1997 SSANGYONG KORANDO fuel pressure

M161 ENGINE CONTROLS 1F2 -- 55
D AEW OO M Y_2000
The pressure difference between the fuel pressure and
the intake manifold is about 3.8 bars during the full load.
YAA1F500
1. Fuel Pressure Regulator
2. Intake Manifold
3. Fuel Return (to fuel tank)
4. Fuel Supply (from fuel pump)
5. Fuel Pressure (approx. 3.8 bars)
6. Intake Manifold Negative Pressure (0 bar)

The spring chamber (9) is connected to the intake man-
ifold with the vacuum hose at the intake pipe connection
(7). The negative pressure generated in the intake man-
ifold activates the diaphragm, and thus the fuel pressure
gets reduced to the rate of the operating extent of the
diaphragm by the intake manifold’s negative pressure.
YAA1F510
Consequently, the fuel pressure in the fuel distributor
changes by the intake manifold’s negative pressure, and
the injector ’s fuel pressure gets reduced independentlyto the throttle valve’s position. Thus, the fuel injection
volume can only be determined according to the injec-
tor’s injecting duration.
The pressure difference between the fuel pressure and
the intake manifold is approx. 3.2 bars during idling.
YAA1F520
1. Fuel Pressure Regulator
2. Intake Manifold
3. Fuel Return (to fuel tank)
4. Fuel Supply (from fuel pump)
7. Fuel Pressure (approx. 3.2 bars)
8. Intake Manifold Negative Pressure (0.6 bars)

YAA1F530
A. Fuel pressure
B. Intake Manifold Negative Pressure
LL. Idling
TL. Partial load
VL. Full load

M161 ENGINE CONTROLS 1F2 -- 95
D AEW OO M Y_2000
MAINTENANCE AND REPAIR
YAA1F700
ON VEHICLE SERVICE
DISCHARGING THE PRESSURE IN
FUEL SYSTEM
Removal and Installation Procedure
1. Remove the fuel pressure test connector.
Installation Notice
Tightening Torque
25 NSm (18 lb-ft)
YAA1F710
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.
3. Installation should follow the removal procedure in
the reverse order.
YAA1F170
FUEL PUMP
Tools Required
661 589 00 46 00 Fuel Tank Cap Wrench
Removal and Installation Procedure
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
1. Relieve the fuel system pressure. Refer to “Discharg-
ing the Pressure in Fuel System” in this section.
2. Disconnect the negative battery cable.
3. Put aside the floor carpet to remove the fuel pump ac-
cess cover.
4. Remove the fuel pump access cover.
5. Remove the fuel pump wiring connectors.
6. Disconnect the fuel supply and return pipes.
7. Remove the fuel pump locking cap band.

1F2 -- 96 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F550
8. Using the fuel tank cap wrench 661 589 00 46 00,
remove the locking cap.
9. Remove the pump from the fuel tank.
Notice:Check the condition of the seal and replace if
necessary. Drain the fuel before removing the pump.
10. Perform an operational check of the fuel pump.
11. Installation should follow the removal procedure in
the reverse order.
YAA1F190
FUEL FILTER
Removal and Installation Procedure
1. Disconnect the negative battery cable.
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
2. Relieve the fuel system pressure. Refer to “Dis-
charging the Pressure in Fuel System” in this sec-
tion.
3. Disconnect the fuel lines from the fuel filter.
Installation Notice
Tightening Torque
28 NSm (21 lb-ft)
4. Remove the fuel filter mounting bracket bolt .
Installation Notice
Tightening Torque
6NSm (53 lb-in)
Notice:Place the fuel pump pad. There may be a corro-
sion due to the contact between the fuel filter and the
bracket.
5. Remove the fuel filter.
6. Install the fuel filter.
7. Perform a leak test of the fuel filter.
8. Installation should follow the removal procedure in
the reverse order.

M161 ENGINE CONTROLS 1F2 -- 97
D AEW OO M Y_2000
KAA1F370
FUEL TANK
Removal and Installation Procedure
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
1. Relieve the fuel pressure. Refer to “Discharging the
Pressure in Fuel System” in this section.
2. Disconnect the negative battery cable.
3. Drain the fuel tank.
4. Put aside the floor carpet to remove the fuel pump
access cover.
5. Remove the fuel pump access cover.
YAA1F170
6. Disconnect the return line.
7. Disconnect the supply line.
8. Disconnect the fuel tank-to-canister hose from the
fuel tank.
9. Disconnect the fuel pump wiring connector.
KAB1F370
10. Disconnect the fuel filler hose and air vent hose from
the fuel tank.
11. Support the fuel tank.
12. Remove the fuel tank retaining nuts.
Installation Notice
Tightening Torque
38 NSm (28 lb-ft)
13. Carefully lower the fuel tank.

1F2 -- 98 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F180
14. Turn the roll over valves counterclockwise at an
angle of 90 degrees.
15. Turn the lock ring counterclockwise.
16. Remove and discard the gasket.
17. Installation should follow the removal procedure in
the reverse order.
YAA1F700
FUEL PRESSURE REGULATOR
Removal and Installation Procedure
1. Disconnect the negative battery cable.
2. Remove the fuel pressure test connector.
Installation Notice
Tightening Torque
25 NSm (18 Ib-ft)
YAA1F720
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
3. Relieve the fuel pressure in fuel supply system by
pressing the service valve.
YAA1F730
4. Disconnect the vacuum hose.
5. Disconnect the circlip and remove the fuel pressure
regulator.
6. Apply the oil to O-ring lightly and then replace it.
7. Perform a leak test of the fuel pressure regulator
with the engine off and the ignition on.
8. Installation should follow the removal procedure in
the reverse order.

