1998 SSANGYONG MUSSO oil

1A2-8 GENERAL ENGINE INFORMATION
OIL LEAK DIAGNOSIS
Most fluid oil leaks are easily located and repaired by
visually finding the leak and replacing or repairing the
necessary parts. On some occasions a fluid leak may
be difficult to locate or repair. The following procedures
may help you in locating and repairing most leaks.
Finding the Leak
1. Identify the fluid. Determine whether it is engine oil,
automatic transmission fluid, power steering fluid, etc.
2. Identify where the fluid is leaking from.
2.1 After running the vehicle at normal operating
temperature, park the vehicle over a large sheet
of paper.
2.2 Wait a few minutes.
2.3 You should be able to find the approximate
location of the leak by the drippings on the
paper.
3. Visually check around the suspected component.
Check around all the gasket mating surfaces for
leaks. A mirror is useful for finding leaks in areas that
are hard to reach.
4. If the leak still cannot be found, it may be necessary
to clean the suspected area with a degreaser, steam
or spray solvent.
4.1 Clean the area well.
4.2 Dry the area.
4.3 Operate the vehicle for several miles at normal
operating temperature and varying speeds.
4.4 After operating the vehicle, visually check the
suspected component.
4.5 If you still cannot locate the leak, try using the
powder or black light and dye method.
Powder Method
1. Clean the suspected area.
2. Apply an aerosol-type powder (such as foot powder)
to the suspected area.
3. Operate the vehicle under normal operating
conditoins.
4. Visually inspect the suspected component. You
should be able to trace the leak path over the white
powder surface to the source.
Black Light and Dye Method
A dye and light kit is available for finding leaks, Refer to
the manufacturer's directions when using the kit.
1. Pour the specified amount of dye into the engine oil
fill tube.
2. Operate the vehicle normal operating conditions as
directed in the kit.
3. Direct the light toward the suspected area. The dyed
fluid will appear as a yellow path leading to the
source.
Repairing the Leak
Once the origin of the leak has been pinpointed and
traced back to its source, the cause of the leak must be
determined n order for it to be repaired properly. If a
gasket is replaced, but the sealing flange is bent, the
new gasket will not repair the leak. The bent flange must
be repaired also. Before attempting to repair a leak,
check for the following conditions and correct them as
they may cause a leak.
Gaskets
lThe fluid level/pressure is too high.
lThe crankcase ventilation system is malfunctioning.
lThe fasteners are tightened improperly or the threads
are dirty or damaged.
lThe flanges or the sealing surface is warped.
lThere are scratches, burrs or other damage to the
sealing surface.
lThe gasket is damaged or worn.
lThere is cracking or porosity of the component.
lAn improper seal was used (where applicable).
Seals
lThe fluid level/pressure is too high.
lThe crankcase ventilation system is malfunctioning.
lThe seal bore is damaged (scratched, burred or
nicked).
lThe seal is damaged or worn.
lImproper installation is evident.
lThere are cracks in the components.
lThe shaft surface is scratched, nicked or damaged.
lA loose or worn bearing is causing excess seal wear.
DIAGNOSIS

1A2-12 GENERAL ENGINE INFORMATION
CYLINDER PRESSURE LEAKAGE TEST
3 Engine Oil Filler Cap
5 Vibration Damper
Permissible Pressure Leakage
6 Cylinder Pressure Leakage Tester with
Connecting Hose
Universal Tool
At Whole Engine
At Valve and Cylinder Head Gasket
At Piston and Piston RingMax. 25 %
Max. 10 %
Max. 20 %
Cylinder Number By Mark On Vibration Damper At TDC
TDC Mark
Cylinder NumberUT (BDC : 180°)
2, 3OT (TDC)
1, 4
Cylinder Pressure Leakage Tester Bosch EF AW 210A
Sun, CLT 228

