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1
BMW e30 318is walk around m42 engine - my Hillclimb Car
BMW e30 318is walk around m42 engine - my Hillclimb Car
::2013/07/15::
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2
BMW M42 ITB Megasquirt
BMW M42 ITB Megasquirt
::2012/08/19::
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3
BRO Stripes Every Single Bolt on BMW M42 Valve Cover FAIL
BRO Stripes Every Single Bolt on BMW M42 Valve Cover FAIL
::2013/10/02::
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4
BMW E30 318is M42 Chip Install DIY Guide
BMW E30 318is M42 Chip Install DIY Guide
::2012/05/12::
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5
In all her M42 Glory
In all her M42 Glory
::2012/05/25::
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6
BMW 318ti (M42) Rough Idle Fix Via AFM
BMW 318ti (M42) Rough Idle Fix Via AFM
::2012/10/05::
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7
S50 BMW Cam Tray Modification for M42 Engine
S50 BMW Cam Tray Modification for M42 Engine
::2013/01/06::
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8
BMW E30 318is M42 Supersprint Exhaust Sound
BMW E30 318is M42 Supersprint Exhaust Sound
::2010/11/12::
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9
BKCC : Gymkhana day.  Ae
BKCC : Gymkhana day. Ae's BMW E30 M42
::2011/01/26::
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10
BMW E36 318is tuning M42 4 Throttle
BMW E36 318is tuning M42 4 Throttle
::2012/09/09::
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11
BMW E30 318is No Muffler M42
BMW E30 318is No Muffler M42
::2012/04/16::
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12
BMW E30 318is m42 lightened flywheel and balanced engine
BMW E30 318is m42 lightened flywheel and balanced engine
::2011/05/11::
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13
BMW 318is M42 E30 sound exhaust 30-180km/h
BMW 318is M42 E30 sound exhaust 30-180km/h
::2013/01/26::
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14
BMW M42 TURBO  Alacem   N°2
BMW M42 TURBO Alacem N°2
::2011/06/02::
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15
Turbo BMW M42 on Willowsprings One Lap (#3)
Turbo BMW M42 on Willowsprings One Lap (#3)
::2007/08/26::
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16
BMW e30 318is M42 Dyno Run 290 275 Cat Cams, Dblias itb
BMW e30 318is M42 Dyno Run 290 275 Cat Cams, Dblias itb's Sandy Brown
::2014/03/20::
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17
Обзор: наборы для фиксации BMW M42, M50, M52, M54, M56
Обзор: наборы для фиксации BMW M42, M50, M52, M54, M56
::2013/09/30::
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18
Bmw 2002 Ti Alpina with M42 with thottle bodies.
Bmw 2002 Ti Alpina with M42 with thottle bodies.
::2013/07/15::
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19
BMW M42
BMW M42
::2013/04/14::
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20
BMW GTA 320 E21/M42 Carupa Racing
BMW GTA 320 E21/M42 Carupa Racing
::2013/08/11::
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21
BMW e36 318is m42 driveby soundcheck bastuck a5
BMW e36 318is m42 driveby soundcheck bastuck a5
::2012/12/19::
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22
155.7RWHP - Dyno tuning Haltech PS1000 - BMW E30 M3 M42-44 2.0L Rally Car
155.7RWHP - Dyno tuning Haltech PS1000 - BMW E30 M3 M42-44 2.0L Rally Car
::2012/03/16::
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23
1968 BMW 1600 with M42 engine #0 walk through
1968 BMW 1600 with M42 engine #0 walk through
::2014/07/14::
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24
BMW M42 is
BMW M42 is
::2013/01/29::
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25
BMW E36 IS M42 1.8L /16 V OVERHALING
BMW E36 IS M42 1.8L /16 V OVERHALING
