Characteristics of the M102 engine
| Parameter | Value |
|---|---|
| Manufacturing | Stuttgart-Untertürkheim Plant |
| Engine make | M102 |
| Years of manufacture | 1980-1996 |
| Cylinder block material | cast iron |
| Power system | Carburetor/injector |
| Type | row |
| Number of cylinders | 4 |
| Valves per cylinder | 2 |
| 4 (for M102.983) | |
| Piston stroke, mm | 80.25 |
| 80.2 | |
| Cylinder diameter, mm | 95.5 |
| Compression ratio | 8-9 (see modifications) |
| Engine displacement, cc | 2298 |
| 2299 | |
| Engine power, hp/rpm | 95-185/5200-6200 |
| (see modifications) | |
| Torque, Nm/rpm | 170-235/2500-4500 |
| (see modifications) | |
| Fuel | 92 |
| Environmental standards | up to Euro 1 |
| Engine weight, kg | ~165 |
| Fuel consumption, l/100 km | |
| – city | 12.0 |
| – highway | 7.2 |
| – mixed | 9.0 |
| Oil consumption, gr./1000 km | to 1500 |
| Engine oil | 0W-30 |
| 0W-40 | |
| 5W-30 | |
| 5W-40 | |
| 10W-40 | |
| 15W-40 | |
| How much oil in the engine, liters | 5.0 |
| 4.5 (before 10.1984) | |
| When replacing, pour, l | ~4.0 |
| Oil change is carried out, km | 7000-10000 |
| Engine operating temperature, deg. | ~95 |
| Engine life, thousand kilometers | |
| – according to the plant | – |
| – in practice | 400+ |
| Tuning, hp | |
| potential | 300+ |
| – without loss of resource | – |
| Motor installed | Mercedes-Benz 190 W201 |
| Mercedes-Benz E-Class W124 | |
| Mercedes-Benz G-Class W460 | |
| Mercedes-Benz G-Class W461 | |
| Mercedes-Benz G-Class W463 | |
| Mercedes-Benz W123 | |
| Mercedes-Benz T1 | |
| Mercedes-Benz T2 |
M102 E23/V23 engine modifications
- M102.942/M102.945 (1982 – 1986) – the first carbureted version with an output of 95 hp at 5200 rpm, torque 170 Nm at 2500 rpm. Pierburg 1B1 carburetor, compression ratio 9. It was used on Mercedes T1 and T2.
- M102.944 (1986 – 1989) – carbureted version for Mercedes-Benz Gelandewagen, carburetor Stromberg 175 CDTU, power 109 hp at 5300 rpm, torque 174 Nm at 2000 rpm.
- M102.946 (1989 – 1995) – analog of the above with Pierburg carburetor, power 105 hp at 5100 rpm, torque 182 Nm at 2000 rpm. It was used on Mercedes-Benz T1 and T2.
- M102.980 (1980 – 1986) – the first version of M102 in 2.3 liter version, Bosch K-Jetronic fuel injection, compression ratio 9, power 136 hp at 5100 rpm, torque 205 Nm at 3500 rpm. Used on Mercedes-Benz W123.
- M102.981 (1982 – 1985) – analog of the above engine for Mercedes-Benz Gelandewagen W460, compression ratio 9, power 125 hp at 5000 rpm, torque 192 Nm at 4000 rpm.
- M102.982 (1985 – 1992) – modified M102.980 with Bosch KE-Jetronic injection, compression ratio 9, power 132 hp at 5100 rpm, torque 198 Nm at 3500 rpm. The engine was used in the Mercedes-Benz W124.
- M102.983 (1983 – 1988) – sporty version with 16-valve cylinder head developed by Cosworth. Bosch KE-Jetronic injection, compression ratio 10.5, power 185 hp at 6200 rpm, torque 235 Nm at 4500 rpm. This version was called ECE. Since 1985, ECE was replaced by RUF, with a compression ratio of 9.7, and power reduced to 177 hp at 5800 rpm, 230 Nm of torque at 4750 rpm. Since 1985, a catalytic converter version of the RUF called KAT was also produced, with an output of 170 hp at 5800 rpm and 220 Nm of torque at 4750 rpm. The engine was used in the Mercedes-Benz W201.
- M102.985 (1984 – 1993) – analog of M102.982 for use in Mercedes W201. Compression ratio 9, power 132 hp at 5100 rpm, torque 198 Nm at 3500 rpm.
- M102.985 (1984 – 1993) – analog of M102.982 for use in Mercedes W201.
- M102.987 (1986 – 1991) – analog of M102.981 with Bosch KE-Jetronic injection and crankshaft with a stroke of 80.2 mm (displacement 2298 cm³), compression ratio 9, power 125 hp at 5000 rpm, torque 192 Nm at 4000 rpm. The engine was used in Mercedes-Benz Gelandewagen W460.
- M102.989 (1990 – 1994) – analog of M102.987 for Mercedes-Benz Gelandewagen W463, output 126 hp at 5000 rpm, torque 190 Nm at 4000 rpm.
- M102.979 (1990 – 1994 years) – analog of M102.987 for Mercedes-Benz Gelandewagen W461, power 122 hp at 5100 rpm, torque 188 Nm at 4000 rpm
Reliability, problems and repair of Mercedes M102 2.3L engine
M102 AMG The Mercedes-Benz M102 E23 engine, with a working volume of 2.3 liters, appeared in 1980, as the older brother of the two-liter M102 (later the family was supplemented with 1.8 and 2.5-liter modifications) and represented a replacement for the M115 V23. The new 102 engine has a newly developed lightweight cast iron cylinder block, with crankshafts with a stroke of 80.25 mm and 80.2 mm. Completely new and cylinder head, with one camshaft and eight valves, hydrocompensators valve clearances until 1984 were not used and valves need to be adjusted manually every 10 thousand kilometers. Valve clearances: inlet 0.15 mm, exhaust 0.3 mm. Diameter of inlet valves is 46 mm, exhaust valves 39 mm.
The timing drive is chain, the chain is single-row and unreliable, since 1987 there was a double-row chain, the resource of which has slightly increased.
In 1984, the M102 V23/E23 engine was slightly modernized, instead of heavy connecting rods and crankshaft, light ones were put, hydrocompensators were added and the problem of valve adjustment disappeared, engine supports and oil filter were changed.
In 1992, a new M111 E23 engine was introduced to replace the outdated M102 E23, which it did for the next four years.
Mercedes-Benz M102 2.3L engine problems and shortcomings
The M102 E23 engine is similar to its younger counterpart the M102 E20, not surprisingly the problems of these powerplants are the same, you can read about them in detail here.
Mercedes M102 E23 / V23 engine tuning
Compressor
Speaking of refining the Mercedes 102 series should remember its age and forget about borings with top shafts. The first and most reasonable way of tuning M102 E23 is to order a contract engine Mercedes M111 Compressor with the subsequent swap into your car, or buy a more powerful and fresh Mercedes-Benz. The second and less reliable option is to buy an Eaton M45 Compressor or AutoTurbo RK-23 with intercooler, with injectors from a more powerful car, tuning on Janvar and get your 30-50 hp.
MOTOR RATING: 3