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BMW 318is (E30) M42 Stroker
BMW 318is (E30) M42 Stroker
Published: 2015/05/25
Channel: Daniel Blyum
Part 2 BMW E36 318i M42 M44 Engine Timing Complete Procedure
Part 2 BMW E36 318i M42 M44 Engine Timing Complete Procedure
Published: 2016/04/07
Channel: Nathan's DIY Garage
BMW E30 M42 Valve Cover Gasket Replacement DIY Guide
BMW E30 M42 Valve Cover Gasket Replacement DIY Guide
Published: 2015/07/19
Channel: BluePurpleRed Guides
BMW E30 M42 Build RHD ITB kit with carbon airbox
BMW E30 M42 Build RHD ITB kit with carbon airbox
Published: 2017/05/28
Channel: TAG Engineering Racing Parts Development
bmw m42 2082cc diesel crank, e36 m3 throttle bodies, 86mm pistons, custom camshafts
bmw m42 2082cc diesel crank, e36 m3 throttle bodies, 86mm pistons, custom camshafts
Published: 2015/10/18
Channel: jerseytim100
BMW E36 318is rebuilt M42 B18 w/ ITB
BMW E36 318is rebuilt M42 B18 w/ ITB's running E85
Published: 2015/06/07
Channel: juggalojean
1968 BMW 1600 with M42 engine #1 start and drive
1968 BMW 1600 with M42 engine #1 start and drive
Published: 2014/07/09
Channel: Rob Siegel
E30 318is Stock Exhaust Sound (M42)
E30 318is Stock Exhaust Sound (M42)
Published: 2016/11/21
Channel: Bairdogg
E30 M42 Plug and Play Megasquirt
E30 M42 Plug and Play Megasquirt
Published: 2017/02/10
Channel: TheEverythingGuyE30
BMW Low Compression Easy Fix For Free !!! M44 M42 M50 M52 M52tu M54 M56 N52 N54 M62
BMW Low Compression Easy Fix For Free !!! M44 M42 M50 M52 M52tu M54 M56 N52 N54 M62
Published: 2016/04/07
Channel: Nathan's DIY Garage
BMW E30 M42B18 before and after flywheel lightening
BMW E30 M42B18 before and after flywheel lightening
Published: 2014/10/04
Channel: Marko
BMW e30 is M42B18 207 HP / 213 Nm Dyno Test
BMW e30 is M42B18 207 HP / 213 Nm Dyno Test
Published: 2014/05/12
Channel: Adam Walenda
BMW M42 ITBS Tune Getting Close
BMW M42 ITBS Tune Getting Close
Published: 2016/01/30
Channel: Ari Pettigrew
BMW E30 318i 91 stock m42 fun behind waltmart Cuban owner
BMW E30 318i 91 stock m42 fun behind waltmart Cuban owner
Published: 2014/06/25
Channel: Manuel Cabada
BMW E30 318is m42 lightened flywheel and balanced engine
BMW E30 318is m42 lightened flywheel and balanced engine
Published: 2011/05/11
Channel: kinetic customs
BMW e36 m42 schrick cam idle
BMW e36 m42 schrick cam idle
Published: 2014/07/13
Channel: 4bangerSA
BMW M42 with 4 of the individual throttle bodies from a M3 E36
BMW M42 with 4 of the individual throttle bodies from a M3 E36
Published: 2014/08/20
Channel: jerseytim100
bmw m42 2082cc stroker engine
bmw m42 2082cc stroker engine
Published: 2015/10/12
Channel: jerseytim100
Bmw E30 M42 pure sound...
Bmw E30 M42 pure sound...
Published: 2015/01/09
Channel: M42 Goon
E30 318is 1989 rebuilt M42 - first start
E30 318is 1989 rebuilt M42 - first start
Published: 2015/09/14
Channel: Pvm
bmw m42 1800cc itb
bmw m42 1800cc itb's from an e36 m3 almost straight fit
Published: 2014/08/24
Channel: jerseytim100
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
Published: 2014/03/20
Channel: graham waldron
BMW E36 318 M42 with RHD ITB kit and stand alone Ecu, faster rpm response
BMW E36 318 M42 with RHD ITB kit and stand alone Ecu, faster rpm response
Published: 2016/06/18
Channel: TAG Engineering Racing Parts Development
BMW E30 M42 Drive Around
BMW E30 M42 Drive Around
Published: 2015/02/05
Channel: Ge Ma
BMW E30 M42 Oil Change DIY Guide
BMW E30 M42 Oil Change DIY Guide
Published: 2014/06/16
Channel: BluePurpleRed Guides
BMW 318is M42 rev problem
