Hi,

Around peak torque and at full throttle I have a deep rumbling sort of noise that lasts a second or so.

I thought it was the flywheel but that's now been changed and not fixed it.

Could it be a dodgy turbo? Or any other suggestions?

Thanks

Cheap tyres ?

Engine mounts ?

Cheap tyres ?

Engine mounts ?

LMAO - yeah it's these dodgy tyres playing up

Engine mounts, hmmm - how do you check them? Would you expect them to be worn at 50k?

LMAO - yeah it's these dodgy tyres playing up

Engine mounts, hmmm - how do you check them? Would you expect them to be worn at 50k?

haha

Worth a check, just make sure handbrake is full on and go to pull off in first just enough to make the engine move/rock while somebody looks under bonnet. I'm only on 48 k and pretty sure the dog bone bush underneath is just about shot.

The dogbone is brand new.

Am I just looking for a load of engine movement then I guess?

I'll try that tomorrow and if it seems to move a lot I will film it and post for opinions.

CV joint, although i would not expect that to only last one second.

A failing turbo usually makes more of a shrieking/wailing noise - not a rumble.

Also, could be the flywheel - do you feel any vibrations through the clutch pedal at any times?

There can be a slight vibration taking up drive but only when your riding it a bit and its not all the time. I'm putting that down to its only done 150 ish miles on it.

The clutch/flyhweel is brand new though and was done at the dealer so all proper Skoda parts.

What are you classing as "peak torque"? Can you be specific about what revs?

What are you classing as "peak torque"? Can you be specific about what revs?

It starts about 1850 and lasts till about 2100.

Hmm, definitely flywheel territory. Assume if you take it to 3000 gently, then floor it, there is no rumble?

Hmm, definitely flywheel territory. Assume if you take it to 3000 gently, then floor it, there is no rumble?

If I floor it any time after about 2400 its perfect.

Wouldn't this brand new flywheel doing exactly the same thing be a bit too much of a coincidence?

Don't want to worry you mate, but that's exactly

the rev range that my dmf was making noise before I changed it.

Are you certain they didn't just change the clutch

especially if it was under warranty?

Did you see the old one?

Although you're probably aware of this already I've got to

mention it.

I hope you're not going flat out on the throttle at 1850

as this will knacker the flywheel very quickly.

You should refrain from wide open throttle under 2000rpm

especially in higher gears.

I wouldn't normally make a habit of flooring it that low in the revs but am doing it now as I knew there was an issue there.

I didnt see the old flywheel but have a receipt thing showing it was changed.

I doubt they just left it, as it's in the Skoda dealers interests to swap it (they pass the cost on afterall).

You shouldnt be booting it that low down anyways

Seems like your just trying to kill your new flywheel

I suggest you start driving it properly

You shouldnt be booting it that low down anyways

Seems like your just trying to kill your new flywheel

I suggest you start driving it properly

I'm sorry, but shut up you complete idiot.

The car is standard and designed as a package, there is no reason you shouldn't be able to floor it at any revs. Does it say in the handbook to only go WOT after X revs?

We all know best practice is not to do it at low revs; but that's not the point here and your comments are not only irrelivent, but wrong.

It doesn't say that in the handbook, no. But then some handbooks also say that biodiesel is OK (it isn't), and various other "omissions". It's a guide, and has been proven incorrect on occasions since it's printed and doesn't change (and presumably yours is an old copy). It's now known that that style of driving can kill DMFs as they're not really designed for it, even on standard cars. Jase was just pointing it out (although could have been a bit more diplomatic maybe ). Why do you think so many Skoda taxis go in for SMF conversions? Does the handbook say "this vehicle should not be used as a taxi without an SMF conversion"? Of course not, but that information has revealed itself since the handbook was printed, and people share that so that they can help other people out with reliability problems.

You already know what "best practise" is, and yet you seem hellbent on not following it. You know the rumble is there, it's been there on your old flywheel and your new flywheel, it's just a characteristic of DMFs IMO. What next, you're going to kill another one, buy another new one, and then start driving that one in a way that you know isn't "best practise" so that you can start a thread about that one as well?

I'm sorry, but shut up you complete idiot.

The car is standard and designed as a package, there is no reason you shouldn't be able to floor it at any revs. Does it say in the handbook to only go WOT after X revs?

We all know best practice is not to do it at low revs; but that's not the point here and your comments are not only irrelivent, but wrong.

Yes i am a complete idiot....

The dmf is a weak point

Iv put 3 smf's in pd130's and blew 2 dmf's

Low rpm and wot just isnt sensible on a stock dmf

And i try help ppl.... Dont know why i bother

I think what Jason said may well be pretty much on the money here, as much as you may not like it (or maybe just the way he said it - either way).

Simple answer is I would say it's quite normal, and just don't do it.

Parents PD100 and my own hybrid vRS will make a booming rumble if trying to floor it in any gear higher than second from such low revs. It'll be the flywheel, and it's doing it no good at all.

Try 267bhp going through a helix and smf at 1800rpm

Its class!!

I agree with the above postings regarding WOT and low revs. The Dmf just isnt suited to those kind of torque figures from low down the revs. My car used to do exactly the same and still does but i choose to only floor it after 2100 revs.

if it is the above then avoid the rev range at all costs. i had a brand new dual mass fitted when i bought mine, had it remapped and i destroyed the dmf in under 10k. totally my fault was addicted to the torque pull low down in sixth on the motorway

one very expensive lesson learnt

needless to say that rev range is now avoided where ever possible

Dont get me wrong, I agree best practice is to avoid that rev range. When remapped then totally avoid it.

However as standard there is no reason that DMF should not be able to withstand any amount of low rev action.

In this case the DMF is brand new, puitting my foot down at low revs a couple of times to test and see if the issue is resolved is in no way shape or form a problem.

We can rule out low revs broke the flywheel in a one off foot down.

And thats the point, this is something else not related to how the car is driven.

There is a reason it can't withstand it, they're not designed for it. The DMF is (in my opinion) a tradeoff to provide comfort to the people who buy these cars and don't want to thrash them all the time. Admittedly, I bought my Fabia because it's quick, so I've now fitted an SMF because the tradeoff of a little bit of idle chatter means that I can drive it pretty much how I like (probably including accelerating in 6th once the clutch is bedded in, if I feel like it). But then there's also old people who've bought vRSes because they were good value for money and good cars in general. They don't want their bones rattling on every gearchange so the DMF was used to make the car more drivable in general. But the tradeoff of that is that if you do drive it like a hooligan, you will knacker the DMF.

You can't have everything at once and compromises have to be made rather more than you'd think. Why didn't the Fab vRS come with an FMIC as standard? Tradeoff of cost/performance, it might have allowed more power, but would have put the cost up. Why didn't it use Ibiza Cupra console bushes by default? Tradeoff of comfortable/uncomfortable. All easy aftermarket upgrades that could have been on from the factory but weren't. Same story with SMFs I reckon, they could have fitted them from the factory, but while the performance-biased people would have loved it, everyone else would have hated it. And everyone else is a bigger market.

Cars will always be a compromise.

Is the DMF the same as in the 1.8t cars?b