4-cylinder BMW engines

kaishang · 05-20-2011, 01:31 AM

Do they have balance shafts?

creepy coupe · 05-20-2011, 02:23 AM

The 320i doesn't
The 320d does

bodgerx · 05-20-2011, 04:33 AM

The new 4 cyl turbo engines do.

creepy coupe · 05-20-2011, 08:07 AM

Quote:

Originally Posted by bodgerx

The new 4 cyl turbo engines do.

Which engines?

bodgerx · 05-20-2011, 09:16 AM

N20

http://www.bmwblog.com/2011/03/15/in...er-n20-engine/

doughboy · 05-20-2011, 09:28 AM

The majority of 4 cylinder engines have balancer shafts these days in the pursuit of greater refinement.

A inline 4 cylinder is a hideously unbalanced mess naturally and needs all the help it can get.!!!

xenon · 05-20-2011, 09:30 AM

I thought it was still not that common. The N20 engine appears to only have one and that looks a bit lightweight. The two Lanchester shafts in my 944 engine are huge chunks of metal.

creepy coupe · 05-20-2011, 09:39 AM

Quote:

Originally Posted by doughboy

The majority of 4 cylinder engines have balancer shafts these days in the pursuit of greater refinement.

A inline 4 cylinder is a hideously unbalanced mess naturally and needs all the help it can get.!!!

I can't find any 4 pot petrols on Realoem, that have them?

xenon · 05-20-2011, 09:41 AM

Other than the new N20 no existing BMW petrol engines do. I believe it is still uncommon - they were intoduced in the 80s (by Mitsubishi I think) although invented years before, but not many used them with the noticeable exception of Porsche who produced the world's largest four-pot in the 3.0 944S2

creepy coupe · 05-20-2011, 09:45 AM

Bit too new for realoem then?

xenon · 05-20-2011, 09:46 AM

Yes, the N20 isn't in production yet.

creepy coupe · 05-20-2011, 09:50 AM

http://www.realoem.com/bmw/partgrp.d...61&hg=11&fg=05

xenon · 05-20-2011, 09:53 AM

Link doesn't work for me but I assume you found an example.

creepy coupe · 05-20-2011, 10:00 AM

Should work now, although it would look as though BMW's numbering system is even more weird. Z4 X28i is a 4 pot 2.0ltr

xenon · 05-20-2011, 10:06 AM

They're keeping the same names but they'll all be four-pots with six-pot-like outputs.

creepy coupe · 05-20-2011, 10:24 AM

Quote:

Originally Posted by xenon

They're keeping the same names but they'll all be four-pots with six-pot-like outputs.

I thought I read 18# BHP

duke knooby · 05-21-2011, 05:55 PM

i'm pretty sure balancer shafts were first introduced on the 4 cyl engines with the launch of the e46 1.9l way back in '98, wether or not they still use them.. i've no idea

the engine mounts are probably much more advanced now, so they maybe aren't really required apart from in the diesels??

JonnySi · 05-22-2011, 12:20 PM

Quote:

Originally Posted by creepy coupe

The 320i doesn't
The 320d does

Wrong, All BMW 4 cylinders have had balance shafts since the late 80's petrol and then diesels since 98 ish

creepy coupe · 05-23-2011, 01:46 AM

Quote:

Originally Posted by JonnySi

Wrong, All BMW 4 cylinders have had balance shafts since the late 80's petrol and then diesels since 98 ish

So how come it doesn't show as a part, on realoem?

xenon · 05-23-2011, 01:49 AM

I can't find any either. Look at the exploded view of (say) the N42 engine from the e46 - not a balance shaft in sight.

duke knooby · 05-23-2011, 12:08 PM

Quote:

Originally Posted by xenon

I can't find any either. Look at the exploded view of (say) the N42 engine from the e46 - not a balance shaft in sight.

seems to be buried in with the oil pump drive on the n42

http://www.realoem.com/bmw/showparts...90&hg=11&fg=30

JonnySi · 05-23-2011, 12:24 PM

Quote:

