History
BMW M102 Straight-6 engine
The BMW M102 (also known as "M30B32LAE") is a turbocharged straight-6 SOHC piston engine which was produced from 1980–1982. The engine was used in the E23 BMW 745i and superseded by the M106.
It was based on the M30 engine and has a displacement of 3,210 cc (196 cu in). The KKK turbocharger produces 9 PSI of boost and an air-to-air intercooler is used. The M102 produces 188 kW (252 hp) and was used in the BMW E23 7 Series, where it was designated "745i".
Applications:
- 1980–1982 E23 745i
Technical
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Technical details and specifications BMW M102 Engine (1980-1982)
BMW 7 Series (E23) 3.2L 745i
No. of cylinders 6/OHC
Capacity 3210 cc
Firing order 1-5-3-6-2-4
Compression ratio 7.0:1
Suitable for unleaded petrol No
Fuel system Make Bosch L-Jetronic
Ignition system coil Make Bosch 0 221 122 010
Distributor Make Bosch 0 237 304 017
Thermostat opens 80 °C
Starter motor Make Bosch 0 001 314 025
Minimum starting voltage 10.0V
Maximum cranking amps 178-218A
Alternator Make Bosch 0 120 469 539© Motor car History
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Service
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Service Guide BMW M102 Engine (1980-1982)
BMW 7 Series (E23) 3.2L 745i
Spark plugs Electrode gap 0.7-0.8 mm
Spark plugs Tighten 24-28 Nm
Spark plugs Original equipment Bosch W8DC
Spark plugs Make Autolite Type 64
Spark plugs Make Champion N9YCC
Spark plugs Make NGK BP5ES
Valve clearance -INLET 0.30 mm Check cold
Valve clearance -EXHAUST 0.30 mm Check cold
Drive belt size - alternator 12.5x1055mm
Engine oil grade - moderate climate 10W/40 SAE
Engine oil change 5.8 litres
Manual gearbox oil 1.2 litres
Automatic transmission 3.0 litres
Differential oil rear 1.6 litres
Cooling system 12.0 litres© Motor car History
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