::2010/07/10::
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26
First drive of m42 swapped bmw 2002
First drive of m42 swapped bmw 2002
::2012/11/03::
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27
Driving the BMW 318is after repairs.
Driving the BMW 318is after repairs.
::2012/09/30::
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28
BMW m42 running
BMW m42 running
::2014/01/10::
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29
bmw e30 318is m42 castle hillclimb uk sat 13th July 2013 DRIFT
bmw e30 318is m42 castle hillclimb uk sat 13th July 2013 DRIFT
::2013/07/15::
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30
BMW E30 318i M42 Race engine first start.
BMW E30 318i M42 Race engine first start.
::2013/04/03::
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31
Superchargerd bmw M42-Santa pod
Superchargerd bmw M42-Santa pod
::2007/09/23::
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32
bmw m42 motor geräusch
bmw m42 motor geräusch
::2010/08/17::
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33
1968 BMW 1600 with M42 engine #1 start and drive
1968 BMW 1600 with M42 engine #1 start and drive
::2014/07/09::
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34
BMW E30 M42 Engine
BMW E30 M42 Engine
::2011/01/27::
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35
Opel Manta with BMW M42 first test drive
Opel Manta with BMW M42 first test drive
::2013/09/29::
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36
2B BMW E30 M42 290/275 cams ITB idle
2B BMW E30 M42 290/275 cams ITB idle
::2011/07/26::
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37
BMW M42 exhaust flange
BMW M42 exhaust flange
::2012/12/06::
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38
BMW M42 Idle Blip on the Tach
BMW M42 Idle Blip on the Tach
::2012/05/22::
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39
First start for bmw m42 (318 is) engine after 1 year an half (part 2)
First start for bmw m42 (318 is) engine after 1 year an half (part 2)
::2012/07/20::
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40
bmw e30 318is m42 Castle Hillclimb UK Sunday 14th July 2013
bmw e30 318is m42 Castle Hillclimb UK Sunday 14th July 2013
::2013/07/15::
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41
BMW E21 320i with M42 engine
BMW E21 320i with M42 engine
::2007/03/05::
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42
BMW-M42 Rattle.MOV
BMW-M42 Rattle.MOV
::2011/06/15::
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43
BMW M42 TURBO Sambuc Japan Power
BMW M42 TURBO Sambuc Japan Power
::2011/04/24::
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44
BMW M42 loud knocking sound
BMW M42 loud knocking sound
::2012/04/29::
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45
BMW Engine tapping. 93 318i 4cyl M42
BMW Engine tapping. 93 318i 4cyl M42
::2009/03/30::
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46
BMW E30 M42 Oil Change DIY Guide
BMW E30 M42 Oil Change DIY Guide
::2014/06/16::
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47
Opel Manta BMW M42
Opel Manta BMW M42
::2013/09/29::
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48
Bmw M42 Turbo Elverum
Bmw M42 Turbo Elverum
::2009/09/03::
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49
BMW M42 LSD test
BMW M42 LSD test
::2012/01/14::
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50
BMW e30 M42 first track day
BMW e30 M42 first track day
::2013/05/06::
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RESULTS [51 .. 101]
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BMW M42
Overview
Manufacturer BMW
Production 1989–1996
Combustion chamber
Configuration DOHC Straight-4
Displacement 1796 cc
Chronology
Predecessor BMW M40
Successor BMW M44

