Mercedes W124

since 1985-1995 of release

Repair and car operation



W124 Mercedes
+ Governing bodies and control devices
+ MAINTENANCE
+ 2. Maintenance (diesel engines)
+ ENGINE
+ 4. Repair of 6-cylinder petrol SOHC engines
+ 5. Repair of 6-cylinder petrol DOHC engines
+ 6. Repair of the diesel engine established in the car
+ 7. Major maintenance of engines
- COOLING SYSTEM
   8.2. General information
   8.3. Hoses of system of cooling
   8.4. Radiator
   8.5. Thermostat
   + 8.6. Radiator fan
   8.7. Electric sensors
   + 8.8. Water pump
   8.9. Heating and ventilation system
   + 8.10. Elements of system of heating
   8.11. Air central air
+ FUEL SYSTEM
+ 10. System of injection of BOSCH CIS-E fuel (KE-JETRONIC)
+ 11. System of injection of BOSCH HFM fuel
+ 12. Fuel system of diesel engines
+ 13. Fuel system of diesel engines
+ SYSTEMS OF START, IGNITION
+ 15. System of ignition of 4-cylinder petrol engines
+ 16. System of ignition of four-cylinder petrol engines
+ PRESTARTING HEATING
+ TRANSMISSION
+ 19. Mechanical transmission
+ 20. Automatic transmission
+ POWER SHAFTS
+ BRAKE SYSTEM
+ SUSPENSION BRACKET
+ BODY
+ ELECTRIC EQUIPMENT
+ CHECK OF MALFUNCTIONS






COOLING SYSTEM

8. Systems of cooling, heating and ventilation

8.1. Technical characteristics

System type

Models with 4-cylinder petrol engines

Tight with a cross-section or descending stream a radiator; the radiator fan with a drive from an auxiliary driving belt and the electromagnetic coupling; the centrifugal water pump with a drive from an auxiliary driving belt; the thermostat and separately established broad tank
Models with 6-cylinder petrol engines
Tight with a cross-section or descending stream a radiator; the radiator fan with a drive an auxiliary driving belt and the termovyazkostny coupling, the centrifugal water pump with a drive вспомо a gatelny driving belt; the thermostat and separately located broad tank
Diesel engines
Tight with a cross-section or descending stream a radiator; the radiator fan with a drive from an auxiliary driving belt and the termovyazkostny or electromagnetic coupling; the centrifugal water pump put in action by an auxiliary driving belt; the thermostat and separately located broad tank
Pressure of opening of the perepuskny valve:
– models till 1987
1,2 bar
– models since 1987
1,4 bar
The maximum temperature of cooling liquid:
– models till 1987
125 ° With
– models since 1987
129 ° With
Temperature-sensitive element of the electromagnetic coupling of the fan of a radiator
Inclusion temperature
102 ° With
Switching off temperature
98 ° With

Thermostat

Petrol engines:
– temperature of the beginning of opening
87 ± 2 ° With
– temperature of complete opening
102 ° With
Diesel engines without a turbo-supercharging:
– temperature of the beginning of opening
85 ± 2 ° With
– temperature of complete opening
94 ° With
Diesel engines with a turbo-supercharging:
– temperature of the beginning of opening
80 ± 2 ° With
– temperature of complete opening
100 ° With

Cooling liquid

Type
Mix of the distilled water and antifreeze
Ratio of components:
– protection to temperature – 37 ° With
50 % of water and 50 % of antifreeze
– protection to temperature – 45 ° With
45 % of water and 55 % of antifreeze
Amount of cooling liquid:
– 4-cylinder petrol engines:
   • with an automatic heating system
8,5 l
   • with the conditioner
9,5 l
– 6-cylinder petrol SOHC engines:
   • with an automatic heating system
9,0 l
   • with the conditioner
9,5 l
– 6-cylinder DOHC engines
9,0 l
– 4-cylinder diesel engines:
   • with an automatic heating system
8,5 l
   • with the conditioner
9,0 l
– 5-cylinder diesel engines without a turbo-supercharging:
   • with an automatic heating system
9,0 l
   • with the conditioner
9,5 l
– 5-cylinder diesel engines with a turbo-supercharging
9,0 l
– 6-cylinder diesel engines without a turbo-supercharging:
   • with an automatic heating system
9,0 l
   • with the conditioner
9,5 l
– 6-cylinder diesel engines with a turbo-supercharging
10,0 l

Tightening moments

The water pump to a cover:
– 4-cylinder petrol engines
10 Nanometers
– 6-cylinder petrol engines
23 Nanometers
– diesel engines
10 Nanometers
Pulley of the water pump:
– 4-cylinder engines
15 Nanometers
– 6-cylinder SOHC engines
10 Nanometers
– 6-cylinder DOHC engines
15 Nanometers
– diesel engines
15 Nanometers
The radiator fan to the electromagnetic or termovyazkostny coupling:
– 4-cylinder engines
27 Nanometers
– 6-cylinder SOHC engines
10 Nanometers
– 6-cylinder DOHC engines
10 Nanometers
– 4-cylinder diesel engines
25 Nanometers
– 5-and 6-cylinder diesel engines
10 Nanometers
The Termovyazkostny coupling of the fan of a radiator to the water pump
45 Nanometers
The electromagnetic coupling to the water pump
6 Nanometers
Stopper plum of cooling liquid from a radiator
2 Nanometers
Cover of a casing of the thermostat:
– 4-cylinder petrol engines:
   • with a metal casing of the thermostat
10 Nanometers
   • with a plastic casing of the thermostat
8 Nanometers
– 6-cylinder petrol engines
6 Nanometers
– diesel engines
10 Nanometers
Thermostat casing to a head of the block of cylinders on 4-cylinder petrol engines
20 Nanometers