SsangYong Musso. Service manual — part 323
1F1-50 M162 ENGINE CONTROLS
1 Vacuum Hose
2 Fuel Return Line . . . . . . . . ... 25-30Nm
3 Fuel Supply Line . . . . . . . . ... 25-30Nm
4 Injector Connector
FUEL DISTRIBUTOR
Preceding Work : Removal of intake air duct
5 Bolt (M8 X 50) . . . . . . . . 22.5-27.5 Nm
6 Fuel Distributor
7 O-ring . . . . . . . . .. Replace if damaged
8 Injector
M162 ENGINE CONTROLS 1F1-51
Removal & Installation Procedure
1. Discharge the fuel pressure from the fuel pressure test
connector.
2. Disconnect the battery ground cable.
3. Disconnect the vacuum hose from the fuel pressure
regulator.
4. Remove the cable guide.
5. Remove the fuel return and supply line.
Notice
z
For removal, cover around parts with cloths not to be
stained by fuel.
z
In case of checking the injector only, do not remove the
fuel return and supply line.
Installation Notice
6. Remove the six injector connectors.
7. Remove the two left and two right bolts and one center bolt
of the fuel distributor assembly from the intake manifold.
Installation Notice
Tightening Torque
25 - 30 Nm
Tightening Torque
22.5 - 27.5 Nm
1F1-52 M162 ENGINE CONTROLS
8. Remove the injectors and the fuel distributor carefully.
9. Installation should follow the removal procedure in the
reverse order.
10. Check for fuel pressure and internal leakage by operating
the engine.
Fuel Pressure Test
1. Turn the ignition switch to "OFF" position.
2. Remove the fuel pressure test connector.
Vacuum Hose Connected (bar)
3.2 - 3.6
Vacuum Hose Disconnected (bar) 3.7 - 4.2
5. Replace the pressure regulator diaphragm if out of the
specification.
3. Connect the fuel pressure gauge to the fuel pressure test
connector.
4. Test the fuel pressure at idling by operating the engine.
M162 ENGINE CONTROLS 1F1-53
3. If there is no change in fuel pressure and maintain the
following pressure over 30 minutes, it is normal.
Internal Leakage Test
1. Connect the fuel pressure gauge to the fuel pressure test
connector.
2. Stop the engine for approx. 30 minutes and then check the
fuel pressure changes.
Fuel pressure
drops slowly
•
Fuel leakage at the
injector
•
Faulty fuel pressure
regulator's
diaphragm and O-
ring.
Fuel pressure
drops rapidly
•
Faulty check valve
in the fuel pump.
Possible Cause
Pressure Change
Fuel Pressure(bar)
2.5
Discharging the pressure in fuel system
1. Remove the fuel pressure test connector.
Installation Notice
2. Remove the fuel pressure in fuel system by pressing the
service valve with a clean, pointy tool.
Notice
Place a cloth so that the fuel doesn't stain around.
Tightening Torque
22.5 - 27.5 Nm
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