4.0TT Blown Turbo Poll

[brian_216]

https://www.instagram.com/p/Bi3JCWkg...bbitmotorsport

saw this yesterday- SRM now has an alternate solution to replacing the entire housing - drop in replacement wheels save a ton of money for those not interested in going stage 3- Supposedly more will be on their website soon.

This is amazing. Looking at the post that gives you an RS7 CHRA, comp housing and it all bolts in the stock manifold from any s6 s6. I am so thrilled to see this posted!

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[s4nicetry]

https://www.instagram.com/p/Bi3JCWkg...bbitmotorsport

saw this yesterday- SRM now has an alternate solution to replacing the entire housing - drop in replacement wheels save a ton of money for those not interested in going stage 3- Supposedly more will be on their website soon.

That is great news! I talked to Pure Turbos last week about replacement CHRA's and they said they had no intention to make them as our market was too small to bother with. With SRM offering RS sized CHRA's with a fitted compressor housing for ~$1800, I'm almost hoping my turbos will blow, lol.

[cobrario]

I reached out to SRM and this is an RS7 turbo upgrade option only at this point, the S6 oem replacement can be made if needed.

[biehniac]

Just got done with the 21F2 recall on my '13 S7. Despite visible seepage from the coolant line to the driver side turbo the dealer pressure-tested it and said it was fine... anything to get out of installing new lines and o-rings I guess. Updated the ECM only and cleaned the turbo housing. We'll see what happens...

[Killship]

‘13
APR Stage II
Blown at 88k

Warning sign of an oberboost condition were there.

[Dasquade]

‘13
APR Stage II
Blown at 88k

Warning sign of an oberboost condition were there.

Mind explaining what you mean with 'oberboost condition were there'?

[The Natural]

Hello all,

Sadly need to contribute to this thread on my dad's behalf. His turbos need to be replaced, and it looks like his car may be one of the first 2016s to experience the issue.

2016 RS7 Performance
18,XXX miles
100% stock, never tracked/abused

He sent the car to the dealership three weeks ago, after experiencing intermittent power loss and pulling to the left. This was occurring most frequently when driving in the rain. No CELs ever popped up. After spending over a week with the car, Audi finally opened the turbos and found damage to the compressor wheels.

Here's the real kicker: He spoke with the dealership today and was told that the turbos wouldn't arrive in the United States until July 2nd (they were ordered 11 days ago). That's two months of downtime, not including the repair itself. Furthermore, the dealer says that A) There is a parts supply issue, and 2) They are aware of one other 2016 RS7 in the country that is experiencing a similar problem. I frankly don't understand how you could simultaneously have a global supply issue for a specific part while knowing of only one other car with said problem. Note: this is second-hand information and it's possible some of the details got mixed up.

Audi Service has been supportive throughout this and understands the implications, but I'm still kind of shocked. Photos of the turbos are attached. I'll post an update when I have one.

Cheers, -M

IMG_5646.jpg

IMG_5645.jpg

[Dasquade]

Hello all,

Sadly need to contribute to this thread on my dad's behalf. His turbos need to be replaced, and it looks like his car may be one of the first 2016s to experience the issue.

2016 RS7 Performance
18,XXX miles
100% stock, never tracked/abused

He sent the car to the dealership three weeks ago, after experiencing intermittent power loss and pulling to the left. This was occurring most frequently when driving in the rain. No CELs ever popped up. After spending over a week with the car, Audi finally opened the turbos and found damage to the compressor wheels.

Here's the real kicker: He spoke with the dealership today and was told that the turbos wouldn't arrive in the United States until July 2nd (they were ordered 11 days ago). That's two months of downtime, not including the repair itself. Furthermore, the dealer says that A) There is a parts supply issue, and 2) They are aware of one other 2016 RS7 in the country that is experiencing a similar problem. I frankly don't understand how you could simultaneously have a global supply issue for a specific part while knowing of only one other car with said problem. Note: this is second-hand information and it's possible some of the details got mixed up.

Audi Service has been supportive throughout this and understands the implications, but I'm still kind of shocked. Photos of the turbos are attached. I'll post an update when I have one.

