Symptoms of a worn/broken DMF? - Alfa Romeo Forum
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(Post Link) post #1 of 30 Old 21-08-09 Thread Starter
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Hmmm Symptoms of a worn/broken DMF?

I have nasty feeling about the DMF on my car..

Could anyone explain the symptoms of a knackered one?

Cheers.
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too many abbreviations or acronyms on this site. what are you talking about?
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too many abbreviations or acronyms on this site. what are you talking about?
dual mass flywheel
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POS (Pile of S*ite) would be more accurate.
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POS (Pile of S*ite) would be more accurate.
could always replace it with a normal one and bring some drive train vibration back, but simpler, and cheaper to repair
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I could be wrong (usually am) but I thought that only the oil burners had DMFs (to reduce vibration through to the clutch) ... but what sorts of sounds is it making???
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I could be wrong (usually am) but I thought that only the oil burners had DMFs (to reduce vibration through to the clutch) ... but what sorts of sounds is it making???
hmm could be right there

aint it usually squeeks and clunks when accelerating, lifting off, the accelerating again rapidly??
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hmm could be right there

aint it usually squeeks and clunks when accelerating, lifting off, the accelerating again rapidly??
I think that my DMF has had better days ... I get this warbling sort of sound when I lift off with the engine about about 2k ... bit it's been like that since I had the car so I'm not in any hurry to get it fixed ...
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(Post Link) post #9 of 30 Old 22-08-09 Thread Starter
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I could be wrong (usually am) but I thought that only the oil burners had DMFs (to reduce vibration through to the clutch) ... but what sorts of sounds is it making???
The 3 litre V6 does have a DMF for some reason, but the 2.5 and 3.2 don't.

It isn't making any noise as such, but I get a lumpy tickover that isn't a missfire, gears which are awkward to select when the car is stationary (especially when cold) and there is a noise that sounds like the starter is sticking slightly when starting the car.
The starter sticking noise only happens when the engine is cold.

The annoying this is the car has recently had a new clutch and the garage said the DMF was ok. (Although they were paying for the clutch as they did the job before selling me the car)

My DMF may be ok, but I would still much rather that it didn't have one.

Giulietta 2.0JTDm (170)
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what about a loose gearbox or engine mounting??

a lumpy tickover wouldnt be the dmf, unless it vibrations your on about, not rising and falling revs

my starter sticks, think they all do, on purpose, not stick, but the noise, my punto's and my stilo, my 147 and 156 have all and are still doing it. something with the starter that keeps it spinning for a second after the engine has fired.
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(Post Link) post #11 of 30 Old 22-08-09 Thread Starter
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Yeah the tickover lumpyness is more of a vibration.

I was concerened that it might be ignition related, so I changed the plugs and camcover gaskets, removed all of the oil from the plug wells and it is the same.

It is as if something is not quite in balance, but at anything over idle speeds it is fine.


The bit that really annoys me though is the gear selection problem.

There is no crunching, and the clutch isn't dragging, but it can be a real effort to get the car into gear when stationary.

The linkeage looks ok and gearchanges whilst moving are fine.
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Yeah the tickover lumpyness is more of a vibration.

I was concerened that it might be ignition related, so I changed the plugs and camcover gaskets, removed all of the oil from the plug wells and it is the same.

It is as if something is not quite in balance, but at anything over idle speeds it is fine.


The bit that really annoys me though is the gear selection problem.

There is no crunching, and the clutch isn't dragging, but it can be a real effort to get the car into gear when stationary.

The linkeage looks ok and gearchanges whilst moving are fine.
gear box mount? its something else too look at
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(Post Link) post #13 of 30 Old 22-08-09 Thread Starter
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I'll check it out.

Cheers mate.
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symon, how is your engine top mount ? The dog leg thingy .
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symon, how is your engine top mount ? The dog leg thingy .
That one looks fine to be honest.
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I'll check it out.

