BMW M40

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BMW
M40B16

M40B16
M40
Production period: 1987-1994
Manufacturer: BMW
Working principle: Otto
Motor design: R4
Valve control: OHC
Displacement: 1596-1795 cm 3
Mixture preparation: Manifold injection
Engine charging: no
Power: 73-85 kW
Previous model: M10
Successor: M43

BMW M40 is a two-valve, four-cylinder gasoline engine made by the Bavarian engine manufacturer BMW , which replaced the BMW M10 at the end of the 1980s . The successor was the BMW M43 .

construction

The M40 is a water-cooled four-cylinder gasoline engine with a crankcase made of gray cast iron . The cylinder distance is 91 mm.

The engine has a cast crankshaft with eight counterweights. The cross-flow cylinder head is made of permanent mold casting. The overhead, belt driven five bearings camshaft of the engine is made of chilled cast iron manufactured and operated per cylinder via rocker arms each to a 14 ° inclined inlet and an outlet; the inlet valve plates are 42 mm in diameter and slightly larger than those of the outlet valves with 36 mm. They have hydraulic valve clearance compensation. Furthermore, the camshaft of the BMW M40, although made of chilled cast iron, is prone to "running in", which is caused by the direct sliding of the rocker arms on the camshaft. The mixture is prepared by means of intake manifold injection , which is regulated by the Bosch Motronic M 1.3. It contains the Lamba probe for the regulated three-way catalytic converter .

Note: The four-valve version is the BMW M42 .

Technical specifications

Technical data M40
Engine type Displacement Bore × stroke Valves / cyl. compression Power at 1 / min Torque at 1 / min Maximum speed catalyst fuel construction time
M40B16 1596 cm 3 84 mm × 72 mm 2 9.0: 1 73 kW (100 PS) at 5500 141 Nm at 4250 6200 min -1 Yes 91 RON 1988-1994
M40B16 1596 cm 3 84 mm × 72 mm 2 9.0: 1 75 kW (102 PS) at 5500 143 Nm at 4250 6200 min -1 No 91 RON 1988-1994
M40B18 1795 cm 3 84 mm × 81 mm 2 8.8: 1 83 kW (113 hp) at 5500 162 Nm at 4250 6200 min -1 Yes 91 RON 1987-1994
M40B18 1795 cm 3 84 mm × 81 mm 2 8.8: 1 85 kW (115 PS) at 5500 165 Nm at 4250 xxxx min −1 No 91 RON

The weight for the variants without a catalytic converter is 132 kg, for the variants with a catalytic converter it is around 134 kg.

use

literature

Web links

Individual evidence

  1. ^ Karlheinz Lange: History of the engine - engine of history (BMW dimensions 1 + 2) . Ed .: BMW Mobile Tradition. 1st edition. tape 2 (1945-2000) , 1999, ISBN 3-932169-04-2 , Chapter 12: In-line engines from 1971, p. 275 .
  2. ↑ M40 seminar material, p. 6.
  3. ↑ M40 seminar material, p. 7.
  4. ↑ M40 seminar material, p. 9.
  5. ↑ M40 seminar material, p. 10.
  6. ↑ M40 seminar material, pp 11 and 12 (with cross-sectional view of the H ydraulischen V entilspiel- A usgleichselementes HVA-element).
  7. ^ Greg Hudock: BMW 3 Series - E36 Restoration Tips & Techniques . Brooklands Books, 2012, ISBN 978-1-85520-970-1 , pp. 8-4 ( limited preview in Google Book search - no page view).
  8. ↑ M40 seminar material, p. 16.
  9. ↑ M40 seminar material, p. 18.
  10. ↑ M40 seminar material, pp. 21 and 22.
  11. ↑ Page of the BMW spare parts catalog for the crankcase of the M40 / M42 (especially the note "M40 / 42/43" at the bottom left of the illustration), accessed February 19, 2018.
  12. ↑ M40 seminar material, p. 3
  13. ↑ BMW: engine data 316i. In: BMW operating instructions E30 3 Series, p. 104, engine data. BMW, 1988, accessed March 16, 2018 .
  14. ^ Karlheinz Lange: History of the engine - engine of history (BMW dimensions 1 + 2) . Ed .: BMW Mobile Tradition. 1st edition. tape 2 (1945-2000) , 1999, ISBN 3-932169-04-2 , Chapter 20: Data, facts, engine directory, p. 517 .
  15. ^ Hans J. Schneider: BMW 5 Series - technology + types, models up to 1997; Bielefeld 2007, ISBN 978-3-7688-5789-5 , pp. 142, 204 and for E34 touring p. 206.
Timeline of BMW gasoline engines for passenger cars since 1961
Number of cylinders Conception 1960s 1970s 1980s 1990s 2000s 2010s
0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
3 1.5 l B38
4th (1.5–2.0 l) M10
M40
M42
M43
M44
N40
N42
N45
N46
N43
N13
N20
B48
High performance motor S14
6th Small six-cylinder (2.0-3.0 l) M20
M50
M52
M54
Large six-cylinder (2.5-3.5 l) M30
N52
N53
N54
N55
B58
High performance motor M88
S38
S50
S52
S54
S55
8th 3.0-4.4 l M60
M62
N62
N63
High performance motor S62
S63
S65
10 High performance motor S85
12 5.0-6.6 l M70
M73
N73
N74
High performance motor S70
Number of cylinders Conception 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
1960s 1970s 1980s 1990s 2000s 2010s