Single Mass Flywheel--

[OrganicMechanic]

what are the options?

Is the diameter of the 6 speed flywheel the same as the 5 speed?

will this work?

http://www.clutchnet.com/search.php?mode=search

the link doesnt work right---e39 alu flywheel.

[Jonsku]

M60, M62 and S62 flywheels are all the same, though M62 / S62 has the trigger wheel on the flywheel whereas M60 has the trigger on the vibration damper.
Clutch diameters differ (M60B40 has 265mm clutch, others have 240mm) and 5-speed and 6-speed gearboxes have different diameter clutch shaft.

To put it in clear words, you can fit S62 flywheel to M60 but the clutch disc needs to be for M60B30 or M62B35 if used with 5-speed gearbox.

[OrganicMechanic]

the input shaft is a non-issue, it can be dealt with the clutch disk. The reason I ask about diameter is for the single mass flywheel.

[2002maniac]

From my research, yes, the E39 flywheel will work on the M60, but you must use the smaller diameter clutch and PP from the E39.

[OrganicMechanic]

go to my link in first post and search to e39 m5 single mass flywheel--I think this is a winner

I used to order beefy clutches from these guys when I had a record holding DSM.

[2002maniac]

The clutchnet M5 flywheel is much cheaper than anything else on the market too. I'm considering this option for my E34 as the clutch is beginning to slip on hard 1-2 shifts. I think with an upgraded aftermarket PP the smaller disk diameter will be a non-issue.

[HellzMindPlaya]

So from looking at Clutchnets website i would again guess that the e39 M5 flywheel should work but then comes the next set of questions... I will probably call them tomorrow for an answer. Keep in mind I plan on using a 5 speed gearbox.

e39 M5 Flywheel - Good

e34 530i (m60b30) Clutch Disk??? they don't say they sell that one...
e36 M3 (s52) Clutch Disk??? Searching shows it would work based on O/D size and inside spline size...

e39 M5 Pressure Plate??? You would think it should work... P/N: 15038SXY... Or can I use
e36 M3 Pressure Plate??? Correct Clutch O/D Size... P/N: 15038MXY... $140 cheaper... What does the difference in part number mean?

[OrganicMechanic]

Last time I called looking for a crazy spline to disk the had the info pretty quick. I used these guys in the past, I am hoping that it is the same people, and not gone under from shitty economy. Let me know how your call goes, I am months away from installing the clutch.

ps--running the 5-speed as well.

[HellzMindPlaya]

Well I talked to a guy there and he said that I should be able to use the M3 pressure plate on the M5 flywheel as I couldn't use the M5 pressure plate because it was self adjusting and so I can't just put whatever clutch disk I want in it.

So it sounds like
- e39 M5 Flywheel
- e36 M3 Clutch Disk
- e36 M3 Pressure Plate

I asked about his return policy and he said that if I got everything and it all didn't bolt together for some reason and I didn't damage it and that I should be able to return it.

I am still a long way out on installing the clutch / flywheel / pressure plate too, I just want to be sure I know a round about number as to how deep I am going to get building this monster. I am not even sure the engine is any good at this point. I pulled it out of a junkyard e32(?... 94 740i) and it is a Nikasil block... I may have a lead on a second, known good, engine though.

[OrganicMechanic]

looks as though we just found a good cheap lightweight flywheel combo for the cheap.

[2002maniac]

Good info!

[BruceBe]

This combination will not work. The locating dowels for the PP are closer to the centerline of the flywheel on the M60 than on the e36 S52US. I verified this with both units on a bench, after being told of the incompatibility by the nice folks at JB Racing.

I am in the middle of a swap right now on a dedicated track car, so I will update the group when a solution is identified.

-Bruce

[OrganicMechanic]

nothing a little brideport work cant solve.

[BruceBe]

Maybe - re-centering for new dowels and maintaining zero balance isn't a no-brainer. JB Racing also indicated that the step-depth is different between the two setups (e39 vs. e36-m3). I did not measure for that, however.

-Bruce

[OrganicMechanic]

if you have the crank balanced with the clutch and PP mounted to the adapted flywheel, you would be fine--Any performance machine shop should be able to handle it--