BMW M10
Template:Infobox automobile engine
The BMW M10 is a SOHC inline-4 petrol engine which was produced by BMW from 1962-1988. It was the company's first four-cylinder engine since the BMW 309 ended production in 1936 and was introduced in the New Class sedans.
The M10 was used in many BMW models, with over 3.5 million being produced during its 26 year production run.<ref name="usautoparts">Template:Cite web</ref>
The turbocharged BMW M12 engine— used in the Formula One racing— was based on the M10 engine block and produced up to Template:Convert in qualifying trim.Template:Cn
Following the introduction of the BMW M40 engine in 1987, the M10 began to be phased out.
Development
Baron Alex von Falkenhausen — an engineer and racing driver — designed the M10 in the late 1950s.<ref name="usautoparts" /> He was asked by BMW to design an engine with a displacement of Template:Convert, but felt that this would be insufficient for the company's future needs. He convinced management that the minimum capacity should be Template:Convert, and offered an engine that could be expanded to a maximum of Template:Convert.
Design
The M10 has a cast iron block and an aluminum alloy head with hemispherical combustion chambers and two valves per cylinder.<ref>Template:Cite web</ref> It features a forged crankshaft, counterbalance weights, five main bearings and a chain-driven camshaft.<ref>Template:Cite web</ref>
The initial version of the M10 had a bore of Template:Convert and a stroke of Template:Convert, resulting in a displacement of Template:Convert. The peak power rating was Template:Cvt.<ref>Template:Cite webTemplate:Dead link</ref><ref>Template:Cite news</ref>
Naming conventions
The engine was initially known as the "M115" (the last two digits representing the 1.5–litre capacity). Over the years, variants of the engine were given various codes (most of them starting with "M1" and the remaining digits relating to the capacity). In 1975, the engine became known as the "M10", then in 1980 it was given the standardised BMW engine code of M10B18 (where "M10" represents the series, B represents petrol (Benzin in German) and the "18" represented its then 1.8–litre capacity).
The M115 and all related engines have become retroactively known as the "M10" family.
Versions
| Version | Displacement | Power | Torque | Year |
|---|---|---|---|---|
| M115 | Template:Convert | Template:Cvt at 5800 rpm |
Template:Convert at 3700 rpm |
1974–1977 |
| Template:Cvt at 5700 rpm |
Template:Convert at 3000 rpm |
1962-1964 | ||
| M116 | Template:Convert | Template:Cvt at 5800 rpm |
Template:Convert at 3500 rpm |
1964–1975 |
| Template:Cvt at 6000 rpm |
Template:Convert at 4500 rpm |
1967–1968 | ||
| M41 | Template:Cvt at 6000 rpm |
Template:Convert at 4000 rpm |
1975-1980 | |
| M98 | Template:Cvt at 5800 rpm |
Template:Convert at 3200 rpm |
1981-1983 | |
| M10B18 | Template:Convert | Template:Cvt at 5800 rpm |
Template:Convert at 3500 rpm |
1980-1983 |
| Template:Cvt at 5800 rpm Template:Cvt |
Template:Convert at 4500 rpm Template:Convert |
1980–1988 S/CH<ref name=TV218226>Template:Cite magazine</ref> | ||
| M118 | Template:Convert | Template:Cvt at 5,250 rpm |
Template:Convert at 3000 rpm |
1963–1974 |
| Template:Cvt at 5800 rpm |
Template:Convert at 4000 rpm |
1964–1976 | ||
| Template:Cvt at 6100 rpm |
Template:Convert at 5100 rpm |
1964-1965 | ||
| M05 | Template:Convert | Template:Cvt at 5500 rpm |
Template:Convert at 3000 rpm |
1968–1976 |
| Template:Cvt at 5600 rpm |
Template:Convert at 3500 rpm |
1965–1971 | ||
| M17 | Template:Cvt at 5800 rpm |
Template:Convert at 3700 rpm |
1972-1977 | |
| M15 | Template:Cvt at 5800 rpm |
Template:Convert at 4500 rpm |
1970–1974 | |
| M43 | Template:Cvt at 5800 rpm |
Template:Convert at 3700 rpm |
1975-1983 | |
| M64 | Template:Cvt at 5700 rpm |
Template:Convert at 4350 rpm |
1975-1979 | |
| M10B20 | Template:Cvt at 5700 rpm |
Template:Convert at 4350 rpm |
1977-1979 | |
| M31 | Template:Convert turbo |
Template:Cvt at 5800 rpm |
Template:Convert at 4000 rpm |
1973-1975 |
1499 cc engines
The M115 version has a displacement of Template:Convert and produces Template:Convert. It has a bore of Template:Convert and a stroke of Template:Convert. Lower power models have a compression ratio of 8.0:1, while higher power models have a compressions ratio of 8.8:1. Fuel is supplied via a Solex 38 PDSI carburettor.
