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Re: Grinding noise from engine..
Posted: Wed Jun 24, 2009 11:35 am
by Scotsman72
willu wrote:Had mine on the ramp trying to find it too! Failed, it only makes a noise under load with some boost on, the exhaust is not the same as the gti and my dealer thinks that's where the noise comes from...
I'm thinking the same ... changing the turbo made no difference at all, if it was that then the sound would at least change slightly.
There is apparently a mod out for the diesel to alter the gas flow into the turbo.
Maybe the routing of the pipework on the scirocco is causing some turbulence entering the turbo causing some resonating / flutter of the vanes ??
Just a thought . . . hopefully the more complaints VW get then they'll look into it.
Re: Grinding noise from engine..
Posted: Wed Jun 24, 2009 12:49 pm
by samir786
Scotsman,
is yours going back in ?
Re: Grinding noise from engine..
Posted: Thu Jun 25, 2009 11:26 am
by Scotsman72
No plans at the moment ... there was talk about changing the back part of the exhaust system, but i don't think that's the issue so we've agreed to wait if VW tech come back with anything over the next month or so to see how to proceed.
Re: Grinding noise from engine..
Posted: Thu Jun 25, 2009 12:42 pm
by samir786
Im considering not to bother taking it in, as it seems whoever has taken the car in still has the problem. Would rather wait for a proper fix on this rather than guessing by replacing the turbo, exhaust etc
Re: Grinding noise from engine..
Posted: Thu Jun 25, 2009 5:24 pm
by JakeH
There's an older thread on here titled 'Funny Noise' which seems to refer to the same thing (I think) and someone mentioned that they bent the heat shield on the exhaust and it solved the problem. Don't know what part of the heat shield or whereabouts but I'd like to know more.
Re: Grinding noise from engine..
Posted: Fri Jun 26, 2009 3:12 pm
by samir786
The fantastic service team(!) at the local dealers took the car for the day and said 'Theres nothing wrong with it'
Fair enough, I'll take the car away and just drive around trying to ignore the noise
Joking aside, i'll take a look at the other thread and see if theres a suggestion as to where to bend the heatsheild. I vaguely remembering somebody else bending the heatsheild but the problem still being there (Maybe they didnt bend it in the right place)
Re: Grinding noise from engine..
Posted: Sat Jun 27, 2009 8:19 am
by BAIKAR
samir786 wrote:Im considering not to bother taking it in, as it seems whoever has taken the car in still has the problem. Would rather wait for a proper fix on this rather than guessing by replacing the turbo, exhaust etc
thing is that in order for there to be a fix the dealer needs to see the car and send a report to vw. The more reports the faster it will get sorted. So everyone call in to your local dealer the next time your passing and report it. Most dealers will send a tech out for a spin if they are free and you don't really need to get booked in for this. A 1 min drive is enough.
If the noise is only under load has anyone tried on the dsg holding it on the brakes whilst 2000-3000 rpm, that way at least you can check underneath for heatshields etc
Re: Grinding noise from engine..
Posted: Mon Jun 29, 2009 10:44 am
by samir786
Re: Grinding noise from engine..
Posted: Thu Jul 16, 2009 6:10 pm
by langley182
got this noise on my brand spanking gt 2.0 tsi dsg. picked it up 14th july noticed noise the same day. its shit how a 20k+ new car can have that sound. and how can they say its normal.. anyway..
a guy called dafterpunk on another thread said he had his in at vw and they said its rattling of the wastegate actuator adjuster at turbo and is a construction-related noise and no parts are being damaged so doesnt warrant a repair!!>!>
looks like its DIY maybe, if i can quiet it down without affecting its function!! ill let ya know how it goes!!
Re: Grinding noise from engine..
Posted: Sun Jul 19, 2009 4:47 pm
by stickyroc
I have been on "scirocco.net" with the same problem.....Look under tech, its the thread with the most posts!!!!
My car has had a new turbo fitted..It made the problem worse!!!!
The car is now in Milton Keynes, (head office) being looked at so i'll keep you all up to date on here as well as Scirocco.net.
Re: Grinding noise from engine..
