SsangYong Rexton. Manual - part 15

DI01-14

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

ENGINE ASSEMBLY

DI ENG SM - 2004.4

Probable Cause

•

Inadequate valve clearance

•

Abrasion of valve stem or guide.

•

Weak valve spring.

•

Abrasion of the piston, the ring
or the cylinder.

•

Abrasion of the connecting rod
bearing.

•

Loosened the connecting rod
nut.

•

Abrasion of the crankshaft
bearing.

•

Abrasion of the crankshaft
journal.

•

Loosened bearing cap bolt.

•

Excessive clearance of the
crankshaft thrust bearing.

•

Low oil pressure.

Correction

•

Adjust the valve clearance.

•

Replace the valve stem or the
guide.

•

Replace the spring.

•

Boring the cylinder or replace
the piston, the ring or the
cylinder.

•

Replace the bearing.

•

Tighten to the specified torque

•

Replace the bearing.

•

Grind or replace the crankshaft
journal.

•

Tighten to the specified torque.

•

Adjust or replace.

•

Refer to “Low Oil Pressure” in
this section.

Condition

GENERAL DIAGNOSIS (Cont’d)

Valve Noise

Engine Noise

Piston, Ring,
Cylinder Noise

Connecting Rod
Noise

Crankshaft
Noise

DI01-15

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

ENGINE ASSEMBLY

DI ENG SM - 2004.4

OIL LEAK DIAGNOSIS

Most fluid oil leaks are easily located and repaired by vi-
sually finding the leak and replacing or repairing the nec-
essary parts. On some occasions a fluid leak may be dif-
ficult 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.

DIAGNOSTIC INFORMATION AND PROCEDURE

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 deter-
mined in 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 fol-
lowing conditions and correct them as they may cause a
leak.

Gaskets

• The fluid level/pressure is too high.

• The crankcase ventilation system is malfunctioning.

• The fasteners are tightened improperly or the threads

are dirty or damaged.

• The flanges or the sealing surface is warped.

• There are scratches, burrs or other damage to the

sealing surface.

• The gasket is damaged or worn.

• There is cracking or porosity of the component.

• An improper seal was used (where applicable).

Seals

• The fluid level/pressure is too high.

• The crankcase ventilation system is malfunctioning.

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

• The seal is damaged or worn.

• Improper installation is evident.

• There are cracks in the components.

• The shaft surface is scratched, nicked or damaged.

• A loose or worn bearing is causing excess seal wear.

DI01-16

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

ENGINE ASSEMBLY

DI ENG SM - 2004.4

Notice

• Before cranking the engine, make sure that the test wiring, tools and persons are keeping away from moving

components of engine (e.g., belt and cooling fan).

• Park the vehicle on the level ground and apply the parking brake.

• Do not allow anybody to be in front of the vehicle.

Specifications

Y220_01005

COMPRESSION PRESSURE TEST

The compression pressure test is to check the conditions of internal components (piston, piston ring, intake and
exhaust vale, cylinder head gasket). This test provides current engine operating status.

Compression ratio

Test temperature

Compression  pressure

 Normal value

 Minimum value

Permissible pressure difference between individual cylinders

18 : 1

at normal operating temperature (80°C)

32 bar

18 bar

Max. 3 bar

DI01-17

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

ENGINE ASSEMBLY

DI ENG SM - 2004.4

1. Warm the engine up to normal operating temperature

(80°C).

2. Disconnect the fuel rail pressure sensor connector to

cut off the fuel injection.

3. Place the diagram sheet to compression pressure tester.

Notice

•

Disconnect the fuel rail pressure sensor connector to cut off the fuel injection.

•

Discharge the combustion residues in the cylinders before testing the compression pressure.

•

Apply the parking brake before cranking the engine.

Measuring Procedure

Y220_01006

Y220_01007

Y220_01008

4. Remove the glow plugs and install the compression

pressure tester into the plug hole.

5. Crank the engine for approx. 10 seconds by using the

start motor.

6. Record the test result and measure the compression

pressure of other cylinders with same manner.

7. If the measured value is not within the specifications,

perform the cylinder pressure leakage test.

Tightening torque (Tester)

15 Nm