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• Bmw M73 Engine Repair Manual For Cpx 620 Pickers
• M73 Engine

The BMWM73 is a SOHC V12 petrol engine which replaced the BMW M70 and was produced from 1993-2002. It was used in the BMW E38 7 Series, E31 8 Series and Rolls-Royce Silver Seraph.

Design[edit]

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Bmw M73 Engine Repair Manual For Cpx 620 Pickers

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Compared with its M70 predecessor, the M73 features an updated roller-rocker valve-train and an increased displacement, due to a bore increase of 1 mm (0.04 in) and a stroke increase of 4 mm (0.16 in).^[1] While most other engines in the BMW range had switched to dual overhead camshafts with four valves per cylinder, the M73 used a single overhead camshaft and with two valves per cylinder.^[2]

Some versions of the engine have two separate Bosch Motronicengine control units,^[3] while others use a single Siemens ECU.^[4]

Versions[edit]

M73B54[edit]

Applications:

• 1994-1998 E38 750i/750iL/L7
• 1994-1999 E31 850Ci

M73 Engine

M73TUB54[edit]

Due to more stringent emissions standards, the 1999 model year marked the addition of an electronically heated catalyst,^[5] variable MAP thermostat, and water cooled alternator.

Applications:

• 1998-2001 E38 750i/750iL/L7
• 1999-2002 Rolls-Royce Silver Seraph
• 2013 Monte Carlo Automobile Rascasse

Awards[edit]

• 1999 International Engine of the Year - Best Above 4.0 Litre category winner^[2]

References[edit]

1. ^'Information on M73 engines'. www.bmwheaven.com. Retrieved 5 August 2017.
2. ^ ^ab'BMW Super Bild Of The Day: 5.4 liter BMW V12'. www.bmwblog.com. Retrieved 5 August 2017.
3. ^M73 Training Reference Manual(PDF). p. 2. Retrieved 10 April 2017.
4. ^'E38 750iL Engine electrical system engine'. www.realoem.com. Retrieved 10 April 2017.
5. ^'BMW M70, M72 and M73 V12 Engines'. www.unixnerd.demon.co.uk. Retrieved 5 August 2017.

See also[edit]