Applications:<ref>Template:Cite web</ref><ref>Template:Cite web</ref>
1573 cc engines
The M116 version has a displacement of Template:Convert and produces Template:Convert. It has a bore of Template:Convert and a stroke of Template:Convert. The standard specification has a compression ratio of 8.6:1 and uses a Solex 38 PDSI carburettor. The 1600 ti version has a compression ratio of 9.5:1 and uses twin Solex 40 PHH carburettors.
Applications:
- 1964-1966 BMW 1600— Template:Convert
- 1966-1975 BMW 1600-2/1602— Template:Convert
- 1967-1968 BMW 1600 ti— Template:Convert
The M41 version produces Template:Cvt, has an 8.3:1 compression ratio and fuel is supplied by a Solex 32 DIDTA carburettor.
Applications:
- 1975-1980 E21 316
The M98 version produces Template:Convert, has a compression ratio of 9.5:1 and uses a Pierburg 1B2 carburettor.
Applications:<ref>Template:Cite web</ref>
- 1981-1983 E21 315
Template:Anchor 1766 cc engines
The M10B18 version has a displacement of Template:Cvt and produces Template:Cvt, depending on specification. The bore is Template:Convert and the stroke is Template:Convert.
Applications:
- 1969-1972 1800— Template:Convert, 8.6:1 compression, Solex 36-40 PDSI carburettor
- 1971-1975 1802— Template:Convert, 8.6:1 compression, Solex 38 PDSI carburettor
- 1980-1983 E21 320i/320is— U.S. only, Template:Convert, 8.8:1 compression, Bosch K-Jetronic mechanical fuel injection
- 1980-1983 E12 518— South Africa only, Template:Convert, 10.0:1 compression, Bosch K-Jetronic mechanical fuel injection
- 1982-1987 E30 316 — Template:Convert, 9.5:1 compression, Pierburg 2BE carburettor, Ecotronic.
- 1982-1988 E30 318i— Template:Convert, 10.0:1 compression, Bosch L-Jetronic electronic fuel injection
- 1981-1988 E28 518i— Template:Convert, 9.5:1 compression, Bosch LE-Jetronic mechanical fuel injection.
Template:Anchor 1773 cc engines
The M118 version has a displacement of Template:Cvt and produces Template:Cvt,<ref>Template:Cite web</ref> depending on specification. The bore is Template:Convert and the stroke is Template:Convert.
Applications:<ref>Template:Cite web</ref>
- 1963-1968 1800— Template:Cvt, 8.6:1 compression, Solex 36-40 PDSI carburettor
- 1963-1966 1800ti— Template:Cvt, 9.5:1 compression, twin Solex 40 PHH carburettors
- 1964-1965 1800tiSA— Template:Cvt, 10.5:1 compression, twin Weber DCOE-45 carburettors
- 1974-1981 E12 518— Template:Cvt, 8.6:1 compression, Solex 38 PDSI carburettor
Template:Anchor1990 cc engines
The M05 version has a displacement of Template:Cvt and produces Template:Cvt, depending on specification. It has a bore of Template:Cvt and a stroke of Template:Cvt.
Applications:
- 1965-1970 BMW 2000CS— Template:Cvt, 9.3:1 compression, 2x Solex 40 PHH carburettors
- 1966-1970 BMW 2000C— Template:Cvt, 8.5:1 compression, Solex 40 PDSI carburettor
- 1966-1972 BMW 2000— Template:Cvt, 8.5:1 compression, Solex 40 PDSI carburettor
- 1966-1971 BMW 2000ti— Template:Cvt, 9.3:1 compression, 2x Solex 40 PHH carburettors
- 1968-1976 BMW 2002— Template:Cvt, 8.5:1 compression, Solex 40 PDSI carburettor
The M15 version used the Kugelfischer mechanical fuel injection and produced Template:Cvt. It was also known as the tii engine.
Applications:
The M17 version produces Template:Cvt. It has compression ratio of 9.0:1 and uses either a Stromberg 175 CDET or a Solex 4A1 carburettor.Template:Citation needed
Applications:
- 1972-1977 E12 520
The M43/1 version has a compression ratio of 8.1:1 and produces Template:Convert.
Applications:
- 1975-1979 E21 320— Solex 32-32 DIDTA carburettor
- 1975-1979 E21 320i— USA only, Bosch K-Jetronic mechanical fuel injection
The M64 version produces Template:Convert. It has a compression ratio of 9.3:1 and uses Bosch K-Jetronic mechanical fuel injection.
Applications:
The M31 version uses a KKK BLD turbocharger operating @ 7psi and produces Template:Convert. It has a compression ratio of 6.9:1 and uses Schafer PL 04 mechanical fuel injection.
Applications:
- 1973-1975 2002 turbo
Related engines
- The highly successful M12 turbocharged motorsport engine was based on the M10 engine block.
- The S14 engine used in the E30 M3 was based on the M10 block.<ref>Template:Cite web</ref>