Engine Mercedes-Benz M102

Mercedes M102 is a series of inline 4-cylinder gasoline engines from Mercedes-Benz for passenger cars W123, W124, W201 and SUV W460 / 461. The engine appeared in 1980 to replace the M115 series motors and was produced in different volumes and configurations until 1996.

The 102 series of Mercedes engines has been developed from the ground up. Along with the 2.0-liter versions, it includes 1.8 and 2.3-liter engines, as well as sports 2.5-liter ones. The cast iron cylinder block was rebuilt, two types of crankshafts were installed. The cylinder head for 8 valves and with one camshaft did not receive hydraulic valve clearances. The single-row timing chain drive earned fame as an unreliable and quickly out of service part, and in 1987 it was replaced by a double-row chain. The average service life of the timing drive in the M102 E20 motor is 150 thousand kilometers. In 1984, as a result of modernization, the engine received lightweight connecting rods and a crankshaft, as well as hydraulic lifters, other engine mounts and an oil filter.

Specifications

Manufacturer Stuttgart-Untertürkheim Plant
Also called M102
Cylinder block alloy cast iron
Configuration inline
Number of cylinders 4
Compression ratio 9
Fuel type 92
Euro standards up to Euro 1
Oil consumption, gr/1000 km up to 1500
Recommended engine oil 0W-30 / 0W-40 / 5W-30 / 5W-40 / 10W-40 / 15W-40
Engine oil capacity, liter 5.0
Amount of engine oil for replacement, liter ~4.0
Oil change interval, km 7000-10000
Normal engine operating temperature, °C ~95
Engine lifespan, km
— official information
— real

400+

Fuel consumption for different versions of 102 Mercedes engines varies from 6.7 to 7.2 liters per 100 km in highway mode and from 11 to 12 liters per 100 km in city mode (data taken for the Mercedes-Benz 190 (W201) model).

8-valve carburetor versions

Version Model Displacement Piston stroke × Cylinder bore, mm Power Torque output Production years
M102 V20 102.921 2,0 l. 80,25 × 89 66 kW (90 hp) 165 Nm 1982–1984
102.938 63 kW (86 hp) 1982–1984
102.924 77 kW (105 hp) 170 Nm 1984–1986
80 kW (109 hp) 165 Nm 1986–1988
77 kW (105 hp) 160 Nm 1986–1988
2,0 l. 80,2 × 89 165 Nm 1988–1989
75 kW (102 hp) 160 Nm 1988–1989
75 kW (102 hp) 158 Nm 1989–1991
102.920 2,0 l. 80,25 × 89 80 kW (109 hp) 170 Nm 1980–1986
102.939 74 kW (101 hp) 1980–1985
102.922 80 kW (109 hp) 170 Nm 1985–1986
80 kW (109 hp) 165 Nm 1986–1989
77 kW (105 hp) 160 Nm 1986–1990
2,0 l. 80,2 × 89 77 kW (105 hp) 158 Nm 1989–1990
M102 V23 102.944 2,3 l. 80,25 × 95,5 80 kW (109 hp) 174 Nm 1986–1989
102.942 /945 70 kW (95 hp) 170 Nm 1982–1989
102.946 77 kW (105 hp) 182 Nm 1989–1995

Injection 8-Valve Versions

Version Model Displacement Piston stroke × Cylinder bore, mm Power Torque output Production years
M102 E18 102.910 1,8 l. 72,2 × 89 80 kW (109 hp) 150 Nm 1990–1993
M102 E20 102.962 2,0 l. 80,25 × 89 90 kW (122 hp) 178 Nm 1982–1986
87 kW (118 hp) 172 Nm 1985–1988
2,0 l. 80,2 × 89 90 kW (122 hp) 178 Nm 1988–1991
87 kW (118 hp) 172 Nm 1988–1991
90 kW (122 hp) 175 Nm 1991–1993
102.963 2,0 l. 80,25 × 89 90 kW (122 hp) 178 Nm 1985–1989
87 kW (118 hp) 172 Nm 1985–1989
2,0 l. 80,2 × 89 87 kW (118 hp) 172 Nm 1989–1992
102.964 2,0 l. 80,25 × 89 90 kW (122 hp) 178 Nm 1986–1991
87 kW (118 hp) 172 Nm 1986–1991
102.965 2,0 l. 80,2 × 89 87 kW (118 hp) 172 Nm 1990–1994
M102 E23 102.961 2,3 l. 80,25 × 95,5 83 kW (113 hp) 1983–1984
102.985 2,3 l. 80,2 × 95,5 87 kW (122 hp) 1984–1986
100 kW (136 hp) 205 Nm 1986–1991
97 kW (132 hp) 198 Nm 1986–1991
100 kW (136 hp) 200 Nm 1991–1993
102.980 2,3 l. 80,25 × 95,5 100 kW (136 hp) 205 Nm 1980–1986
102.982 97 kW (132 hp) 198 Nm 1985–1989
2,3 l. 80,2 × 95,5 97 kW (132 hp) 198 Nm 1989–1992
102.981 2,3 l. 80,25 × 95,5 92 kW (125 hp) 192 Nm 1982–1985
102.987 2,3 l. 80,2 × 95,5 92 kW (125 hp) 192 Nm 1986–1991
90 kW (122 hp) 188 Nm 1986–1991
102.979 90 kW (122 hp) 188 Nm 1992–1996
102.989 93 kW (126 hp) 190 Nm 1990–1994

Injection 16 Valve Versions

Version Model Displacement Piston stroke × Cylinder bore, mm Power Torque output Production years
M102 E23/2 102.983 2,3 l. 80,25 × 95,5 136 kW (185 hp) 235 Nm 1983–1987
130 kW (177 hp) 230 Nm 1985–1988
125 kW (170 hp) 220 Nm 1985–1988
M102 E25/2 102.990 2,5 l. 87,2 × 95,5 150 kW (204 hp) 240 Nm 1988–1993
143 kW (195 hp) 235 Nm 1988–1993
102.991 2,5 l. 82,8 × 97,3 150 kW (204 hp) 240 Nm 1989
143 kW (195 hp) 235 Nm 1989
102.992 173 kW (235 hp) 245 Nm 1990

Leave a Reply

Your email address will not be published. Required fields are marked *