Posted: Tue Jul 21, 2009 1:20 pm
by langley182
Does anyone have an after market exhaust or cat or downpipe, inlet pipes etc fitted. And has that affected the noise or got rid of it? As many people have already suggested it could be gas pressure building up etc making a rattle/rasp somewhere in the system. Surely aftermarket parts would alter this noise due to more free gas flow If it is infact a gas flow related issue!? I'm sure you get the general gist of what I'm getting at.
So All you aftermarket boys should give us some feedback.
Cheers.
Re: Grinding noise from engine..
Posted: Tue Jul 21, 2009 3:55 pm
by stickyroc
Went into Dealer today, (car was taken to Milton Keynes VW UK head office), VW now say it could...(as in they dont know???), be the flexible downpipe joint but still say the noise is "part of the character" of the car. The dealer have passed on my letter to VW head office giving them 14 days to cure the fault or i will be rejecting the car so at least they might take things seriously now. The part will be fitted on thursday.
I underlined the fact that i would not be accepting the car back if this doesn't cure the problem and also there are about 20 other owners that want to know what the problem is.
I also mentioned the forum reports about the "wastegate actuator rod" being the problem as it was on the old RS Escort turbo's years ago. Both mechanic and the service manager shrugged their shoulders.....Im not sure if they didnt know what an RS Turbo was or what a wastegate is ??????
Re: Grinding noise from engine..
Posted: Tue Jul 21, 2009 5:34 pm
by langley182
Right guys. Just been out to my roc. Opened the bonnet, while approaching from the vehicles left hand side of the engine bay there is a gap in which you will be able to see the down pipe. You will also see the braided section. If you reach your hand down there and follow the pipe to were it dissappears under the body, then tap upwards onto the heat shield between the pipe and the body you should hear a rattle/ metallic tinny sound. Well mine does anyway. I suspect this is resonating at certain rev range. The car would need to be on ramps or propperly jacked up to take a propper look at this tho. Could people please tell me if this is the case with their cars? It's easy enough to check, just make sure your engine is cold before u do it!!
Cheers
Re: Grinding noise from engine..
Posted: Wed Jul 29, 2009 6:33 pm
by willu
I think the noise is from the area you describe... However, mine is louder when hot and under load so it is very difficult to prove (safely).
I borrowed my old bosses brand new A5 with the same engine... guess what, it makes the same noise, but is harder to hear has it has more sound damping and a different exhaust.
Mine has got much quieter with age. My proffesional view is its not a problem.
W
Re: Rattling noise from engine..
Posted: Sun Aug 02, 2009 2:37 pm
by indibard
Not sure if this has been posted somewhere already but VW have issued guidance on this noise as follows...
Technical product information Transaction No.: 2021062/1
Rattling noises from engine/exhaust system Release date: 10-Jul-2009
Customer statement / workshop findings
Rattling or jarring noise from the engine compartment / exhaust system when accelerating between 2400 and 3000 rpm .
Technical background
Waste gate adjustment rod of the turbo charger rattles when accelerating.
Production change
---
Measure
Do not repair, the noises are construction-related and normal. There is no parts damage.
Warranty accounting instructions
This is no fault in the sense of warranty.
Looks like this will get fixed on newer vehicles with a production change but no such luck if you've already got the car.
Re: Rattling noise from engine..
Posted: Wed Aug 05, 2009 5:54 pm
by adamj
indibard wrote:Not sure if this has been posted somewhere already but VW have issued guidance on this noise as follows...
Technical product information Transaction No.: 2021062/1
Rattling noises from engine/exhaust system Release date: 10-Jul-2009
Customer statement / workshop findings
Rattling or jarring noise from the engine compartment / exhaust system when accelerating between 2400 and 3000 rpm .
Technical background
Waste gate adjustment rod of the turbo charger rattles when accelerating.
Production change
---
Measure
Do not repair, the noises are construction-related and normal. There is no parts damage.
Warranty accounting instructions
This is no fault in the sense of warranty.
Looks like this will get fixed on newer vehicles with a production change but no such luck if you've already got the car.
