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Mercedes-Benz M 114 6 cylinder engine 

Mercedes Benz
 Mercedes-Benz M 114 6 cylinder engine
M 114
Manufacturer: Mercedes Benz
Production period: 1967-1972
Style: Line six-cylinder
Engines: 2.5 liters (2496 cc)
Previous model: M 108
Successor: M 110

The M 114 is a gasoline engine with six cylinders in series used by Mercedes-Benz , which was produced from 1967 to 1972 in the Mercedes-Benz Models: 230-280/C/E

M114.920

This version was almost identical to the Mercedes-Benz M 108 , the unit differs by the timing, which allow higher torque at low speeds.

  • 6 cylinders in series, cast iron engine block, cylinder head aluminum
  • Bore and stroke: 82 mm × 78.8 mm
  • Displacement: 2496 cc
  • an overhead camshaft
  • two valves per cylinder
  • two Zenith carburetors Type 35 INAT 
  • Compression ratio: 9: 1
  • seven crankshaft bearings
  • Max. Power: 96 kW (130 hp) at 5400rpm
  • Max. Torque: 199 Nm at 3600rpm

Use 

  • Mercedes-Benz 250 (W 114) (1968-1972)
  • Mercedes-Benz 250 C (W 114) (1969-1972)

M114,980 

This engine is equipped with electronic fuel injection, a Bosch D-Jetronic . The M114 was the first Mercedes-Benz engine to be equipped with this technology after mechanical systems were introduced in the 1950s.

Electronic injection Bosch D-Jetronic; Compression ratio: 9.5: 1; Maximum power: 110 kW (150 hp) at 5500rpm Maximum torque: 211 Nm at 4500rpm

Used: Mercedes-Benz 250 CE (W 114) (1969-1972)

Technical

  • Mercedes-Benz Model: 230-280/C/E (114) 2,5 250C Engine code: 114.920 (1968-1972)

    Output: 96 (130) @5400rpm

    No. of cylinders Type 6/OHC
    Capacity 2496 cc
    Compression ratio 9.0:1
    Suitable for unleaded petrol No
    Fuel system Make Zenith Type 35 INAT Carb-2V
    Bosch Ignition coil Type 0 221 102 036
    Firing order 1-5-3-6-2-4
    Distributor Make Bosch No.0 231 116 052
    Distributor Contact breaker gap 0.3mm
    Starter motor MakeBosch Type GF(R)12V1,4PS
    Minimum starting voltage 10V
    Maximum cranking amps 149-182A 
    Alternator/Regulator Make Bosch
    Regulated voltage 13.9-14.8V

    Mercedes-Benz Model: 230-280/C/E (114) 2,5 250E Engine code: 114.980 (1968-1972)

    Output: 112 (150) @5500rpm
    No. of cylinders Type 6/OHC
    Capacity 2496cc 
    Compression ratio 9.5:1
    Suitable for unleaded petrol No
    Fuel system Make Bosch Type Injection MFI-i
    Ignition coil Make Bosch Type 0 221 118 005
    Firing order 1-5-3-6-2-4
    Distributor Make Bosch No.0 231 301 008
    Distributor Contact breaker gap 0.3 mm
    Fuel pump pressure 2-2.1 bar

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Service

  • Mercedes-Benz Model: 230-280/C/E (114) 2,5 250C Engine code: 114.920 (1968-1972)

    Spark plugs Original equipment Bosch Type W5DC

    Spark plugs Electrode gap 0.6-0.8 mm
    Spark plugs Make Champion Type N7YCC
    Spark plugs Make NGK Type BP6ES
    Valve clearance -INLET 0.08mm cold
    Valve clearance -EXHAUST 0.20mm cold
    Engine oil grade - normal climate 10W/30 SAE
    Engine oil with filter 5.5 litres
    Manual gearbox oil 4/5 speed 1.6 litres
    Automatic transmission oil 4.6 litres
    Differential oil rear 1.15 litres
    Cooling system 9.9 litres

    Mercedes-Benz Model: 230-280/C/E (114) 2,5 250E Engine code: 114.980 (1968-1972)

    Spark plugs Original equipment Bosch Type W5DC
    Spark plugs Electrode gap 0.6-0.8mm
    Spark plugs Make NGK Type BP6ES
    Valve clearance -INLET 0.08mm cold 
    Valve clearance -EXHAUST 0.20mm cold
    Engine oil grade - normal climate 10W/30SA
    Engine oil with filter 6.0 litres
    Manual gearbox oil 4/5 speed 1.5 litres
    Automatic transmission oil 4.5 litres
    Differential rear 1.0 litres
    Cooling system 10 litres

    © Motor car History