Originally Posted by duke knooby

seems to be buried in with the oil pump drive on the n42

http://www.realoem.com/bmw/showparts...90&hg=11&fg=30

It is part of the oil pump drive and cannot be seperated

05-20-2011, 01:31 AM	#1
kaishang Colonel 54 Rep 2,197 Posts Drives: 2010 E90 330d Join Date: Jul 2010 Location: London iTrader: (0)	4-cylinder BMW engines Do they have balance shafts?
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05-20-2011, 02:23 AM	#2
creepy coupe Lieutenant General 1867 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	The 320i doesn't The 320d does
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05-20-2011, 04:33 AM	#3
bodgerx Private 2 Rep 75 Posts Drives: E91 318i Efficient Dynamics Join Date: May 2011 Location: UK iTrader: (0)	The new 4 cyl turbo engines do.
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05-20-2011, 09:16 AM	#5
bodgerx Private 2 Rep 75 Posts Drives: E91 318i Efficient Dynamics Join Date: May 2011 Location: UK iTrader: (0)	N20 http://www.bmwblog.com/2011/03/15/in...er-n20-engine/
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05-20-2011, 09:28 AM	#6
doughboy Major General 1545 Rep 8,970 Posts Drives: 2018 M2 Comp 6MT Join Date: Jan 2009 Location: UK iTrader: (2)	The majority of 4 cylinder engines have balancer shafts these days in the pursuit of greater refinement. A inline 4 cylinder is a hideously unbalanced mess naturally and needs all the help it can get.!!!
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05-20-2011, 09:30 AM	#7
xenon Major General 1397 Rep 8,083 Posts Drives: 2021 G21 330i M-Sport Join Date: Jun 2008 Location: Coventry iTrader: (0)	I thought it was still not that common. The N20 engine appears to only have one and that looks a bit lightweight. The two Lanchester shafts in my 944 engine are huge chunks of metal. __________________ Ian Current: 2021 G21 330i M-Sport Previous: 2018 A6 Avant S-Line MMI+, 2014 F31 320d M-Sport, 2013 F10 520d M-Sport, 2011 F10 530d M-Sport, 2008 320i M-Sport Coupe, 2002 325i, 2001 318i valvetronic, 1998 318i, 1996 525i, 1990 Porsche 944S2
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05-20-2011, 09:41 AM	#9
xenon Major General 1397 Rep 8,083 Posts Drives: 2021 G21 330i M-Sport Join Date: Jun 2008 Location: Coventry iTrader: (0)	Other than the new N20 no existing BMW petrol engines do. I believe it is still uncommon - they were intoduced in the 80s (by Mitsubishi I think) although invented years before, but not many used them with the noticeable exception of Porsche who produced the world's largest four-pot in the 3.0 944S2 __________________ Ian Current: 2021 G21 330i M-Sport Previous: 2018 A6 Avant S-Line MMI+, 2014 F31 320d M-Sport, 2013 F10 520d M-Sport, 2011 F10 530d M-Sport, 2008 320i M-Sport Coupe, 2002 325i, 2001 318i valvetronic, 1998 318i, 1996 525i, 1990 Porsche 944S2
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05-20-2011, 09:45 AM	#10
creepy coupe Lieutenant General 1867 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	Bit too new for realoem then?
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05-20-2011, 09:46 AM	#11
xenon Major General 1397 Rep 8,083 Posts Drives: 2021 G21 330i M-Sport Join Date: Jun 2008 Location: Coventry iTrader: (0)	Yes, the N20 isn't in production yet. __________________ Ian Current: 2021 G21 330i M-Sport Previous: 2018 A6 Avant S-Line MMI+, 2014 F31 320d M-Sport, 2013 F10 520d M-Sport, 2011 F10 530d M-Sport, 2008 320i M-Sport Coupe, 2002 325i, 2001 318i valvetronic, 1998 318i, 1996 525i, 1990 Porsche 944S2
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05-20-2011, 09:50 AM	#12
creepy coupe Lieutenant General 1867 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	http://www.realoem.com/bmw/partgrp.d...61&hg=11&fg=05 Last edited by creepy coupe; 05-20-2011 at 09:58 AM..
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05-20-2011, 09:53 AM	#13
xenon Major General 1397 Rep 8,083 Posts Drives: 2021 G21 330i M-Sport Join Date: Jun 2008 Location: Coventry iTrader: (0)	Link doesn't work for me but I assume you found an example. __________________ Ian Current: 2021 G21 330i M-Sport Previous: 2018 A6 Avant S-Line MMI+, 2014 F31 320d M-Sport, 2013 F10 520d M-Sport, 2011 F10 530d M-Sport, 2008 320i M-Sport Coupe, 2002 325i, 2001 318i valvetronic, 1998 318i, 1996 525i, 1990 Porsche 944S2
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05-20-2011, 10:00 AM	#14
creepy coupe Lieutenant General 1867 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	Should work now, although it would look as though BMW's numbering system is even more weird. Z4 X28i is a 4 pot 2.0ltr
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05-20-2011, 10:06 AM	#15
xenon Major General 1397 Rep 8,083 Posts Drives: 2021 G21 330i M-Sport Join Date: Jun 2008 Location: Coventry iTrader: (0)	They're keeping the same names but they'll all be four-pots with six-pot-like outputs. __________________ Ian Current: 2021 G21 330i M-Sport Previous: 2018 A6 Avant S-Line MMI+, 2014 F31 320d M-Sport, 2013 F10 520d M-Sport, 2011 F10 530d M-Sport, 2008 320i M-Sport Coupe, 2002 325i, 2001 318i valvetronic, 1998 318i, 1996 525i, 1990 Porsche 944S2
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05-21-2011, 05:55 PM	#17
duke knooby New Member 0 Rep 11 Posts Drives: 325d Join Date: May 2011 Location: belfast iTrader: (0)	i'm pretty sure balancer shafts were first introduced on the 4 cyl engines with the launch of the e46 1.9l way back in '98, wether or not they still use them.. i've no idea the engine mounts are probably much more advanced now, so they maybe aren't really required apart from in the diesels?? Last edited by duke knooby; 05-21-2011 at 06:02 PM..
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05-23-2011, 01:49 AM	#20
xenon Major General 1397 Rep 8,083 Posts Drives: 2021 G21 330i M-Sport Join Date: Jun 2008 Location: Coventry iTrader: (0)	I can't find any either. Look at the exploded view of (say) the N42 engine from the e46 - not a balance shaft in sight. __________________ Ian Current: 2021 G21 330i M-Sport Previous: 2018 A6 Avant S-Line MMI+, 2014 F31 320d M-Sport, 2013 F10 520d M-Sport, 2011 F10 530d M-Sport, 2008 320i M-Sport Coupe, 2002 325i, 2001 318i valvetronic, 1998 318i, 1996 525i, 1990 Porsche 944S2
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