remove the water drain bolt, the crankshaft position
sensor and the oil pressure alarm from the right side of
the upper cylinder body.
(3) Check the wearing condition of the wall of the
cylinder bore and replace the upper and lower cylinder
bodies if the condition is worse than that required.
Installation
Installing the upper cylinder body
○
17
(1) Install the oil return pipe assembly. After applying a
small amount of sealant to the oil return pipe installing
position, beat it into the corresponding hole on the
upper cylinder body with a hand hammer.
(2) Install the positioning sleeve to the corresponding
position on the cylinder body.
(3) Install the turbocharger oil return pipe connector to
the upper cylinder body after applying a small amount of
sealant to the connector.
(4) Install the 2 Ø18mm bowl-shaped plugs to the main
oil duct of the cylinder body after applying a small
amount of sealant to them.
The new 1608 bowl-shaped plug sealant can be
used.
(5) Install the crankshaft position sensor and the engine
oil pressure alarm to the right side of cylinder body.
(6) Installing the water drain bolt
Apply anaerobic thread lock sealant to the thread of the
water drain bolt.Install the water drain bolt into the
mounting screw hole on the cylinder body and tighten it
Lower cylinder
body
Upper cylinder
body
Crankshaft
position signal
panel
Crankshaft
Flywheel gear
ring assembly
Lower cylinder
body
Upper cylinder
body