I really noticed mine making this noise today around 2500 rpm (first time I've not had the radio blaring in ages) Its discusting they know its a problem but won't fix it that thing above is full of arrogance.
Re: Grinding noise from engine..
Posted: Thu Aug 06, 2009 11:37 am
by langley182
Not really buying the idea of the wastegate rod. Had a look at it and seemed pretty solid/no movement.
Removed the black hardpipe at the back of the engine so I could fit my meat hook in.
Leaning over your engine from the front then looking in, about 8 inch down the back of the engine you will see the rod it's pretty long, bout 8 inch, runs along the back of your engine from the actuator on your left to the wastegate assembly about mid way along your engine..
..so I gave the rod a tug and twang, but there was no movement or rattle. obviously this was done when the engine was off and more importantly the wastegate actuator/rod/and wastegate were in their natural closed position...
I was then thinking that this may not be the scenario when the engine is accelerating/under load/ with boost, because obviously as you accelerate with load the boost pressure increases, in turn making the wastegate actuator function, then forcing the rod to operate the wastegate to expel excess boost pressure to avoid overboost. Point is the actuator/rod/ and wastegate would now be in an open position, potentially meaning the rod has more play and movement in it, causing a rattle.
This would be very hard to check for as the car would need to be on a rolling road under load/boost with someones head in the engine etc...not a job I fancy. But anyways, something to ponder over.
Had a little tinker with my noisy heatshields that run from the front-back under the car, still make a horrible rattle when you bang on them, tried to jig them abit but still haven't had propper look as weather has been rubbish, although the noise pattern did change after I squeezed them round abit, ie: less harsh rattle and less sustained. So I'm still hopIng it's got something to do with them.
Laters.
Re: Grinding noise from engine..
Posted: Fri Aug 07, 2009 12:04 am
by tmoneyyy
langley182 Can u pls comback and confirm weather this has fixed the problem and the exact stages u did u fix it... If not, has anybody out there been able to fix this problem?
I have 1.4 DSG 7 gears. The noise seems to be mainly when the car is taking off from a stationary position or driving or rough roads. the sound is Coming from the front right hand side, Defo sound like metal on metal. However somtimes i try to drive to hear the sound and nothing happens. Seem to be random and no particular pattern to when it appears.
What worries me is that two people I know with the same car specs as mine have had their cars returned to the dealership to have a looked at. One requires a new engine, turbo etc... and the other is in a total mess too. They were both complaining of the same noise that im experiancing. However they had done more miles on the clock, about 6000.
Re: Grinding noise from engine..
Posted: Fri Aug 07, 2009 7:03 am
by langley182
Hi tmoneyy, I'm not familiar with the 1.4 dsg cars, I'm not sure how similiar they are to the 2.0 dsg.
From what I gather by reading the posts on this forum the sound is predictable and happens between 2000-3000 rpm ish give or take abit. The vast majority of people who are saying this have the 2.0 cars.
To start I'm not doubting you have the metallic rattle at all, you say you were driving to try and hear it but you couldn't always make it do it, in my experience it will do it everytime with acceleration/load at this rpm range therefore being consistent when it happens. It has never made a difference to me personally if the road was rough and has never done it when setting off.
I recall reading something somewhere about a rattle on some cars which turned out to be a loose piece of trim in the engine bay, this would probably fit your scenario more giving the symptoms you described, have you had a feel around in the engine bay see if anythings loose, pay attention to the black plastic under your windshield where it goes into engine bay.
The rattley parts I believe to have found are the silver heat shields that run under the car from front to back between the exhaust/downpipe and body. Might be worth checking these by having a tap on them (when cold). just to clarify I have had a squidge around of these on mine and changed the sound slightly but not got rid of It completely, need a propper go when weather is good. Also some reports of a wastegate actuator rod rattling have been made, see my previous post for my thougts on that.
Apart from that bud I can't really tell you anymore.
Might be worth taking yours in but be careful cos vw have a good habit of changing random parts on your car based on guess work in hope of curing the problems.
Lang.
Re: Grinding noise from engine..
Posted: Fri Aug 07, 2009 7:42 am
by sideshow bob
Can't say I've noticed any noise, but then again, I drive a Canal Boat.