GENERAL ENGINE INFORMATION 1A2-13
Leakage Test
1. Warm the engine up to normal operating temperature.
2. Disconnect the negative battery cable.
3. Remove the spark plugs.
4. Check the coolant level by opening the coolant surge tank
cap and replenish if insufficient.
5. Open the engine oil filler cap.
6. Connect the tester to air pressure line and adjust the scale
of tester.
7. Install the connecting hose to spark plug hole.
9. Connect the connecting hose to tester and measure the
leakage volume after blowing up 5bar of compressed air.
Notice
Measure the leakage volume in the completely opening
condition of throttle valve by pulling the acceleration cable.
10. Perform the pressure test according to the firing order.
Notice
Firing Order : 1 - 3 - 4 - 2
11. Compare the leakage pressure with the specifications.8. Position the piston of No.1 cylinder at TDC by rotating the
crankshaft.

1A2-14 GENERAL ENGINE INFORMATION
GENERAL INFORMATION
CLEANLINESS AND CARE
An automobile engine is a combination of many
machined, honed, polished and lapped surfaces with
tolerances that are measured in the ten-thousanths of
an inch. When any internal engine parts are serviced,
care and cleanliness are important. A liberal coating of
enigne oil should be applied to friction areas during
assembly, to protect and lubricate the surfaces on initial
operation. Proper cleaning and protection of machined
surfaces and friction areas is part of the repair
procedure. This is considered standard shop practice
even if not specifically stated.
Whenever valve train components are removed for
service, they should be kept in order. They should be
installed in the same locations, and with the same mating
surfaces, as when they were removed.
Battery cables should be disconnected before any major
work is performed on the engine. Failure to disconnect
cables may result in damage to wire harness or other
electrical parts.
ON-ENGINE SERVICE
Caution: Disconnect the negative battery cable be-
fore removing or installing any electrical unit, or
when a tool or equipment could easily come in con-
tact with exposed electrical terminals. Disconnect-
ing this cable will help prevent personal injury and
damage to the vehicle. The ignition must also be in
LOCK unless otherwise noted.
Notice: Any time the air cleaner is removed, the intake
opening should be covered. This will protect against
accidental entrance of foreign material, which could
follow the intake passage into the cylinder and cause
extensive damage when the engine is started.

Application
Engine Type
Displacement (CC)
Cylinder (Bore x Stroke) (mm)
Fuel Injection / Ignition System
Compression Ratio
Number of Cylinders
Camshaft Valve Arrangement
Camshaft Drive Type
Max. Output (ps/rpm)
Max. Torque (kg•m/rpm)
Firing Order
Injection Timing
Valve Timing Intake Open/Close
(at 2mm lift) ExhaustOpen/Close
Valve Clearance Adjustment
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
SPECIFICATIONS
ENGINE SPECIFICATIONS
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
OM662LA
Four-Stroke Diesel
2874
89 x 92.4
PES 5 M55 C320 RS 168
22:1
5
SOHC
Chain-Drive
120 / 4000
25.5 / 4000
1-2-4-5-3
BTDC 18°± 10°
ATDC 11.33° / ABDC 17°
BBDC 28° / BTDC 15.25°
Automatic ControlOM661LA
Four-Stroke Diesel
2299
89 x 92.4
PES 5 M55 C320 RS 167
22:1
4
SOHC
Chain-Drive
101 / 4000
21.5 / 2400
1-3-4-2
BTDC 18°± 10°
ATDC 11.33° / ABDC 17°
BBDC 28° / BTDC 15.25°
Automatic Control

1A3-2 GENERAL ENGINE INFORMATION
OM 662 LA
720 - 820
135 - 143
8.0 - 9.5
Forced by Gear Pump
Combined Full-Flow and Partial Flow
Filter
Diesel Application
Idle Speed (rpm)
Fuel Injection Pressure (bar)
Oil Capacity (liter)
Lubrication Type
Oil Filter Type
Fuel
ENGINE SPECIFICATIONS (Cont'd)
OM661LA
750 - 850
135 - 143
6.5 - 8.0
Forced by Gear Pump
Combined Full-Flow and Partial Flow
Filter
Diesel