Cheers, -M

IMG_5646.jpg

IMG_5645.jpg

Hmm maybe i'm wrong and noob, but beside some minor chips on the props i don't see any signs of failed bearings. If bearings fail, normally there will be unbalance on the shaft and the propellors will grind their way into the housing and leave a marks...untill they grind too deep and break/shatter.
Again, i might be wrong on this but...sounds and looks bit odd (especially since he only has 18.xxx miles).
*I would demand a 3th party independant second opinion....as i guess it won't fall under waranty?

[cobrario]

Hmm maybe i'm wrong and noob, but beside some minor chips on the props i don't see any signs of failed bearings. If bearings fail, normally there will be unbalance on the shaft and the propellors will grind their way into the housing and leave a marks...untill they grind too deep and break/shatter.
Again, i might be wrong on this but...sounds and looks bit odd (especially since he only has 18.xxx miles).
*I would demand a 3th party independant second opinion....as i guess it won't fall under waranty?

I tend to agree- those chips aren't going to cause intermittent power loss if any power loss at all- they look more like some debris got in the intake tract and nicked the wheel some.

[The Natural]

Hmm maybe i'm wrong and noob, but beside some minor chips on the props i don't see any signs of failed bearings. If bearings fail, normally there will be unbalance on the shaft and the propellors will grind their way into the housing and leave a marks...untill they grind too deep and break/shatter.
Again, i might be wrong on this but...sounds and looks bit odd (especially since he only has 18.xxx miles).
*I would demand a 3th party independant second opinion....as i guess it won't fall under waranty?

No, this is all being covered under warranty. I can't definitively say they identified a failed bearing-- all I know is that the technician says both of the turbos are in need of replacement and he believes this was causing the power loss. No details beyond that, but I've asked my old man to see if he can get a more detailed diagnosis.

I spent a few years working for a dealer group, and am familiar with what is usually required to get approval for major warranty work. They don't like giving it away, which makes me think there is a specific reason for it. I could certainly be wrong though

[cobrario]

No, this is all being covered under warranty. I can't definitively say they identified a failed bearing-- all I know is that the technician says both of the turbos are in need of replacement and he believes this was causing the power loss. No details beyond that, but I've asked my old man to see if he can get a more detailed diagnosis.

I spent a few years working for a dealer group, and am familiar with what is usually required to get approval for major warranty work. They don't like giving it away, which makes me think there is a specific reason for it. I could certainly be wrong though

I see you’re in Va - which dealer is at?

[brilliant_black]

Has anyone with a 2016 S6 or S7 experienced any issues. I really really want to get a 2016 S6 in 1 and a half to 2 years, but these turbo issues are making me very concerned.

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[wwhan]

Has anyone with a 2016 S6 or S7 experienced any issues. I really really want to get a 2016 S6 in 1 and a half to 2 years, but these turbo issues are making me very concerned.

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The TSB for failed turbos also covers 2016 s6, S7, s8, rs7

Look above 2016 rs7 less than 20k miles failed turbo.

[brilliant_black]

The TSB for failed turbos also covers 2016 s6, S7, s8, rs7

Look above 2016 rs7 less than 20k miles failed turbo.

FML wow, I always thought the 4.0T was a reliable platform. Haven't heard any stories of the S tronic blowing up.

Well I guess this means I'll just have to buy one from carmax with a warranty then when the time comes.

Really depressing to see that this problem affects the facelift models.


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[RS7Habu]

Been following this thread for a while...question to those (stock only?) that had failures: was there any audible indication something was wrong?

I ask because I have been experiencing a “wheezing” sound when coming off of light throttle when rpms are around 1500-1700. It’s not just at this rpm range, but seems more noticeable at this range.

Example, traveling normally on a 40mph road (cannot recall if I am in 6th or 7th fear at the time), pressing the throttle slightly to crest a small hill, and when you lift off the throttle, I would hear the sound.

Dealer said after having the car, that they could hear it too when test driving it while in for analysis, but could find nothing wrong. I first thought it was a back-pressure leak, or something similar, but I now wonder if it is the turbos.

Performance, currently, is not affected.

Thoughts?

Thanks,
Steve
‘15 RS7 stock, 21k miles


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[cobrario]

Been following this thread for a while...question to those (stock only?) that had failures: was there any audible indication something was wrong?

I ask because I have been experiencing a “wheezing” sound when coming off of light throttle when rpms are around 1500-1700. It’s not just at this rpm range, but seems more noticeable at this range.