M161 ENGINE CONTROLS 1F2 -- 99
D AEW OO M Y_2000
YAA1F710
FUEL RAIL AND INJECTORS
Removal and Installation Procedure
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
1. Discharge the fuel pressure from the fuel pressure
test connector.
2. Disconnect the negative battery cable.
3. Disconnect the vacuum hose from the fuel pressure
regulator.
YAA1F740
4. Remove the cable guide.
5. Disconnect the Hot Film Air Mass (HFM) sensor
connector.
6. Remove the intake air duct mounting bolts.
Installation Notice
Tightening Torque
9NSm (80 Ib-in)
7. Remove the intake air duct clamps.
8. Remove the intake air duct.
YAA1F750
9. Remove the fuel return and supply line.
Notice:For removal, cover around parts with cloths not
to be stained by fuel. In case of checking the injector
only, do not remove the fuel return and supply line.
Installation Notice
Tightening Torque
23 NSm (17 Ib-ft)
10. Remove the six injector connectors.
YAA1F760
11. Remove the two left and two right bolts and one cen-
ter bolt of the fuel rail assembly from the intake man-
ifold.
Installation Notice
Tightening Torque
25 NSm (18 Ib-ft)

1F2 -- 100 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F770
Notice:Before removal, the fuel rail assembly may be
cleaned with a spray-type cleaner, following package in-
structions. Do not immerse the fuel rails in liquid clean-
ing solvent. Use care in removing the fuel rail assembly
to prevent damage to the electrical connectors and in-
jector spray tips. Prevent dirt and other contaminants
from entering open lines and passages. Fittings should
be capped and holes plugged during service.
Important:If an injector becomes separated from the
rail and remains in the cylinder head, replace the injector
O-ring seals and the retaining clip.
12. Remove the injectors and the fuel rail carefully.
13. Remove the fuel injector retainer clips.
14. Remove the fuel injectors by pulling them down and
out.
15. Discard the fuel injector O-rings.
16. Lubricate the new fuel injector O-rings with engine
oil. Install the new O-rings on the fuel injectors.
17. Perform a leak check of the fuel rail and fuel injec-
tors.
18. Installation should follow the removal procedure in
the reverse order.
YAA1F780
ENGINE COOLANT TEMPERATURE
SENSOR
Removal and Installation Procedure
1. Relieve the coolant system pressure.
2. Disconnect the negative battery cable.
3. Disconnect the engine coolant temperature sensor
connector.
Notice:Take care when handling the engine coolant
temperature sensor. Damage to the sensor will affect
the proper operation of the fuel injection system.
4. Remove the engine coolant temperature sensor
from the pump hosing.
Installation Notice
Tightening Torque
30 NSm (22 Ib-ft)
5. Installation should follow the removal procedure in
the reverse order.

D AEW OO M Y_2000
SECTION 1
ENGINE
SECTION 1A3 (OM600 ENGINE)
GENERAL ENGINE INFORMATION
TABLE OF CONTENTS
Specifications 1A3 -- 1............................
Engine Specifications 1A3-- 1.....................
Sectional View 1A3 -- 3............................
OM662LA Engine 1A3-- 3........................
OM661LA Engine 1A3-- 5........................
Performance Curve 1A3-- 7........................
OM662LA Engine 1A3-- 7........................
OM661LA Engine 1A3-- 8........................
Special Tools 1A3 -- 9.............................Special Tools Table 1A3-- 9.......................
Diagnosis 1A3 -- 10................................
Oil Leak Diagnosis 1A3-- 10.......................
Compression Pressure Test 1A3-- 11..............
Cylinder Pressure Leakage Test 1A3-- 13...........
General Information 1A3 -- 15......................
Cleanliness and Care 1A3 -- 15....................
On-- Engine Service 1A3-- 15......................
SPECIFICATIONS
ENGINE SPECIFICATIONS
ApplicationOM662LAOM661LA
Engine TypeFour -- Stroke DieselFour -- Stroke Diesel
Displacement (CC)28742299
Cylinder (Bore x Stroke)(mm)89 x 92.489 x 92.4
Fuel Injection / Ignition SystemPES 5 M55 C320 RS 168PES 5 M55 C320 RS 167
Compression Ratio22 :122 :1
Number of Cylinders54
Camshaft Valve ArrangementSOHCSOHC
Camshaft Drive TypeChain -- DriveChain-- Drive
Max. Output (ps/rpm)120 / 4000101 / 4000
Max. Torque (kgSm/rpm)25.5 / 400021.5 / 2400
Firing Order1--2--4--5--31--3--4--2
Injection TimingBTDC 18_±10_BTDC 18_±10_
Valve Timing
(t2lift)
IntakeOpen/CloseAT DC 11 . 3 3_/ ABDC 17_AT DC 11 . 3 3_/ ABDC 17_g
(at 2mm lift)ExhaustOpen/CloseBBDC 28_/ BTDC 15.25_BBDC 28_/ BTDC 15.25_
Valve Clearance AdjustmentAutomatic ControlAutomatic Control