Engine cooling system М110/М123 Mercedes E-Class (W123)

Cooling system — general information
Note: Tightening torques for threaded connections, kgf·m: - radiator drain plug: 0.15-0.20; - water pump: 0.9; - fan with electromagnetic clutch: 2.0-2.4. The fan drive...

Draining the cooling system
Warning! It is recommended to drain the coolant from a cooled engine. If this is not possible, place a piece of thick cloth on the filler cap of the radiator or...

Flushing the cooling system
Over time, the radiator and engine water passages become narrowed or even completely clogged with scale or deposits, which reduces the efficiency of the cooling system....

Filling the cooling system
1. Replace the radiator and thermostat and connect all hoses. 2. Install and tighten the radiator and cylinder block drain plugs. 3. With the heater in the hot air...

Removal, inspection, cleaning and installation of the radiator
1. Drain the cooling system, but if you are not planning to completely replace it, do not drain it from the cylinder block. 2. Remove the two brackets and the fan shroud...

Removal, checking and installation the thermostat
Thermostat and housing parts 1 - hose; 2 - nipple; 3 - hollow screw (models with air conditioning system); 4 - tube (models with air conditioning system); 5 - thermal...

Removal and installation the water pump
Water pump and fan with electromagnetic clutch 1 - electromagnetic clutch; 2 - fan; 3 - pulley; 4 - drive belt; 5 - hub; 6 - shaft and bearings; 7 - casing; 8 - Sliding...

Water pump repair
Note: If the water pump is faulty, it is best to replace it entirely. However, you can limit yourself to replacing the seal and shaft with bearing. Cross section of...

Checking, replacing and adjusting the water pump and generator drive belt
Every 24,000 km, check the drive belt and adjust its tension. Inspect the belt along its entire length to detect possible cracks and wear, and crank the engine to check...

Checking the cooling fan drive clutch
Magnetic clutch Cross section of a fan magnetic clutch 1 - primary disk; 2 - hysteresis disk; 3 - secondary disk; 4 - permanent magnet; 5 - steel disk; 6 - ball bearing...

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W210 (1996-2002)

W124 (1984-1995)