SsangYong Musso. Manual - part 358

GENERAL ENGINE INFORMATION  1A3-9

SPECIAL TOOLS

SPECIAL TOOLS TABLE

000 589 10 99 01

Torque Wrench

001 589 76 21 00

Compression Pressure

Tester

001 589 73 21 00

Hand Vacuum Pump

001 589 65 09 00

Socket

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

z

The fluid level/pressure is too high.

z

The crankcase ventilation system is malfunctioning.

z

The fasteners are tightened improperly or the
threads are dirty or damaged.

z

The flanges or the sealing surface is warped.

z

There are scratches, burrs or other damage to the
sealing surface.

z

The gasket is damaged or worn.

z

There is cracking or porosity of the component.

z

An improper seal was used (where applicable).

Seals

z

The fluid level/pressure is too high.

z

The crankcase ventilation system is malfunctioning.

z

The seal bore is damaged (scratched, burred or
nicked).

z

The seal is damaged or worn.

z

Improper installation is evident.

z

There are cracks in the components.

z

The shaft surface is scratched, nicked or damaged.

z

A loose or worn bearing is causing excess seal
wear.

DIAGNOSIS

GENERAL ENGINE INFORMATION  1A3-11

28bar

Approx.18bar

Max. 3bar

COMPRESSION PRESSURE TEST

1 Test Adapter
2 Flexible Connector
3 Compression Pressure Recorder

Tools Required

000 589 65 09 00  Socket

001 589 73 21 00  Hand Vacuum Pump

Service Data

Normal Compression Pressure

Minimum Compression Pressure

Permissible Pressure Difference Between Individual Cylinders

z

Engine at normal operating temperature of 80°C

1A3-12  GENERAL ENGINE INFORMATION

Compression Pressure Measurement

Notice

Ensure that no gear is engaged and that the vehicle is
protected from rolling.

1. Run the engine to be the coolant temperature 80°C.

2. Remove the fuel injection nozzle.

Socket Wrench Insert 001 589 65 09 00

3. Install the test adapter (1) and connect the flexible

connector (2) to the compression pressure recorder.

Compression Pressure Recorder 001 589 76 21 00

4. Disconnect the vacuum line from the stop unit and

connect the hand vacuum pump to the stop unit.

5. Pump the hand vacuum pump and make the fuel injection

pump in stop position.

Operating Pressure

Approx. 500bar

Hand Vacuum Pump 001 589 73 21 00

6. Using a starter motor, crank the engine 8 revolutions.

7. Measure the remaining cylinder compression pressure

in the same manner and compare it with service data.

Notice

If out of standard, do cylinder pressure leakage test.

8. Remove the compression pressure recorder.

9. Install the fuel injection nozzle.