Characteristics of the M102 engine
The M102 engine from Mercedes-Benz was produced at the Stuttgart-Untertürkheim Plant between 1990 and 1993. This engine was installed in the Mercedes-Benz 190 W201 and became known for its reliability and durability.
Structure and Materials
The cylinder block of the M102 engine is made of cast iron for strength and resistance to wear. The engine’s power supply system is injection, which promotes accurate fuel metering and improves performance. The engine has an in-line configuration with four cylinders, each with two valves. The piston stroke is 72.2 mm and the cylinder diameter is 89 mm, which, with a compression ratio of 9, provides an engine displacement of 1,797 cubic centimeters.
Performance and Fuel Economy
The M102 engine produces 109 horsepower at 5,500 rpm and 150 Nm of torque at 3,700 rpm. These figures allow the car to provide decent dynamic performance. It is recommended to use fuel with octane number 92 for engine operation.
Fuel consumption for Mercedes-Benz 190 W201 with M102 engine is 11.3 liters per 100 km in the city cycle, 6.7 liters on the highway and 8.7 liters in mixed mode. Oil consumption can reach up to 1500 grams per 1000 km, which is standard for engines of the time.
Service and Life
For the M102 engine it is recommended to use oils with different viscosities including 0W-30, 0W-40, 5W-30, 5W-40, 10W-40 and 15W-40. The engine oil capacity is 5.0 liters and approximately 4.0 liters is filled when changing the oil. The oil change interval is 7000-10000 km to maintain optimum engine performance. The operating temperature of the engine is about 95 degrees Celsius.
According to the factory, the exact life of the engine is not specified, but in practice the M102 engine demonstrates a resource exceeding 400 thousand kilometers, which emphasizes its reliability and durability.
Tuning and Potential
The M102 engine has limited potential for tuning without significant loss of life, which makes it less attractive to motorists who want to increase the power of their car.
The M102 engine from Mercedes-Benz, fitted to the 190 W201, is a reliable and durable powertrain. Its design, based on the use of durable materials and proven technologies, provides excellent performance. With proper maintenance and timely oil change, the engine is able to serve the owner for many years, demonstrating high performance and economy.
Reliability, problems and repair of the Mercedes-Benz 1.8 engine
The younger 1.8-liter version of the 102nd family (which included 2.0, 2.3 and 2.5-liter engines) was created on the basis of a two-liter M102 E20, in the block of which a crankshaft with a piston stroke of 72.2 mm (was 80.25 mm) was installed. The purpose of the small-block was to replace the carbureted 2.0-liter M102s. The cylinder head remained the same as on the M102 E20, eight-valve single camshaft (SOHC 8V) with hydrocompensators valve clearances. Diameter of inlet valves is 43 mm, exhaust valves 39 mm. Fuel injection system Bosch KE-Jetronic.
The timing drive uses a two-row chain, the reliability of which is not too great.
The release of this power unit lasted only three years, after which it was replaced by a new 1.8-liter M111 E18.
M102 E18 engine tuning
Compressor
As mentioned above, the M102 E18 engine is an analog of the M102 E20 with a different crankshaft, respectively, and tuning of this power unit is similar to the two-liter, read about it here.
ENGINE RATING: 3