M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: Froos on December 30, 2006, 01:49:30 PM

Title: Flywheel euro differences??
Post by: Froos on December 30, 2006, 01:49:30 PM: Hi all,
I took my flywheel home to take it to a shop to shave off a couple of kilo's. Than last night I had a look around our website and the term double mass comes up a lot...Now my flywheel cam out of my stock stock e30 engine (no airco), and i put some pics down to compare (from bmwman91's excellent DIY DIY Complete Suspension Overhaul [LOTS OF STUFF])
Are there diffences in airco vs non airco models??
Mine weighs in at 9,5 kilo's...
First 2 pics are from bmwman91, last pic is mine
Comments please
Title: Flywheel euro differences??
Post by: cecotto on December 30, 2006, 03:40:14 PM: Theres two flywheels for the E30 M42

The Fixed/Solid, Typically this is used together with a sprung hub clutch plate.

The dual-mass, This features some built-in damping/spring. And usually this is used together with a fixed hub clutchplate. Like its shown on the image.

If yours weighs in at ~9.5kg it sounds the the fixed unit. BMW rates this as
9.9kg. And the dual-mass is rated as 12.25kg.
Title: Flywheel euro differences??
Post by: Froos on December 30, 2006, 04:24:15 PM: Hi Steffen, ok 9.9 it prob is,
Can i assume the dual mass makes a more comfi ride? What would be the differences in clutch hub caracteristics while driving?
What do you reacon is more sportive? Ihope to shave off about 1~2 kilos
Title: Flywheel euro differences??
Post by: cecotto on December 30, 2006, 04:45:09 PM: A long time ago i read BMWs explanation about the advantages on the dual mass. But i cant remember exactly what their reasoning is. But they write that it prevents vibrations from the engine transfering to the rest of the driveline. Also the lighter clutchdisc should improve shifting characteristics. As its got less inertia.

But their reasoning might be better targeted on the masses, and not at us who value the sporty edge.

If i were you i would throw in a JB-Racing alluminum flywheel. They're a really a nice product. I visited them just before christmas and was given a guided tour through the machineshop. They got some amazing machinery to manufacture the flywhels on. And have been making them for around 20 years.
Title: Flywheel euro differences??
Post by: romkasponka on December 31, 2006, 01:01:14 AM: I have an idea! Is it posible to grind flywheel to fit 325 clutch?
Title: Flywheel euro differences??
Post by: Vladi on December 31, 2006, 06:21:16 AM: The pressure plate and clutch disk of the 325 have a diameter of 228mm.
The pressure plate and clutch disk of the 318iS have a diameter of 215mm.
I've got the M20 flywheel and 325 clutch.
http://www.m42club.com/forums/attachment.php?attachmentid=323&stc=1&thumb=1&d=1155155878 (http://www.m42club.com/forums/attachment.php?attachmentid=323&stc=1&thumb=1&d=1155155878)

http://www.m42club.com/forums/attachment.php?attachmentid=325&stc=1&thumb=1&d=1155156167 (http://www.m42club.com/forums/attachment.php?attachmentid=325&stc=1&thumb=1&d=1155156167)
Title: Flywheel euro differences??
Post by: romkasponka on December 31, 2006, 06:33:09 AM: there is enough place to fit bigger clutch. Don't you think so?

Does the flywheels from all M20 motors fit for M42?
Title: Flywheel euro differences??
Post by: dude8383 on December 31, 2006, 11:56:59 AM: Quote from: romkasponka;16533
there is enough place to fit bigger clutch. Don't you think so?

Does the flywheels from all M20 motors fit for M42?

the single-mass unit does fit...but its not a plug and play thing.
Title: Flywheel euro differences??
Post by: Vladi on December 31, 2006, 06:05:04 PM: Actually it IS plug and play if you get the right flywheel. ;)
I just took out the original M42 flywheel and stuck in the one in the photo.
No, not all the flywheels used on M20's fit the M42. The M20 flywheel has to be like the one in my photo.
Title: Flywheel euro differences??
Post by: dude8383 on December 31, 2006, 06:35:16 PM: Quote from: Vladi;16557
Actually it IS plug and play if you get the right flywheel. ;)
I just took out the original M42 flywheel and stuck in the one in the photo.
No, not all the flywheels used on M20's fit the M42. The M20 flywheel has to be like the one in my photo.

yes the single mass unit...the ETA m20's had a dual mass flywheel. its not a simple plug and play because you need the 323i Throw out bearing and you need to swap ring gear for the starter.

i'd like to see what you mean by plug and play.
Title: Flywheel euro differences??
Post by: Froos on December 31, 2006, 06:49:28 PM: I guess ill go over to the bmwdealer to get oa part no on my flywheel, will post pics when i get it back from the shop
Title: Flywheel euro differences??
Post by: Vladi on December 31, 2006, 08:35:31 PM: Quote from: dude8383;16559
yes the single mass unit...the ETA m20's had a dual mass flywheel. its not a simple plug and play because you need the 323i Throw out bearing and you need to swap ring gear for the starter.

i'd like to see what you mean by plug and play.