BMW 318is M42 rev problem
Published: 2015/06/04
Channel: Gytis Degutis
1991 BMW 318is E30 M42 Total Restoration Project
1991 BMW 318is E30 M42 Total Restoration Project
Published: 2017/07/28
Channel: Hand Built Cars
BMW E30 M42 w/ Dynomax Turbo Muffler before and after
BMW E30 M42 w/ Dynomax Turbo Muffler before and after
Published: 2009/08/28
Channel: nick brema
M42 Turbo 10psi E30 318is BMW Dyno Pull 3
M42 Turbo 10psi E30 318is BMW Dyno Pull 3
Published: 2011/12/17
Channel: crystalworks1
BMW E30 318is M42 Chip Install DIY Guide
BMW E30 318is M42 Chip Install DIY Guide
Published: 2012/05/12
Channel: BluePurpleRed Guides
In all her M42 Glory
In all her M42 Glory
Published: 2012/05/25
Channel: metricmechanic
BMW E36 318i M42 M44 M43 ICV IAC  Fix Hard to Start Fuel Trim and Lean codes
BMW E36 318i M42 M44 M43 ICV IAC Fix Hard to Start Fuel Trim and Lean codes
Published: 2016/05/08
Channel: Nathan's DIY Garage
BMW M44 / M42 ITB Kit
BMW M44 / M42 ITB Kit
Published: 2015/04/17
Channel: Lambertius
fitting itbs to the BMW M42
fitting itbs to the BMW M42
Published: 2017/07/11
Channel: jerseytim100
BMW e36 318is (m42) idle problems
BMW e36 318is (m42) idle problems
Published: 2013/01/05
Channel: Frikkern
E30 318is M42 Turbo 313whp Vs. E36 2JZ
E30 318is M42 Turbo 313whp Vs. E36 2JZ
Published: 2014/01/04
Channel: Chris .Phares
BMW m42 на январе 5.1 первые попытки запуска
BMW m42 на январе 5.1 первые попытки запуска
Published: 2015/08/26
Channel: Алексей Добровольский
BMW e30 318is walk around m42 engine - my Hillclimb Car
BMW e30 318is walk around m42 engine - my Hillclimb Car
Published: 2013/07/15
Channel: graham waldron
S50 BMW Cam Tray Modification for M42 Engine
S50 BMW Cam Tray Modification for M42 Engine
Published: 2013/01/06
Channel: fiatnutz
BMW e36 318is m42 coupe only chip and 205/50/15
BMW e36 318is m42 coupe only chip and 205/50/15
Published: 2015/11/24
Channel: Gti Limit
BMW E36 M42 1796cc with RHD Open ITB Kit Running Test!!!!!
BMW E36 M42 1796cc with RHD Open ITB Kit Running Test!!!!!
Published: 2016/04/15
Channel: TAG Engineering Racing Parts Development
BMW 318is m42 engine
BMW 318is m42 engine
Published: 2009/04/14
Channel: mykynawaxik
BMW E36 318is Coupe (M42) Sebring Muffler Exhaust Sound
BMW E36 318is Coupe (M42) Sebring Muffler Exhaust Sound
Published: 2012/01/04
Channel: bluelayer109
BMW 318is M42 E30 sound exhaust 30-180km/h
BMW 318is M42 E30 sound exhaust 30-180km/h
Published: 2013/01/26
Channel: nissejarnet
BMW 318ti (M42) Rough Idle Fix Via AFM
BMW 318ti (M42) Rough Idle Fix Via AFM
Published: 2012/10/05
Channel: T I T I F A N U A P H O T O G R A P H Y
Запуск двигателя m42 после переборки
Запуск двигателя m42 после переборки
Published: 2013/07/07
Channel: Kirill Gorbunov
Entrada falsa de aire BMW E36 M42.wmv
Entrada falsa de aire BMW E36 M42.wmv
Published: 2012/12/18
Channel: Marc Fradera
BMW E30 318is No Muffler M42
BMW E30 318is No Muffler M42
Published: 2012/04/16
Channel: Mitchell Bell
bmw 318is 1991, M42 engine... timing chain problem ?
bmw 318is 1991, M42 engine... timing chain problem ?
Published: 2009/08/27
Channel: doyp2102
BMW M42 loud knocking sound
BMW M42 loud knocking sound
Published: 2012/04/29
Channel: jurgen4life
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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BMW M42
BMW M42B18 Motor.JPG
Overview
Manufacturer BMW
Production 1989–1996
Combustion chamber
Configuration DOHC Straight-4
Displacement 1,796 cc (110 cu in)
Chronology
Predecessor BMW M40
Successor BMW M44

