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Discussion Starter #1
Can anyone advise on which flywheel is fitted to my 2004 156 Sportwagon 2.4 JTD 20v? I have a 2005 version of EPER, and some anecdotal evidence, but nothing concrete yet, as the diagrams in EPER aren't accurate enough to be sure.

I suspect that while the 1.9 JTD and the 10v 2.4 have the dual mass flywheel, it seems plausible that the 2.4 20valve is a solid flywheel.

I'm in the middle of some debate about some clatter (maybe just dielsel knock), clunky gear change (maybe clutch, maybe dmf) and intermittent judder on power (classic dmf symptom, but also other possible causes, such as inner drive shafts). Number one proposal, although expensive, seems to be to replace the DMF and clutch. However, if I can prove conclusively that it doesn't have a dual mass flywheel, then that ain't the cause!

Anyone changed the clutch and flywheel on a 20v 2004 2.4JTD?
Cheers
Iain
 

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I haven't changed one but I am pretty sure the 20V has the DMF, where as the earliest 10V's didn't.
 

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Early ten valves were DMF as well.. So is the 3.0 V6 in the GTV V6 and 166
 

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Thanks Pud for correcting me, I knew the 3 litre 6 speed petrols were, but I wasn't sure about the Diesels. :)
 

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I am not sure if it could be done but it may be worth investigating whether a 20V fiat 5 cylinder petrol engine flywheel would fit as a replacement along with a different clutch.

Has anyone done this?

If it could be done it would be cheapoer than a new DMF
 

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What gearbox does the 20v fiat petrol engine use? If it doesn't use the same vauxhall F40 gearbox the 156 20v JTD uses then I doubt the flywheel and clutch from it will work, as the part of the clutch that attaches to the input shaft on the gearbox will not be right, will it?
 

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I am pretty sure the 20Vt fiat doesn't use the F40 vauxhall box.

I didn't know the 20V diesel used the Vauxhall box. Oh dear.
 

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That was the start of the slippery slope to using GM engine blocks. :tut:
 

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Discussion Starter #11
ok, chaps, I'm still not definite about whether the 20v 2.4 JTD has a dual mass flywheel or not. The reason I doubt the "pretty sure" quotes above at all is that the Alfa EPER system shows a very simple looking digram of the flywheel for the 20valve unlike the one that it shows for the other variants of the diesel block. This is consistent with what I hear from one alfa specialist who is suspicious that it's a solid flywheel, but is having trouble confirming this. Has anyone a definite from direct experience?
 

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If you have the EPR, what's the price of the flywheel? £70 would mean it is solid, but £170 or so would suggest it is a DMF.
 

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If you have the EPR, what's the price of the flywheel? £70 would mean it is solid, but £170 or so would suggest it is a DMF.
I'm guessing you haven't looked at flywheel prices for a while...!

Solid flywheels are around £200 (156 TS price)
DMF flywheels are around £400-£600 ... :wow:
 

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I'm guessing you haven't looked at flywheel prices for a while...!

Solid flywheels are around £200 (156 TS price)
DMF flywheels are around £400-£600 ... :wow:
:wow: I guess not:eek: :eek:
 

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It's a DMF. I bought one to see!!! :rolleyes: I've still got it sat in my cupboard as it turned out to be my driveshaft not DMF.

I'd check the driveshaft boots firstly for any splits etc, no grease/water in driveshafts is the same symptons as a DMF going wrong.

Cheers,

Mark
 

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Driveshaft for me too. It's in the garage being re-conditioned at the moment. I too thought it could be the DMF, but when I bought the car I saw receipts for previous drive shaft work so hoped that's what it would be.

The boot had split, the grease had gone and that was that. Felt like the wheels were going to fall off on the motorway. :eek:
 

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Discussion Starter #20
I considered all the warnings from people on this forum about drive shafts but after talking to a few specialists, and notably, my local one, he persuaded me that the DMF was prime contender. I asked him to check the driveshafts while doing the DMF work, and he told me aftewards that they seemed ok. He showed me the old DMF after it was removed, declared it was very loose and was convinced it was the problem. Two weeks later, after a 600 mile round trip where the car felt like it was going to shake to pieces on the M6, it now seems evident it wasn't the DMF, and I strongly suspect the driveshafts are the problem. I'm a grand lighter in pocket and not impressed. Is there any comeback for me to argue that they've done the wrong job?
 
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