Engine cooling and lubrication system Mercedes S-Class (W116)

Engine lubrication system — general information
In eight-cylinder engines, the oil flow is directed to an air-cooled oil cooler; the operation of the radiator is controlled by a thermostat, which directs oil to the...

Removal and installation the oil pump
The oil pump does not require overhaul; if the oil pressure drops due to wear of the pump, it must be replaced. The pump design and dimensions have changed during...

Oil filter
The oil filter is installed on the six-cylinder engine on the left side and on the eight-cylinder engine at the bottom on the right side. The main and additional oil...

Removal and installation the oil pan
Oil pans from six or eight-cylinder engines are removed without removing the engines from the vehicle. However, the amount of work required varies. Eight-cylinder...

Engine cooling system — general information
The engine cooling system is forced, liquid, using antifreeze. Fig. 108 and 109 show the cooling system diagrams of two types of engines. Fig. 108. Cooling diagram of a...

Draining and filling the cooling system
When the engine is hot, slowly open the expansion tank cap and release the steam. In any case, the coolant temperature should not exceed 90°C. Turn both body heater taps...

Cooling liquid
The cooling system is filled with antifreeze at the factory and must be filled with it for the entire period of operation. When mixing antifreeze and water, it is...

Radiator and fan
Checking the radiator cap and radiator The cooling system operates under excess pressure. There is a valve with a spring in the radiator cap that closes the cooling...

Removal and installation the coolant pump
Six-cylinder engine Drain the coolant ( section 5.1.1 ). Remove the radiator ( section 5.2.2 ). Remove the fan with the clutch. Loosen the belt tension and loosen the...

Thermostat — General Information
The thermostat is located in the housing on the cylinder head. A ball valve in the thermostat ensures automatic removal of air from the cooling system when filling with...

Adjusting the tension of the coolant pump drive belts
The arrangement of the drive belts of the units is shown in Fig. 114 for a six-cylinder engine and in Fig. 115 for an eight-cylinder engine. Check the conformity of the...

Lubrication and Cooling System Specifications
Engine lubrication system Type - all engines - combined with gear pump Minimum oil pressure - 0.5 bar - At operating temperature idle speed, 3.0 bar - at 3000 rpm...

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W140 (1991-1998)