Engine design and adjustment Mercedes E-Class (W123)

General information about engines
General information A four-stroke, four- or six-cylinder, in-line engine is mounted vertically along the vehicle's axis or with a longitudinal tilt at an angle of 15° to...

Cylinder head design and specification
The cylinder head is made of aluminum alloy, the valve seats and guides are inserted. Characteristic Meaning Cylinder head height, mm M 115 nominal 84,8—85,0 minimal...

Design and specification of valves
Valves Characteristic Meaning Eccentricity of valve stems relative to working chamfer, no more than, mm 0,03 Chamfer angle 45° + 15' Minimum height of valve head to...

Cylinder Block Design and Specification
The cylinder block is cast from a special cast iron and is one piece with the cylinders. Characteristic Meaning Height of cylinder block, mm M 102 nominal 292,45—292,55...

Design and specification of the crank mechanism
Pistons Aluminum alloy piston with flat bottom. The piston bottom is marked with a piston diameter mark and an arrow for orienting the piston when installing it in the...

Design and specification of the valve timing mechanism
Overhead drive (SOHC and DOHC) the camshafts are distributed in a single row (engines M 102, M 123) or double row (engines M 110 and M 115) chain. The chain tension is...

Design and specification of engine lubrication system
The pressure lubrication system, created by an internal gear pump with an eccentric rotor, provides lubrication to the crankshaft, connecting rod upper ends and camshaft...

Design and specification of the cooling system
The liquid cooling system includes a radiator, expansion tank, centrifugal water pump and thermostat. Water pump The water pump is mounted on the right side of the...

Power supply system design and specification
Fuel tank The tank is stamped from sheet steel and is located above the rear axle. The fuel reserve indicator lamp comes on when there is less than 9.5 (11.5) liters of...

Design and specification of carburetor engines
Fuel pump The mechanical fuel pump is driven by an eccentric on the intermediate shaft. Characteristic Meaning Vacuum pressure when the starter is turned on, kg/cm²...

Design and specification of fuel injection system
K-Jetronic fuel injection system The engines of the 230 and 280 models were equipped with a mechanical fuel injection system "K-Jetronic" bosch company. The principle of...

Ignition system design and specification
The ignition system is of the classic type, battery-powered. Includes a distributor, coil, spark plugs, power source, high and low voltage wires. Since 1978 model year...

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W210 (1996-2002)

W124 (1984-1995)