Duel Mass Flywheel

[wasp]

Hi PPL... i hope this will be useful info ..
My duel mass flywheel (DMF) fell apart again (70k lifespan this time) a common problem on pugs and very expensive.
I contacted veleo who make the pugeot clutches and told them what my views were on their DMF'S and the guy in tech there said he agreed!!!
He ASKED ME FOR THE CAR TYPE( 406 HDI) and gave me part no's for a kit to convert it to a solid flywheel conventional clutch (4 part kit)
I then went to my local pug dealer and asked them to get me this kit but they refused "we are not allowed to supply or fit these...head office m8!).LOL at 600 quid pls each time its a good little earner for them !
so i go to partco , they order the parts for me ,geniune veleo@£205 incl vat (cheaper than the dmf bits of scrap!)
Clutch fitted .. perfect no more worries!!! i now have a solid flywheel that doesnt self distruct..just like my previous pug 1.9td 406.. why the did they change to the dmf rubbish????
veleo also make solid flywheel conversion kits for VW ,AUDI, FORD ..
HOPE THIS HELPS.
wasp

[DaiRees]

Hiya Wasp, that's good news . I think the guys on here alreay knew about the solid flywheel conversion, but could you do us a favour and post the Valeo part numbers for the conversion kit? Might help some fellow victims in the future

Cheers

[jameslxdt]

i bought this kit too, but had an uprated clutch instead on my old HDi, it transformed the car, the only thing i noticed was it judderd slightly when the car was really loaded up

[steve_earwig]

*Worries about what the postage would come to...*

[largeuk]

sorry i this is me being thick but do all the 406 hdi's have the DMF if not how do i tell if mine has or not

[teamster1975]

It's only the 110 Hdi's that have the DMF according to previous posts.

[largeuk]

well thats me ok then

[Captain Jack]

And the 136's.

My Honda Accord also has a DMF but these seem to be more reliable than the are on Pugs and Fords. But I can't tell the difference in gear change smoothness...

[Welly]

But I can't tell the difference in gear change smoothness...

You would if someone swapped it for a solid one

The trouble with Diesel engines is that the power down stroke of the piston is so fierce it creates a kind of uneven rotary motion at the fly. The dampened flywheel "absorbs" this motion on take up of the clutch/drive.

It's just another expensive thing added to Diesel's over the years

[Captain Jack]

But my 2.1TD had a solid flywheel and that felt no worse than the Accord. And the Coupe HDi's I test drove felt nothing special in gear changing respect. Ah, I dunno...

[Longintooth]

Hi all
Welton is absolutely right, the DMF on the HDI 110 is an absolute necessary evilly expensive must on these small lightweight but very powerful engines. The whip created is enough to fracture the crank if the clutch is misused at all with a conventional flywheel and the small damper springs on a conventional plate will be knackered in no time at all . Further, torsional oscillations increase vibration quite a lot and will damage the gear train. The whole unit is very finely tuned and also needs the front damper too. I have said before that the whole car from mechanical to electrical is a throwaway after a finite time - 8 years 100,000 miles seems to be when everything starts to go - but what a great car when it's going well.

[MDB929]

I have said before that the whole car from mechanical to electrical is a throwaway after a finite time - 8 years 100,000 miles seems to be when everything starts to go - but what a great car when it's going well.

OUCH!!! Sorry to drag up an old thread (I was searching for DMF) but is it really THAT bad?

I've just replaced my Alfa 156 2.0 with a '99 HDi 110 estate, and a nice car it is too. This means that we now own two 406 estates, as our other is a '97 2.1td Exec, which has been and still is an utterly superb car - just clicked over 162k and it's still a total pleasure to drive. I decided to get another, but this time went HDi as I want the best fuel economy possible.

Reading on here it becomes apparent that the DMF is a bugbear, along with a couple of other things like the multiplexed wiring and fuel pumps..? But this is the first instance I've found of someone saying that the D9 has basically had it after what in modern terms is a pretty short service life.

The car I've just bought has recently had a clutch change, but I don't know if the DMF was done at the same time. If it wasn't, am I sitting on a time bomb?

[mbell666]

If it wasn't, am I sitting on a time bomb?

Not for the DMF, generally if they fail they don't cause more that some noise, judder clutch and bit of clutch slip.

The DMF is basically two plates of metal, one side into the other and is spring loaded (some kind of rubber) to the other. But they have some taps that limit the movement (relative) rotation of the two pieces, when the rubber fails (quite common) then the limiters should mean you still get drive. (This what happened to mine, could rotate one plate in the other with your little finger!).

Generally the limiters seem to hold up pretty well and reports of loss of drive on the 406 due DMF are pretty rare.

[MDB929]

Well that sounds like good news. My recent purchase has an issue that I can't find on this board: at about 1600, and then 1800rpm there is a bit of vibration as you accelerate. It isn't paticularly loud although you can hear and feel it, but there is no clutch slip or judder, and the car seems to move forward exactly as it should (my Lord though, these here HDi's are blessedly slow in comparison to my 2.1 - but I suppose I'll put up with it in the name of economy) - is this "something they all do"? It seems strangely agricultural in the lower rev range when compared to the older engine, which is frankly bizarre.

[steve_earwig]

And there was I thinking the oppostie - I'm back driving my 2.1 after a long time driving my HDi (stupidly expensive registration costs), yes it's got lots more grunt once it gets going but low down below 2k it's got almost nothing Not sure about the vibration, mine does it a bit when it's cold but only low down. I did think it was the DMF letting its presence known but then I had the compressions checked