1A3-10 GENERAL ENGINE INFORMATION
OIL LEAK DIAGNOSIS
Most fluid oil leaks are easily located and repaired by
visually finding the leak and replacing or repairing the
necessary parts. On some occasions a fluid leak may
be difficult to locate or repair. The following
procedures may help you in locating and repairing
most leaks.
Finding the Leak
1. Identify the fluid. Determine whether it is engine
oil, automatic transmission fluid, power steering
fluid, etc.
2. Identify where the fluid is leaking from.
2.1 After running the vehicle at normal operating
temperature, park the vehicle over a large
sheet of paper.
2.2 Wait a few minutes.
2.3 You should be able to find the approximate
location of the leak by the drippings on the
paper.
3. Visually check around the suspected component.
Check around all the gasket mating surfaces for
leaks. A mirror is useful for finding leaks in areas
that are hard to reach.
4. If the leak still cannot be found, it may be
necessary to clean the suspected area with a
degreaser, steam or spray solvent.
4.1 Clean the area well.
4.2 Dry the area.
4.3 Operate the vehicle for several miles at
normal operating temperature and varying
speeds.
4.4 After operating the vehicle, visually check the
suspected component.
4.5 If you still cannot locate the leak, try using the
powder or black light and dye method.
Powder Method
1. Clean the suspected area.
2. Apply an aerosol-type powder (such as foot
powder) to the suspected area.
3. Operate the vehicle under normal operating
conditions.
4. Visually inspect the suspected component. You
should be able to trace the leak path over the white
powder surface to the source.
Black Light and Dye Method
A dye and light kit is available for finding leaks, Refer
to the manufacturer's directions when using the kit.1. Pour the specified amount of dye into the engine
oil fill tube.
2. Operate the vehicle normal operating conditions
as directed in the kit.
3. Direct the light toward the suspected area. The
dyed fluid will appear as a yellow path leading to
the source.
Repairing the Leak
Once the origin of the leak has been pinpointed and
traced back to its source, the cause of the leak must
be determined n order for it to be repaired properly. If
a gasket is replaced, but the sealing flange is bent,
the new gasket will not repair the leak. The bent flange
must be repaired also. Before attempting to repair a
leak, check for the following conditions and correct
them as they may cause a leak.
Gaskets
lThe fluid level/pressure is too high.
lThe crankcase ventilation system is malfunctioning.
lThe fasteners are tightened improperly or the
threads are dirty or damaged.
lThe flanges or the sealing surface is warped.
lThere are scratches, burrs or other damage to the
sealing surface.
lThe gasket is damaged or worn.
lThere is cracking or porosity of the component.
lAn improper seal was used (where applicable).
Seals
lThe fluid level/pressure is too high.
lThe crankcase ventilation system is malfunctioning.
lThe seal bore is damaged (scratched, burred or
nicked).
lThe seal is damaged or worn.
lImproper installation is evident.
lThere are cracks in the components.
lThe shaft surface is scratched, nicked or damaged.
lA loose or worn bearing is causing excess seal
wear.
DIAGNOSIS

1A3-14 GENERAL ENGINE INFORMATION
Leakage Test
1. Run the engine to be the coolant temperature 80°C.
2. Remove the fuel injection nozzle.
3. Open the coolant subtank cap.
4. Check the coolant level and replenish if necessary.
5. Open the oil filler cap.
6. Remove the air cleaner cover and element.
7. Position the piston at TDC.
8. Install the connector (1) and connection piece (2).
9. Calibrate the tester and connect the connection hose
(3)
10. Pressurize with compressed air and compare the
pressure changes with permissible pressure leakage.
11. If permissible pressure leakage is out of standard, check
followings :
- Intake and exhaust lines.
- Sounds in oil filler area.
- Air bubbles in radiator coolant.
12. Do pressure leakage test for the remaining cylinders
according to the firing order.
lOM 662LA Engine : 1-2-4-5-3
lOM 661LA Engine : 1-3-4-2
13. Remove the tester.
14. Close the coolant pressure cap and oil filler cap.
15. Install the air cleaner element and cover.
16. Install the fuel injection nozzle.