The BMW N42 is a DOHC four-cylinder petrol engine which replaced the BMW M43 and was produced from 2001-2004.[1][2]
| BMW N42 engine | |
|---|---|
| Overview | |
| Production | 2001–2004 |
| Layout | |
| Configuration | Inline-4 |
| Displacement |
|
| Cylinder bore | 84 mm (3.31 in) |
| Piston stroke |
|
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC, with VVT & VVL |
| Combustion | |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | BMW M43 |
| Successor | BMW N46 |
The N42 serves as the basis for the smaller N40 engine (which does not have Valvetronic).
The N42B18 won the 1.4-1.8 L category of the International Engine of the Year awards for 2001.[3]
In 2004, the N42 was replaced by the BMW N46 four-cylinder engine.
Design
editCompared with its M43 predecessor, the N42 features a DOHC valvetrain, VANOS (variable valve timing) and an aluminium engine block.[4] It was the first BMW engine to have Valvetronic (variable valve lift).[5][6]
Versions
edit| Version | Displacement | Power | Torque | Year |
|---|---|---|---|---|
| N42B18 | 1,796 cc (109.6 cu in) | 85 kW (114 bhp) at 5,500 rpm |
175 N⋅m (129 lb⋅ft) at 3,750 rpm |
2001-2004 |
| N42B20 | 1,995 cc (121.7 cu in) | 105 kW (141 bhp) at 6,000 rpm |
200 N⋅m (148 lb⋅ft) at 3,750 rpm |
2001-2004 |
N42B18
editThe N42B18 has a displacement of 1,796 cc (109.6 cu in),[1] uses Bosch Motronic ME9.2 engine management[7] and has twin-balancing shafts.[citation needed]
Applications:
- 2001-2004 E46 316i and 316ti
N42B20
editThe N42B20 has a displacement of 1,995 cc (121.7 cu in),[1] uses Bosch DME ME9.2 fuel injection and has twin-balancing shafts.[citation needed] The N42B20 revs to 6600 rpm
Applications:
- 2001-2004 E46 318i/318Ci/318ti
N40
edit| BMW N40 engine | |
|---|---|
| Overview | |
| Production | 2001–2004 |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 1.6 L (1,596 cc) |
| Cylinder bore | 84 mm (3.31 in) |
| Piston stroke | 72 mm (2.83 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC, with VVT |
| Combustion | |
| Fuel type | Petrol |
| Chronology | |
| Predecessor | BMW M43 |
| Successor | BMW N45 |
The BMW N40 is a DOHC four-cylinder petrol engine which replaced the 1.6 litre versions of the BMW M43.[8] It was produced from 2001-2004 and only sold in several countries, where taxes favoured cars with smaller displacement engines. The N40 was replaced by the BMW N45.
Design
editThe N40 is based on the BMW N42 engine and uses the same crankcase, pistons and bore size of 84 mm (3.3 in). The redline is 6,500 rpm.
Unlike the N42, the N40 does not have Valvetronic (variable valve lift). The other major difference is a 9 mm (0.4 in) reduction in stroke to 72.0 mm (2.8 in), which results in a smaller displacement than the N42.
Versions
edit| Version | Displacement | Power | Torque | Years |
|---|---|---|---|---|
| N40B16 | 1,596 cc (97 cu in) | 85 kW (114 bhp)
at 6,100 rpm |
150 N⋅m (111 lb⋅ft)
at 4,300 rpm |
2001–2004 |
Applications:[9]
- 2001-2005 E46 316i/316ci/316ti (certain markets only)
See also
editReferences
edit- ^ a b c "Engine specifications for N42 engines". www.bmwheaven.com. Retrieved 2012-06-03.
- ^ "3'E46 318ci model selection". www.realoem.com. Retrieved 16 March 2017.
- ^ "Archive". www.ukimediaevents.com. Retrieved 22 March 2017.
- ^ "BMW N42B20 Engine". www.mywikimotors.com. Archived from the original on 2 October 2017. Retrieved 1 October 2017.
- ^ "BMW N42 Four Cylinder Valvetronic Engine". www.unixnerd.demon.co.uk. Archived from the original on 7 February 2020. Retrieved 22 March 2017.
- ^ "Valve timing gear, cntrl unit Valvetronic BMW 3' E46, 318Ci (N42) — BMW parts catalog". www.bmwfans.info. Retrieved 3 June 2012.
- ^ "BMW 3 2006 / E46". www.obdtester.com. Retrieved 22 March 2017.
- ^ Lewin, Tony (2004). The Complete Book of BMW: Every Model in the World Since 1962. MotorBooks International. pp. 258–259. ISBN 9781610592055.
- ^ "3'E46 316i model selection". www.realoem.com. Retrieved 12 March 2017.