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BMW M106 Engine (1982-1986)

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Category: Bmw Engines
1980s
Germany
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  • BMW M106 Engine Technical details and specifications (1982-1986) 

    BMW 7 Series (E23) 3.4 745i 

    No. of cylinders 6/OHC
    Capacity 3430 cc
    Compression ratio 8.0:1
    Firing order 1-5-3-6-2-4
    Suitable for unleaded petrol Yes
    Fuel system Make Bosch Motronic
    Fuel system pressure 2.45-2.55 bar
    Ignition coil Make Bosch Type 0 221 118 335
    Distributor Make Bosch No. 0 261 200 013
    Thermostat opens 80°C
    Starter motor Make Bosch Type 0 001 314 025
    Minimum starting voltage 10.0V
    Maximum cranking amps 178-218 A
    Alternator Make Bosch Type 0 120 469 560
    Regulated voltage 13.5-14.6V

    © Motor car History

     

Service

  • BMW M106 Engine Service Guide (1982-1986) 

    BMW 7 Series (E23) 3.4 745i 34 6T A


    Spark plugs Original equipment Bosch Type W8DC
    Spark plugs Electrode gap 0.7-0.8 mm
    Spark plugs Tighten 24-28 Nm
    Spark plugs Make Autolite Type 64
    Spark plugs Make Champion TypeN9YCC
    Spark plugs Make NGK Type BP5ES
    Valve clearance -INLET 0.30mm check cold
    Valve clearance -EXHAUST 0.30mm check cold
    Drive belt size - alternator 12.5x1055mm
    Drive belt tension - alternator 10mm
    Engine oil grade - normal climate 10W/40 SAE or 15W/50 SAE
    Engine oil change 5.8 litres
    Manual gearbox oil grade 80W SAE 1.2 litres
    Automatic transmission fluid Type Dexron II 3.0 litres
    Differential oil rear 90W SAE 1.9 litres
    Cooling system 12.0 litres

    © Motor car History

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BMW M106 Straight-6 Engine

From 1982 to 1986

 BMW M106 Straight-6 Engine From 1982 to 1986
 

The BMW M106 (also called "M30B34MAE") is a turbocharged straight-6 SOHC piston engine which replaced the M102 engine and was produced from 1982 to 1986.

Compared to the M102, the M106 has Bosch Motronic engine management, a higher compression ratio of 8.0:1 and an increased displacement to 3,430 cc (209 cu in).

Peak power output is the same 185 kW (248 hp) as the M102; however, it occurs at lower RPM, using 6 PSI of boost.


Applications:

  • 1982-1986 E23 745i

BMW M106 Straight-6 Engine E23 745i

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