The BMW M42 is a straight-4 DOHC piston engine produced from 1989 to 1996.[1] It was produced alongside the M40 straight-4 engine, as the higher performance engine. It was also used in North American versions of the E36 318i instead of the M40. The M42 was replaced by the M44, which was introduced in 1996.

Compared with the M40, the M42 features a DOHC valvetrain, a timing chain, hydraulic valve lifters and an increased 10:1 compression ratio.[2] Later versions of the M42 also feature a dual length intake manifold (called "DISA").

The M42 was used as the basis for the S42 racing engine, which powered the BMW 320i in the German Super Tourenwagen Cup.

Design[edit]

Following BMW's typical construction techniques at the time, the motor incorporates a cast-iron block and aluminium head. Weight-saving measures include aluminium chain cases, oil sump, motor mount arms, accessory mounts and a cartridge-style oil filter housing. Closely related to the SOHC M40, the M42's DOHC 16 valve head and chain-driven cams provided increased power in comparison to the M40.

The M42 also incorporates 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.

When installed in the BMW E30, a two-piece oil pan with a removable front sump was fitted to the M42. In this two-piece arrangement, 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. This can cause problems, because thermal cycles and engine vibration tend to loosen the six 10mm upper pan mounting bolts inside the motor.[3]

All versions featured a low-maintenance timing chain with a self-adjusting hydraulic chain tensioner and hydraulic valve tappets. The M42 also incorporates the Bosch Motronic M1.7 DME, eliminating a distributor in favor of fully electronic ignition timing.[4] The DME was configured to fire four individual remotely mounted coils. Furthermore, in markets that required emissions controls, the DME also incorporates an upstream O2 sensor and three-way catalyst.

Running changes[edit]

The earliest versions of the M42 developed problems with the camshaft chain drive. The hydraulic tensioner,[5] chain guides, idler wheel and rear lower chain case have all been updated to resolve mechanical wear problems experienced in the early versions of the M42. Since the updated cam chain tensioner is shared with the M44,[6] people commonly refer to the revised tensioner as a "M44 tensioner".[7]

In the final versions of the M42, BMW engineered a dual length intake manifold (called "DISA" by BMW)[2]

Recalls[edit]

Early models of the M42 experienced failures of a profile gasket sealing the lower cam chain case to the underside of the cylinder head.[8] 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. 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.[9]

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.[2] The engine uses Bosch Motronic 1.7 fuel injection. Versions equipped with a catalytic converter 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[10]

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]

  1. ^ a b "Information on M42 engines". www.bmwheaven.com. Retrieved 18 February 2017. 
  2. ^ a b c "BMW E30 specifications". www.e30world.com. Archived from the original on 2013-02-24. 
  3. ^ "Engine failure due to pan gasket shift/bolt loss". www.m42club.com. Archived from the original on 27 November 2010. 
  4. ^ "BMW M42 and M44 Four Cylinder Engines". www.unixnerd.demon.co.uk. Retrieved 18 February 2017. 
  5. ^ "M42 Chain Tensioner Replacement". www.e30zone.net. Retrieved 20 February 2017. 
  6. ^ "11311743187 chain tensioner". www.realoem.com. Retrieved 20 February 2017. 
  7. ^ "318is (M42) Timing chain tensioner". www.bimmerforums.com. Retrieved 20 February 2017. 
  8. ^ "318i M42 Profile Gasket Problem". www.unofficialbmw.com. Retrieved 18 February 2017. 
  9. ^ "BMW M42 318i - Timing Case Profile Gasket". www.timthurber.com. Retrieved 18 February 2017. 
  10. ^ "Engine FAQ". www.bimmerforums.com. 23 August 2009. Retrieved 18 February 2017. 


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