Dude, before i installed my E36 M42 i had a 316i M40 engine. I installed the M42 engine with the M40 gearbox and the M40 TOB + M20 flywheel and clutch (disk and plate). I just removed the M42 dualmass flywheel and bolted in the singlemass M20 one without any spacers and stuff. It works like a charm.:cool:
Title: Flywheel euro differences??
Post by: romkasponka on January 01, 2007, 07:05:12 AM: Quote from: Vladi;16564
Dude, before i installed my E36 M42 i had a 316i M40 engine. I installed the M42 engine with the M40 gearbox and the M40 TOB + M20 flywheel and clutch (disk and plate). I just removed the M42 dualmass flywheel and bolted in the singlemass M20 one without any spacers and stuff. It works like a charm.:cool:

what about starter motor?
Title: Flywheel euro differences??
Post by: Vladi on January 01, 2007, 07:48:12 AM: Oh yeah, my bad. I bought a new M20 pinion and replaced it in my M40 starter.
My M20 flywheel came off a 320i so i bought a a 320i pinion.
Title: Flywheel euro differences??
Post by: jajou318 on January 01, 2007, 10:14:29 AM: http://bmw.e30tuner.com/my318is_mod_1.php#i

Scroll all the way down, it's the one before last.
Title: Flywheel euro differences??
Post by: Vladi on January 01, 2007, 03:11:14 PM: I still don't understant what's the deal with TOB. I used my M40 one and it works perfect. And like i said before, if you used the right flywheel (like in my photo) you don't have to use any spacers.
For this type of flywheel you'd need the spacer. http://www.m42club.com/forums/attachment.php?attachmentid=324&stc=1&thumb=1&d=1155156130 (http://www.m42club.com/forums/attachment.php?attachmentid=324&stc=1&thumb=1&d=1155156130)
Title: Flywheel euro differences??
Post by: dude8383 on January 01, 2007, 04:52:00 PM: Quote from: Vladi;16594
I still don't understant what's the deal with TOB. I used my M40 one and it works perfect. And like i said before, if you used the right flywheel (like in my photo) you don't have to use any spacers.
For this type of flywheel you'd need the spacer. http://www.m42club.com/forums/attachment.php?attachmentid=324&stc=1&thumb=1&d=1155156130 (http://www.m42club.com/forums/attachment.php?attachmentid=324&stc=1&thumb=1&d=1155156130)

the deal is, we don't have access to m40 parts state-side. we have to deal with using the 323i TOB.
Title: Flywheel euro differences??
Post by: romkasponka on January 01, 2007, 05:31:45 PM: Quote from: Vladi;16594
I still don't understant what's the deal with TOB. I used my M40 one and it works perfect. And like i said before, if you used the right flywheel (like in my photo) you don't have to use any spacers.
For this type of flywheel you'd need the spacer. http://www.m42club.com/forums/attachment.php?attachmentid=324&stc=1&thumb=1&d=1155156130 (http://www.m42club.com/forums/attachment.php?attachmentid=324&stc=1&thumb=1&d=1155156130)

Can you give me part number, or point out difference in dimension? Do you have more detailed photos?
Title: Flywheel euro differences??
Post by: Vladi on January 01, 2007, 07:59:01 PM: This flywheel went straight in. Note it didn't hit the oilpan. So if you want a plug and play flywheel swap search for one like in the first photo.
(http://www.m42club.com/forums/attachment.php?attachmentid=323&stc=1&thumb=1&d=1155155878)

This flywheel hit the oilpan.
Title: Flywheel euro differences??
Post by: denious on January 01, 2007, 08:42:05 PM: So which model and what year is the PnP from? Everyone seems to get a different one from rather same cars... Also, yours must also weight less than the second one you showed?

It would be great if you could make a detailed list (or even a DIY with instructions and all) of everything you needed to make the swap work! :)
Title: Flywheel euro differences??
Post by: JOEBMW on January 02, 2007, 08:32:09 PM: Can anyone clear this up??

i currently have my m42 apart and was wondering what flywheel combo i should use.
Title: Flywheel euro differences??
Post by: Vladi on January 02, 2007, 09:00:17 PM: It's quite simple. Search for an M20 wich has this flywheel and when you find it, take the starter from that engine, too.And of course you'd also need an M20 clutch (disk,plate,TOB).http://www.m42club.com/forums/attachment.php?attachmentid=323&stc=1&thumb=1&d=1155155878 (http://www.m42club.com/forums/attachment.php?attachmentid=323&stc=1&thumb=1&d=1155155878)