Example, traveling normally on a 40mph road (cannot recall if I am in 6th or 7th fear at the time), pressing the throttle slightly to crest a small hill, and when you lift off the throttle, I would hear the sound.

Dealer said after having the car, that they could hear it too when test driving it while in for analysis, but could find nothing wrong. I first thought it was a back-pressure leak, or something similar, but I now wonder if it is the turbos.

Performance, currently, is not affected.

Thoughts?

Thanks,
Steve
‘15 RS7 stock, 21k miles


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worry not, that's likely the BOV or bypass valves blowing back in the intake when you get off the throttle

[brilliant_black]

How are 2017 cars doing? Might want to add those to the poll too.

[RS7Habu]

worry not, that's likely the BOV or bypass valves blowing back in the intake when you get off the throttle

Not to dispute your thought, as this was a thought of mine as well when speaking to the Audi tech, but I never heard this in my previous ‘14 RS7, nor the test drive of another rs7 at the dealer lot (coincidentally there).

I thought also this would not make sense, since the boost is so negligible at this speed/rpm.

Very well could be the answer, though.

Has anyone else ever heard this noise in their car?

Apologies if this beginning to hijack the thread- not the intent.


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[cobrario]

Not to dispute your thought, as this was a thought of mine as well when speaking to the Audi tech, but I never heard this in my previous ‘14 RS7, nor the test drive of another rs7 at the dealer lot (coincidentally there).

I thought also this would not make sense, since the boost is so negligible at this speed/rpm.

Very well could be the answer, though.

Has anyone else ever heard this noise in their car?

Apologies if this beginning to hijack the thread- not the intent.


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No worries, I had the exact same noise on stock airbox, it’s still there albeit much less noticeable with the AWE.

[zcd2.7t]

The TSB for failed turbos also covers 2016 s6, S7, s8, rs7...

Sorry, which "TSB for failed turbos..."?

[zcd2.7t]

FML wow, I always thought the 4.0T was a reliable platform...

I guess that's a matter of perspective, right? ~86% of us haven't had turbo issues. Does that make the platform reliable or not?

[wwhan]

Sorry, which "TSB for failed turbos..."?

> Leaks in intake tract allowing outside unfiltered air and debris into the turbocharger
> Poor oil supply of turbocharger

[wwhan]

An updated TSB: audi tsb 21 Engine difficult to start, turbocharger damaged

[zcd2.7t]

An updated TSB: audi tsb 21 Engine difficult to start, turbocharger damaged

Thx!

[Carl Weathers]

Having been shopping several 4.0T platforms recently, this thread may scare me back to the 3.0

[zcd2.7t]

Having been shopping several 4.0T platforms recently, this thread may scare me back to the 3.0

Oh, so you can deal with thermostat issues and/or transmission mechatronics problems (DSG)?

Seriously, as an Audi driver for the past 18+years, the 4.0T platform appears to be as robust as current Audis get...

[lapsandwich]

Not to dispute your thought, as this was a thought of mine as well when speaking to the Audi tech, but I never heard this in my previous ‘14 RS7, nor the test drive of another rs7 at the dealer lot (coincidentally there).

I thought also this would not make sense, since the boost is so negligible at this speed/rpm.

Very well could be the answer, though.

Has anyone else ever heard this noise in their car?

Apologies if this beginning to hijack the thread- not the intent.


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That almost sounds exactly like my turbos did before they started failing, almost like an unusual wheezing noise at lower rpm. It's a little difficult to describe but I think you said it best.
I'd have them checked out, my car didn't show many signs of turbo failure, but you could tell something was off. Rough idle and uncommon turbo noises, things like that.

[wwhan]

That almost sounds exactly like my turbos did before they started failing, almost like an unusual wheezing noise at lower rpm. It's a little difficult to describe but I think you said it best.
I'd have them checked out, my car didn't show many signs of turbo failure, but you could tell something was off. Rough idle and uncommon turbo noises, things like that.

It could be the turbo vanes scraping the housing at low rpm, due to shot bearings.

[EuroxS4]

I believe there are updated oil feed lines that have a finer mesh to filter out fiber material in the oil.


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[brian_216]

I believe there are updated oil feed lines that have a finer mesh to filter out fiber material in the oil.


