Flywheel ID and which clutch?

[Alburglar]

Can anyone confirm that this is a single mass flywheel?


I had always assumed that it was because it came off my m40! And the only reason I question it is that the flywheel attached to my new M42 engine is identical.

Assuming it is single mass, I should buy a clutch kit for an M40, right?
But what clutch do you buy for an m42 with a OE single mass flywheel. M40?

[Jos]

Dammit I didn't take a pic of my M42 with dualmass on it..

What did the engine come from? My understanding was that only the e36 M42 with aircon/climate had the dualmass. If it's an e36 engine make sure to check the spigot bearing size!

Clutch should be the same for both M40 and M42, I used the M40 one on my M42 after swapping the flywheel over.

[Alburglar]

Ok that's good. I can get my clutch bought now.
It's e30 m42

[rix313]

Looks like a single to me. Taking the clutch off will soon tell you.

[Alburglar]

Yeah it is a single. Got the clutch off today and fitted a new m40 one. Ta

[razler]

Hmm that's the same as my m42 flywheel, I always thought it was a duel mass as it looks twice the weight of a normal flywheel!
What makes a duel mass flywheel a duel mass??

[Jos]

dualmass has a sprung centreweight:

http://c4owners.org/plugins/faq/faq.php?0.cat.10.139