Mercedes S-class W202

1993-2000 of release

Repair and car operation



Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
- 5. Cooling system
   + 5.2. A cooling liquid
   5.3. Antifreeze for a radiator
   5.4. A temperature regulator of a cooling liquid (thermostat)
   5.5. Check of system of cooling
   5.6. Hydraulic муфта the fan
   5.7. The pump of system of liquid cooling
   5.8. A radiator
   5.9. A fan casing
   5.10. Diagnostics of malfunctions of system of cooling
   5.11. Diagnostics of malfunctions of system of indication of level of a liquid
   5.12. An engine overheat
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes







5.4. A temperature regulator of a cooling liquid (thermostat)
THE GENERAL DATA

The prevention

If the engine heats up after passage by the car of a small piece of a way it can be caused that a radiator зашлаковывается limy adjournment.


With increase in warming up of the engine the thermostat opens the big contour of circulation of a cooling liquid. If the thermostat of a cooling liquid is closed because of malfunction, the engine becomes too hot. It can be defined on indication of temperature of a cooling liquid which is in a red range while simultaneously the radiator remains cold. But the faulty thermostat even after cooling of a cooling liquid can remain and further opened. It is visible on that fact that the engine any more does not reach the working temperature, or the arrow of indication of temperature of a cooling liquid moves upwards more slowly, than before, or the capacity spent for heating in the winter decreases.

Check



PERFORMANCE ORDER
1. Remove a regulator термостатирования a cooling liquid.
2. Measure thermostat height, write down the size "and".
3. Slowly heat up the thermostat on a water bath. Thus it should not adjoin to vessel walls, and is completely shipped in water. Temperature supervise the suitable thermometer. At temperature nearby 87 With a bimetallic plate of a regulator it starts to be extended, reaching the maximum lengthening at temperature nearby 102 C. As soon as bath water will reach opening temperatures, should start to open regulating заслонка the thermostat.
4. Heat up water in a bath to its boiling. Take the thermostat, measure height (the size "b") and compare to the first measured size (the size "and"). In the end of opening the height of lifting of opening makes about 8 mm. As this temperature is not reached, check up, whether the regulator till the compared size opened, otherwise replace it.
5. In summary check up, whether the regulator completely is again closed at cooling, otherwise replace a regulator.
6. At wrong functioning replace the thermostat.
7. Establish the thermostat into place.

THE 4-CYLINDER PETROL ENGINE

1. A bolt
2. A hose of a cooling liquid
3. A hose of a cooling liquid
27. A cover of the case of a temperature regulator of a cooling liquid
27а. A temperature regulator of a cooling liquid
29. A sealing ring
30. Consolidation

Removal

PERFORMANCE ORDER
1. Disconnect a weight wire (–) from the accumulator.
The prevention

The anticreeping code of radio is thus erased.


2. Merge cooling liquid in a suitable vessel.
3. Remove a forward plastic cover.
4. Remove from a thermostat cover both hoses of a cooling liquid, preliminary unclench collars and shift them back.
5. Turn off bolts from a thermostat cover.
6. Uncover the thermostat together with the thermostat.
The prevention

It is impossible to separate the thermostat from a cover, differently it will be damaged and cannot be repeatedly established.


7. Check up the thermostat.

Installation

PERFORMANCE ORDER
1. Spread a cover together with the thermostat and a new sealing ring and screw up it with the moment 10 Н.м. In advance clear sealing surfaces on the case and a cover.
2. Spread a hose for release of air and a hose for a cooling liquid and fix their clips.
3. Fill in cooling liquid.
4. Leave to get warm the engine before fan inclusion. Check up, whether there is below a radiator warm and whether the thermostat case is tight.
5. Attach to the accumulator a weight wire. Expose time for hours. Set an anticreeping code of radio.

FEATURES OF THE 6-CYLINDER ENGINE

PERFORMANCE ORDER
1. Unscrew a cover of the thermostat and will put it aside together with the connected hose. Extend the thermostat.
2. Insert the thermostat with a new sealing ring into the case.
The prevention

At pouring of a cooling liquid from cooling system air through the ball valve on the thermostat leaves. Therefore insert the thermostat so that the ball valve was in the highest point.


3. Spread a cover and screw up it with the moment 10 Н.м.

THE DIESEL ENGINE

The diesel engine of 2,2/2,5 l

6. An air hose
17. A thermostat cover
18. A bolt of M 6 х 25
19. A sealing ring of round section
20. A regulator of a cooling liquid (thermostat)

Removal


PERFORMANCE ORDER
1. Disconnect from the storage battery a weight wire.
The prevention

The anticreeping code of radio is thus erased.


2. Merge in a pure reception vessel cooling liquid.
3. Remove an air hose, for this purpose ослабьте its collars.
4. Unscrew a thermostat cover on the pump of system of liquid cooling and lay aside with the connected hose.
5. Take the thermostat.

Installation

PERFORMANCE ORDER
1. Insert into a cover the thermostat with a new sealing ring. Thus the edge on a cover enters into gearing in a flute of a regulator of a cooling liquid.
2. Spread a cover with a regulator and hardly screw up with the moment 10 Н.м.
3. Fill in cooling liquid.
4. Leave the engine to get warm until the fan will join. Check up, whether the radiator gets warm below and whether the thermostat case is tight. Attach to the plug of the storage battery a weight wire.
5. Attach to the plug of the storage battery a weight wire.
6. Expose time for hours.
7. Enter an anticreeping code of radio.