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There is no filter or mesh in the oil lines. There is a strainer screen located in the block where the oil lines attach. Otherwise I can assure you the lines are straight tubing inside.

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[Carl Weathers]

Oh, so you can deal with thermostat issues and/or transmission mechatronics problems (DSG)?

Seriously, as an Audi driver for the past 18+years, the 4.0T platform appears to be as robust as current Audis get...

No DSG here. Thermostat and motor mounts replaced as is typical. Pardon if my assumption is wrong that blown turbos is a more intensive problem that the usual platform bugs.

[zcd2.7t]

No DSG here. Thermostat and motor mounts replaced as is typical. Pardon if my assumption is wrong that blown turbos is a more intensive problem that the usual platform bugs.

You can assume whatever you wish.

When a problem affects less than 15% of the type of people that frequent an Internet car forum, I don’t personally see that as a big red flag. YMMV.

[shoe3k]

FML wow, I always thought the 4.0T was a reliable platform. Haven't heard any stories of the S tronic blowing up.

Well I guess this means I'll just have to buy one from carmax with a warranty then when the time comes.

Really depressing to see that this problem affects the facelift models.


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It is a reliable platform, especially for the power levels it produces. Audi can't help if there is a defect from a 3rd party vendor that supplies the turbo.

[Carl Weathers]

You can assume whatever you wish.

When a problem affects less than 15% of the type of people that frequent an Internet car forum, I don’t personally see that as a big red flag. YMMV.

If you can convince yourself that 15% is acceptable to make you feel better about your choice of car, then go nuts. You don't really have to go straight to dick mode if 15% causes others to rethink that purchase.

[brilliant_black]

It is a reliable platform, especially for the power levels it produces. Audi can't help if there is a defect from a 3rd party vendor that supplies the turbo.

Then there should be a full recall to fix the cars. In the TSB it states that if the car is out of warranty then the owner can go and pound sand.

I want to go stage 1 as soon as I get mine, which would effectively void any warranty. So I'd prefer that problems such as this would get addressed quickly.

Audi always lags it with major issues. There was no recall on the 2.0T oil consumption only a lawsuit settlement years after.

They issue recalls for smaller stuff like water pumps.

The TSB states that all VIN number ranges are covered so why don't they issue a recall?

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[s4nicetry]

The TSB states that all VIN number ranges are covered so why don't they issue a recall?

The TSB is to notify the mechanic/service dept what to look for, what to be replaced etc. in a particular scenario. They are not saying it is a problem and all of them need to be fixed, although by having it on a TSB we know they are aware of the issue. Audi would never openly admit how many 4.0T's are affected by this. I think about the only way to push Audi into revealing actual numbers or possibly moving to a recall would be getting everyone with the problem to report it to the NHTSA and hope it is enough for them to investigate further, or start a huge media campaign on the issue and hope it goes viral or is picked up by 60 minutes or something, or a large group gets together and files a class action against Audi.
The thing is, we don't know how big of a problem it really is. If the NHTSA investigates and finds that only ~10% of the turbos have failed or something they won't press further and Audi will still tell everyone to go pound sand.

[zcd2.7t]

...You don't really have to go straight to dick mode if 15% causes others to rethink that purchase.

Like I wrote, YMMV.

And speaking of dick mode, disqualifying an entire class of cars ON THE FORUM DEDICATED TO THOSE CARS based on a cursory examination of the situation and no personal experience certainly qualifies you for that mode as well.

Have a nice day.

[brian_216]

The only way to prevent this honestly is more frequent oil changes and pull the oil plate in the valley and clean the screen every 30k miles. Once that screen plugs up it's too late. And tuning the car is making higher boost levels, making the turbos work harder. So yes, protect your investment and replace the screen before you tune the car if you want it to last. Just my findings. Take it for what you will.

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[Hofahome]

I love how they put "poor oil supply to turbocharger" as last reason for failure on the tsb. um, that IS the reason you asshats.


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[Carl Weathers]

The only way to prevent this honestly is more frequent oil changes and pull the oil plate in the valley and clean the screen every 30k miles. Once that screen plugs up it's too late. And tuning the car is making higher boost levels, making the turbos work harder. So yes, protect your investment and replace the screen before you tune the car if you want it to last. Just my findings. Take it for what you will.

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What would you consider adequate frequency for changes?