Quite true, I don't know the answer, and I wouldn't put my trust in a main dealer.
All I know is the clutch bolts to the DMF which bolts to the engine, and its still the same old alfa engine with a 20valve head.
If anyone knows for sure, it would be great if they post the answer here...
Does the 20v JTD use the same DMF as the 10v?
Don't forget, the clutch sits between the flywheel and gearbox - it has to mate to both of them, not just the flywheel. So if the 10v clutch doesn't mate to the flywheel, we know the flywheel is different. But even if it does mate to the flywheel, will it mate to the gearbox? Probably not, it is a different gearbox after all.
Thanks Jeff, that's interesting. What you list is consistent with the Valeo website, which lists everything up to the 10v 2.4JTD but not the 2.4JTD 20v. That makes me suspicious that it's different. I've also had it confirmed that there's no added value in getting genuine parts, as Valeo are the suppliers to Alfa who merely rebox them. However, I'm now not convinced that Valeo supply the clutch to Alfa for the 2.4 JTD 20 valve.
Maybe Valeo don't make the clutch for the 20v.. If the DMF is different to the one from the 10v, then the clutch kit will be different. Do Valeo make clutches for GM, or does someone else do it?
Does this indicate further that the 20valve block is from GM, whereas the others are not (and also that perhaps the flywheel is not the same either?)?
Anyone dabbled amongst this on the 20 valve 2.4JTD?
No, the block is the same 10v -> 20v, both 2387cc 5-cyl diesels. The 20v just has a different cylinder head, using 2nd gen common rail technology with multiple injections per cycle. Block is the same, but maybe the flywheel is different. We know the driveshafts and gearbox are different, it is possible the entire transmission is different, ie driveshafts, gearbox, clutch and DMF. Or maybe the DMF is the same as the 10v but the clutch kit has to be different due to the differences on the input side of the gearbox?
What I really wonder, is could you use a DMF from a 10v, clutch from a 10v, gearbox from a 16v and driveshafts from a 16v? Should technically be feasible, you might need to use other 10v parts to get the mounts though (subframe?). Then you could use the Q2