Cheers mate.
now dont laugh, but when i had horrible grinding noises, and vibrations and stiff gear changes, on my punto, i took into fiat, on the promiss of a new gearbox (wishful thinking).

they had a look, and what they reported back to me astounded me. my rubber band had broke

you what!!??

on the gear box, there is a rubberband, quite a big one, that absorbs the vibrations, give the gearbox a little bit of movement, to move with the engine, ease stress.

but no word of a lie, they called it a rubber band so no gear box, replaced the "rubber band" and off i went

see the punto is a propper rubber band car. but i think after this, all cars have them, just never heard it called that before

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(Post Link) post #17 of 30 Old 22-08-09 Thread Starter
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Our Bravo has pretty much the same box as a punto and recently I took it off to change the clutch.

I couldn'y find anything that looked like a rubber band, but there is a couple of rubber block type mounts, one under the engine and one on the end of the gearbox at the front.

They do look pretty damed flimsy though.

I will have to get and have a look at the GTV as soon as I get chance.
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Our Bravo has pretty much the same box as a punto and recently I took it off to change the clutch.

I couldn'y find anything that looked like a rubber band, but there is a couple of rubber block type mounts, one under the engine and one on the end of the gearbox at the front.

They do look pretty damed flimsy though.

I will have to get and have a look at the GTV as soon as I get chance.
thats the ones, i didnt see them, but thats what they said they were, like exhaust mountings
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I have to take the Bravo box off again in the next week or two as the diff ring gear (shrink fit ) is slipping.

I can take a picture if you like.
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I have to take the Bravo box off again in the next week or two as the diff ring gear (shrink fit ) is slipping.

I can take a picture if you like.
yeah go on then, would like to know what this "rubber band" looks like.

my box was swinging from side to side, made it sound like it had straight cut gears, but it wasnt right so needed sorting
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That doesn't sound good.

I normally take a few snaps whilst doing important work on cars. If anything it helps prove the work was done when you sell it, as you don't get a receipt doing work yourself.
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Can I ask if anyone has ever fitted a solid Flywheel in place of a DMF & if so how did it turn out ? I am talking about JTD car's , sorry if I hijacked it a bit Symon ,I'm about to fit an upgraded clutch & I too think I will need a new Flywheel but @£400 I'm looking at every option !

Good luck with yours, Oh I have contacted MarkJTD & he has kindly given me a telephone number & address of a place that may still do re-con DMF's for a JTD @ about a 3rd of the price!If you would like this Pm me & I will send it to you or I will post it here as long as Mark does not mind.
 
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Can I ask if anyone has ever fitted a solid Flywheel in place of a DMF & if so how did it turn out ? I am talking about JTD car's , sorry if I hijacked it a bit Symon ,I'm about to fit an upgraded clutch & I too think I will need a new Flywheel but @£400 I'm looking at every option !

Good luck with yours, Oh I have contacted MarkJTD & he has kindly given me a telephone number & address of a place that may still do re-con DMF's for a JTD @ about a 3rd of the price!If you would like this Pm me & I will send it to you or I will post it here as long as Mark does not mind.
you can, seen it done, the only difference is use loose a bit of refinement in the transmission. just transmits the vibrations more, ala old diesel, like my mums focus. you can feel the vibrations through the gear stick and pedals more

i could live with that though as its like half the price
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Where do you get a SMF for the diesel engines from though? I only know of GSRacing.it and they charge something like 800 Euros for SMF & clutch kit for a 1.9 JTD 16v.
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heres one for 8v or 10v
Allitalia Ltd - Fiat - Alfa - Lancia*::*Performance Parts*::*Clutch And Flywheel Kit
as yet im upto 250 miles bedding mine in and so far all ive noticed is it doesnt like low speed high gear as much as before(which is probably best)and seems to lose momentum quicker(should do as lighter)less noise than i was expecting with clutch in(was expecting a lot of rattle), does feel slightly less refined in gear but still less difference than i was expecting.

Last edited by sussexa; 23-08-09 at 16:16.
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