S-class W202 Mercedes

1993-2000 of release

Repair and car operation

W202 Mercedes
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Greasing system
- 5. Cooling system
   + 5.2. Cooling liquid
   5.3. Antifreeze for a radiator
   5.4. A temperature regulator cooling liquids (thermostat)
   5.5. Check of system of cooling
   5.6. Hydraulic coupling of the fan
   5.7. Pump of system of liquid cooling
   5.8. Radiator
   5.9. Fan casing
   5.10. Diagnostics of malfunctions of system of cooling
   5.11. Diagnostics of malfunctions of system of indication of level of liquid
   5.12. Engine overheat
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes

5.10. Diagnostics of malfunctions of system of cooling

GENERAL INFORMATION

REASON	WAY OF ELIMINATION
Too high temperature of cooling liquid, indication is in red area of a scale
Too little cooling liquid in a circulation contour	The compensatory tank should be filled in to a mark, see subsection 5.2., check tightness of system of cooling.
The regulator of supply of cooling liquid (thermostat) is not open	Check, whether the top hose with cooling liquid on a radiator heats up. If is not present, remove and check a regulator, if necessary, replace.
The pump of system of liquid cooling is faulty	Disassemble and check the pump.
The sensor of indication of temperature of cooling liquid is faulty	In addition check the sensor.
The system of indication of temperature of cooling liquid is faulty	Check the display device.
The carving cover of a radiator is faulty	Check cooling system, carry out hydraulic test of a carving cover.
Radiator plastnka are polluted	Remove a radiator and blow it the compressed air from the engine.
Radiator inside зашлакован limy deposits and corrosion products. The radiator heats up only in the top part, the bottom hose of a radiator with cooling liquid does not heat up	Replace a radiator.
The fan of a radiator rotates not according to increase in frequency of rotation of a shaft of the engine, the bimetallic plate of the hydraulic coupling of the fan of system of cooling is faulty	At temperature of cooling liquid about 90-95 ° With leave to work the engine with frequency of rotation of a shaft of the engine of 4000-4500 rpm., thus frequency of rotation of a shaft of the fan should increase accurately. Otherwise check the hydraulic coupling of the fan of system of cooling, if necessary replace a bimetallic platinka.