BMW M42

from Wikipedia, the free encyclopedia
BMW
M42B18 in a BMW E36

M42B18 in a BMW E36
M42
Production period: 1989-1996
Manufacturer: BMW
Working principle: Otto
Motor design: R4
Valve control: DOHC , chain
Displacement: 1796 cm 3
Mixture preparation: Manifold injection
Engine charging: no
Power: 100 kW
Torque: 172 Nm
Previous model: BMW M10
Successor: BMW M44

The BMW M42 is a car gasoline engine by the Bavarian engine manufacturer BMW , which was manufactured from 1989 to 1996. (1989-1991 in the BMW E30 and 1992-1996 in the BMW E36) It is a further development based on the BMW M40 engine , from which it The main difference is a different cylinder head with four instead of two valves per cylinder. The design principle of the cylinder head corresponds to the in-line six-cylinder BMW M50 . In 1992 the engine was technically revised and from now on received a knock control and a variable intake manifold in the E36 .

The engine has four cylinders , two overhead camshafts driven by a double roller chain and bucket tappets . There is a built-in ignition . The crankcase was adopted unchanged from the BMW M40, the crankshaft is forged. With a bore of 84 mm and a piston stroke of 81 mm, the engine has a displacement of 1796 cm³. The nominal power is given as 100 kW at 6000 min −1 . The engine control is a Bosch Motronic M 1.7.

The M42 is considered to be the “sportiest” four-cylinder engine from BMW since the BMW S14 and is also affectionately known as “poorman's M3”. One weak point of the M42 engine is the cylinder head gasket, which usually leaks due to a defective gasket in the control housing on the front of the engine. All M42 engines are said to be affected by this.

Technical specifications

Engine
designation		 Displacement Bore × stroke Valves / cyl. compression Power at 1 / min Torque at 1 / min construction time source
M42B18 1796 cm 3 84 mm × 81 mm 4th 10.0: 1 100 kW (136 hp) at 6000 172 Nm at 4600 1989-1991
103 kW (140 PS) at 6000 175 Nm at 4500 1992-1996

commitment

M42B18 100 kW (136 hp)

M42B18 103 kW (140 PS)

  • 1992–1995 in the BMW E36 318ti / is

literature

Individual evidence

  1. ↑ a b BMW AG (Ed.): BMW M42B18 automobile engine (136 hp) . Retrieved February 22, 2018
  2. ↑ BMW AG (Ed.): BMW M42B18 automobile engine (140 hp) . Retrieved February 22, 2018
  3. ↑ a b BMW AG (Ed.): Operating Instructions BMW E30 . 1990, p. 116
  4. ^ Eric Smith: BMW M44 engine in Australian Car Reviews. Retrieved February 23, 2018
  5. ↑ Hudock: BMW 3 Series - E36 Restoration Tips & Techniques , Chapter 8
  6. ↑ BMW AG (Ed.): Operating Instructions BMW E36 . 1991. p. 127
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