The BMW M42 is a straight-4 DOHC piston engine produced from 1989 to 1996.[1] Following BMW's typical construction techniques, the motor incorporates a durable cast-iron block and aluminum head. Weight-saving measures include aluminum chain cases, oil sump, motor mount arms, accessory mounts and a cartridge-style oil filter housing. Closely related to the single cam M40, the DOHC 16 valve head and chain-driven cams provided a notable increase in power. It was used in North American versions of the E36 318i instead of the M40. The M42 also incorporated other performance features such as a forged steel crankshaft and welded tubular stainless steel exhaust manifold instead of the more typical cast-iron items. BMW also fitted hydraulic motor mounts to decrease the inline four's inherent noise, vibration and harshness (NVH) compared to the smoother inline sixes already in production at that time.

The M42 went through several minor revisions during production. All versions featured a low-maintenance timing chain with a self-adjusting hydraulic chain tensioner and hydraulic valve tappets. The M42 also incorporated the Bosch Motronic M1.7 DME, eliminating a distributor in favor of fully electronic ignition timing. The DME was configured to fire four individual remotely mounted coils. Furthermore, in markets that required emissions controls, the DME also incorporated an upstream O2 sensor and three-way catalyst.

Early models of the M42 were subject to several recalls. The most common recall was due to frequent failures with a profile gasket sealing the lower cam chain case to the underside of the cylinder head.[2] This gasket seals the primary coolant passage within the timing chain case. A significant failure would thus discharge pressurized steam and hot coolant into the timing chain case. In many cases this coolant rapidly contaminates the motor oil in the sump, causing main bearing failure. Most failures were noted with poorly maintained motors, especially where coolant specifications and mixtures were not observed. BMW updated the profile gasket material and instituted a program to repair motors under warranty. In extreme cases, the aluminum mating surfaces in the head and chain case would corrode.[3]

The earliest versions of the M42 also developed problems with the cam chain drive. The hydraulic tensioner, chain guides, idler wheel and rear lower chain case have all been updated to resolve problems with mechanical wear. Most of these changes were implemented in the M42's closely related successor, the M44. These parts can all be retrofitted to the M42 to improve durability.

When installed in the BMW E30, a two-piece oil pan with a removable front sump was fitted to the M42. This design has two notable problems. The first is a vulnerability to road hazards, as the sump sits fairly low and is not protected by a subframe or cross-member. The aluminum pan will crack instead of deform on significant impacts. Steel skid plates have been developed to resolve this problem and are highly recommended in cases where the front suspension has been modified to improve handling.[4] The second problem is far more significant - the upper oil pan casting incorporates the oil pump's supply passage, and is sealed to the crankcase oil filter housing with a paper gasket. Thermal cycles and engine vibration tend to loosen the six 10mm upper pan mounting bolts inside the motor.[5] Routinely, a loose 10mm bolt or two can be found rattling around high-mileage M42 sumps. If not caught in time, the paper gasket sealing the oil pickup passage can be forced into the crankcase by oil pressure, potentially causing a major loss of oil pressure and/or aeration of the motor oil. Thus it is strongly recommended that any new owner of an early M42 remove the lower pan to inspect these bolts. A permanent solution is to remove & clean the six internal 10mm bolts, apply a thread-locking sealant to the bolts, and re-assemble.

In the final versions of the M42, BMW engineered a dual length intake manifold (called "DISA" by BMW)[6]

Models[edit]

M42B18[edit]

The M42B18 has a displacement of 1,796 cc, which is achieved through a bore of 84 mm and a stroke of 81 mm.[6] The engine uses Bosch Motronic 1.7 fuel injection. Versions equipped with a catalytic convertor produce 100 kW and 172 Nm.[1] and meets with Euro2 norms.

Engine Displacement Power Torque Redline Year
M42B18 1,796 cc 103 kW (140 PS; 138 hp) @ 6,000 175 N·m (129 lb·ft) @ 4,500 6,400 +-30 1989-1996

Applications:

  • 1989-1991 E30 318i (only North American models)
  • 1989–1991 E30 318iS
  • 1992–1996 E36 318i/318ti (only North American and South African models)
  • 1992–1996 E36 318iS
  • 1996 Z3[7]

S42B20[edit]

A racing version of the M42 Engine, called the S42 is known. It was used in BMW's 320 4-door touring car, participating in the German racing series called STW (Super Tourenwagen Cup). It differed by having individual throttle bodies (ITB) for each cylinder and its capacity was enlarged to 1999 cc. It had eight fuel injectors instead of the standard four. Valve cover and airbox were entirely made of carbon fiber. Lubrication was provided by a dry sump system. Compression ratio was increased and a lightweight head installed.

Horsepower evolution steps of the S42 Engine:

Year 1995 1996 1997
300 hp (224 kW) 308 hp (230 kW) 315 hp (235 kW)

In its final evolution, this engine develops 158 HP/l.

See also[edit]

References[edit]

External links[edit]

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