BMW M43

From Wikipedia, the free encyclopedia
BMW M43 engine
BMW M43 Engine 316i Compact 1996.jpg
Overview
Production1991–2002
Layout
ConfigurationInline-4
Displacement1.6–1.9 L (98–116 cu in)
Block materialCast iron
Head materialAluminium
ValvetrainSOHC
Combustion
Fuel typePetrol, CNG
Chronology
PredecessorBMW M40
SuccessorBMW N42

The BMW M43 is an SOHC four-cylinder petrol engine which was produced from 1991-2002.[1] The M43 powered base-model cars, while higher performance models at the time were powered by the BMW M42 and BMW M44 DOHC engines. The M43 was produced at the Steyr engine plant.[2]

A version using natural-gas was produced for the E36 318i and the E34 518i.

Following the introduction of the BMW N42 engine in 2001, the M43 began to be phased out.

Design[]

Compared with its BMW M40 predecessor, the M43 features a knock sensor[3] and a timing chain (instead of the M40's timing belt).[4][5] It also features a dual length intake manifold[6] ("DISA"), to provide torque across a wider rev range.[7]

In 1998 the displacement was increased to 1,895 cc (115.6 cu in), increasing torque to 180 N⋅m (133 lb⋅ft) at 3900 rpm.[1]

Versions[]

Version Displacement Power Torque Year Note
M43B16 1,596 cc (97.4 cu in) 75 kW (101 hp)
at 5500 rpm		 150 N⋅m (111 lb⋅ft)
at 3900 rpm		 1991-1999
60 kW (80 hp)
at 5500 rpm		 127 N⋅m (94 lb⋅ft)
at 3900 rpm		 1995-2000 CNG
M43B18 1,796 cc (109.6 cu in) 85 kW (114 hp)
at 5500 rpm		 168 N⋅m (124 lb⋅ft)
at 3900 rpm		 1993
74 kW (99 hp)
at 5500 rpm		 142 N⋅m (105 lb⋅ft)
at 3900 rpm		 1995-1996 CNG
M43B19 1,895 cc (115.6 cu in) 87 kW (117 hp)
at 5500 rpm		 180 N⋅m (133 lb⋅ft)
at 3900 rpm		 1998
77 kW (103 hp)
at 5300 rpm		 165 N⋅m (122 lb⋅ft)
at 2500 rpm		 1999

M43B16[]

The 1,596 cc (97.4 cu in) M43B16 produces 75 kW (101 hp) and 150 N⋅m (111 lb⋅ft) of torque. It uses the Bosch Motronic 1.7.1 engine management system.[8] There was also a natural gas-powered version of this car (also able to run on petrol) for the 1995 BMW 316g Compact.

Applications:

  • 1993-1999 E36 316i
  • 1995-2000 E36/5 316g Compact

M43B18[]

The M43B18 has a 1,796 cc (109.6 cu in) displacement. It produces 85 kW (114 hp) and 124 lb⋅ft (168 N⋅m) and uses the Bosch Motronic 1.7.1 fuel injection system.[8] There was also a less powerful natural gas-powered version of this car (also able to run on petrol) for the BMW 518g Touring (E34). This model was only available for two years.

Applications:

  • 1992-1998 E36 318i
  • 1994-1996 E34 518i
  • 1995-1996 E34 518g Touring
  • 1995-2001 Z3 1.8

M43B19[]

The M43B19 (also known as the "M43TÜ") is the largest M43 engine, with a displacement of 1,895 cc (115.6 cu in). It produces up to 87 kW (117 hp) and 180 N⋅m (133 lb⋅ft), and uses BMW's BMS 46 engine management system.[8] The 77 kW (105 PS) versions do not have the DISA intake manifold and also have a smaller camshaft compared to the 118 PS versions. Note the M43B16, M43B18 and the M43B19 (118 PS version) all have the same camshaft.

Applications— 77 kW (103 hp) and 165 N⋅m (122 lb⋅ft):

  • 1999-2001 E36 316i
  • 1999-2001 E46 316i

Applications— 87 kW (117 hp) and 180 N⋅m (133 lb⋅ft):

  • 1998-2001 E46 318i/318Ci
  • 2001-2003 Z3 1.9

References[]

  1. ^ a b "Engine specifications for M43 engines". www.bmwheaven.com. Retrieved 3 March 2017.
  2. ^ "BMW M43 engine". www.australiancar.reviews. Retrieved 2 March 2017.
  3. ^ "Motorenkunde über BMW Motoren". www.bmw-syndikat.de (in German). Retrieved 2 March 2017.
  4. ^ "Timing and valve train-timing chain". www.bmwfans.info. Retrieved 3 March 2017.
  5. ^ "Timing and valve train-tooth belt". www.bmwfans.info. Retrieved 3 March 2017.
  6. ^ "BMW M40 and M43 Four Cylinder Engines". www.unixnerd.demon.co.uk. Archived from the original on 28 September 2015. Retrieved 3 March 2017.
  7. ^ "What is a DISA valve?". www.bimmerforums.com. Retrieved 24 February 2017.
  8. ^ a b c "BMW World - 4-Cylinder Engines". www.usautoparts.net. Archived from the original on 2 March 2014.

See also[]

Retrieved from ""