BMW M337

BMW M337
BMW M337
	BMW 501- the first car to use the M337
Overview
Production	1952-1958
Layout
Configuration	Straight-6
Displacement	2.0–2.1 L (122–128 cu in)
Block material	Cast iron
Head material	Cast iron
Valvetrain	OHV
Combustion
Fuel type	Petrol
Chronology
Predecessor	BMW M78
Successor	BMW M30

The BMW M337 is a straight-6 OHV petrol engine which was produced in three variants (M337/1, M337/2 and M337/3) from 1952-1958. Built to power BMW's first new car after World War II, the M337 engine was a replacement for the BMW M78.

Design

Compared with its M78 predecessor, the M337 features a revised cylinder head, a new inlet manifold and a reinforced crankshaft with bigger, more modern bearings.[1]^(p88)[2] As per the M78, the M337 has an iron engine block, an iron cylinder head and overhead valves with two valves per cylinder.[3]^(p46)

Versions

Model	Displacement	Power	Torque	Year
337/1	1,971 cc (120.3 cu in)	48 kW (64 hp) at 4,400 rpm	129 N⋅m (95 lb⋅ft) at 2,000 rpm	1952-1954
337/2	1,971 cc (120.3 cu in)	54 kW (72 hp) at 4,400 rpm	130 N⋅m (96 lb⋅ft) at 2,500 rpm	1954-1955
337/3	2,077 cc (126.7 cu in)	54 kW (72 hp) at 4,400 rpm	135 N⋅m (100 lb⋅ft) at 2,500 rpm	1955-1958

M337/1

The first version of the M337 engine has a displacement of 120.3 cu in (1,971 cc). It produces 48 kW (64 hp) at 4,400 rpm and 129 N⋅m (95 lb⋅ft) at 2,000 rpm.[4]

Applications:

1952-1954 501

M337/2

In 1954, a revised engine was released which produced 54 kW (72 hp) at 4,400 rpm and 130 N⋅m (96 lb⋅ft) at 2,500 rpm.[1][4][3]^(p48) The compression ratio for this engine is 6.8:1.

Applications:

1954-1955 501A
1954-1955 501B

M337/3

The final version of the M337 had an increase in bore of 2 mm (0.079 in) , which increased displacement to 2,077 cc (126.7 cu in). The compression ratio was also increased to 7.0:1. Despite these changesm the M337/3 produced no more power than the previous version. However torque increased to 135 N⋅m (100 lb⋅ft) at 2,500 rpm.[1]^(p92)[4]

Applications:

1955-1958 501/3

gollark: as a package maintainer.

gollark: So do you *still* have to bump dependency versions whenever an update happens?

gollark: `commandlinetoolwhichmanagespackages`

gollark: Can you update *everything* at once?

gollark: And what's the workflow for maintainers?

References

Norbye, Jan P. (1984). BMW - Bavaria's Driving Machines. Skokie, IL: Publications International. ISBN 0-517-42464-9.
"Auto- und Motorrad-Welt" (in German). Köln: Deutscher Sportverlag Kurt Stoof. 20 March 1953. Cite journal requires |journal= (help)
Noakes, Andrew (2008). The Ultimate History of BMW. Parragon Books. ISBN 978-1-4075-3512-8.
"BMW M337". www.6enligne.net. Archived from the original on 11 June 2012.

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[Norbye-1] Norbye, Jan P. (1984). BMW - Bavaria's Driving Machines. Skokie, IL: Publications International. ISBN 0-517-42464-9.

[DeutscherSportverlag-2] "Auto- und Motorrad-Welt" (in German). Köln: Deutscher Sportverlag Kurt Stoof. 20 March 1953. Cite journal requires |journal= (help)

[noakes_ultimate_history-3] Noakes, Andrew (2008). The Ultimate History of BMW. Parragon Books. ISBN 978-1-4075-3512-8.

[6enligne-4] "BMW M337". www.6enligne.net. Archived from the original on 11 June 2012.