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4.0TT Turbo Failure Thread - S6 S7 RS7 A8 S8

A8 / S8 (D4 Platform) Discussion Discussion Forum for the D4 Audi A8 Produced from 2010-2017 Audi S8 produced from 2012-2017
View Poll Results: 4.0TT Have your turbos blown yet?
2013 - NO
24
27.27%
2013 - YES
9
10.23%
2014 - NO
13
14.77%
2014 - YES
5
5.68%
2015 - NO
13
14.77%
2015 - YES
2
2.27%
2016 - NO
13
14.77%
2016 - YES
0
0%
2017 - NO
8
9.09%
2017 - YES
1
1.14%
Voters: 88. You may not vote on this poll

4.0TT Turbo Failure Thread - S6 S7 RS7 A8 S8

 
Old 02-05-2019, 09:11 AM
  #21  
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Originally Posted by mhoran89 View Post
Same here, more details on this would help a lot of folks. See if you can get a pic of any paperwork your coworker has...
My mistake. Sorry to get anyone's hopes up. They also have an Allroad in the familly and it was related to the 2.0T.
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Old 02-05-2019, 09:27 AM
  #22  
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Originally Posted by mhoran89 View Post
So those were not genuine Audi parts?
no. Audi does not sell cores only and the audi wanted about $3000 a piece. So, no, I was not ready to pay $10k to replace the turbos.
And yes, I did it myself.
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Old 02-05-2019, 09:56 AM
  #23  
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Originally Posted by mhoran89 View Post
Just a thought... is it worth it to post a link to this thread in the C7 - S6, S7, & RS7 sections?
I would say absolutely. Same engine base with same problem reported. Also, more production on those cars and thus more experience/results to harvest.
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Old 02-05-2019, 11:03 AM
  #24  
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Originally Posted by spdemon91 View Post
I would say absolutely. Same engine base with same problem reported. Also, more production on those cars and thus more experience/results to harvest.
I posted in the C7 S6 S7 RS7 sections, hope I hit them all. I linked this thread in my first post, hopefully we get some more input from the other 4.0TT folks!
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Old 02-05-2019, 05:52 PM
  #25  
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Originally Posted by mhoran89 View Post
Sorry about that. If someone can provide the link to the TSB for the oil feed screen I can edit my original post...
From the other Forum posting, most recent I have seen is version 4, shown below.











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Old 02-05-2019, 05:58 PM
  #26  
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Try this search term for the PDF file:

21 Engine difficult to start, turbocharger damaged, V8 4.0TFSI

This link: http://www.revbase.com/BBBMotor/TSb/...dPdf?id=205336
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Old 02-05-2019, 06:30 PM
  #27  
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There are 44 Audi 4.0TT failed turbos on another forum.

Here is the Silly Rabbit Motorsports gasket sets, Turbo cartridge aand turbo upgrades....4.0TFSI RS7 CHRA Turbo Upgrade

"Factory size and hybrid RS6 RS7 S8 Turbo core upgrade to take your S6 S7 A8 to stage 3 power or simply replace your blown RS6 RS7 S8 chra's. For more power than RS7 OEM turbos, you need to look at the ball bearing upgrade solution listed here http://sillyrabbitmotorsport.com/tur...turbo-upgrade.
New compressor covers are available for 300$ avoiding the core exchange process.

CORES ARE NO LONGER REQUIRED! Please choose the option that best suits your needs

NOTE:

* The S6/S7/A8 CHRA size is the OEM cast wheel compressor to replace blown turbos.
* The RS6/RS7/S8 CHRA size is the OEM billet wheel compressor to upgrade from S6/S7/A8 or to the OEM billet wheel spec.

!!!!ATTENTION!!!!

4.0TFSI Turbo failure gaskets hardware
TSB gaskets, screens, checkvalves + misc hardware to correctly reinstall your new 4.0tfsi turbochargers. These parts must be used (or sourced from your local dealer) when replacing blown turbochargers. The defective parts provided by Audi USA are what caused your turbos to fail."
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Old 02-06-2019, 04:35 AM
  #28  
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2013 S8 with 77K miles, APR Stage 1 and 2, and I drive it like I stole it, hard. Probably just a matter of time on the turbos. I'm already looking into silly rabbit and others.
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Old 02-06-2019, 01:27 PM
  #29  
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So this thread (and others like it) have been giving me heartburn for some time, so I figured I better chime in. I purchased my 2013 S8 with 48,000 miles on it in October of 2017. <knock wood>It now has about 58,000 trouble free miles <\knock wood>

The previous owner (or more likely the dealer that took it back in on lease expiration) did the turbo coolant line TSB on mine just before I purchased it. Unfortunately, that TSB doesn't cover the upgraded oil strainer or check value.

So here's my question...

If the 'Optimized' oil strainer ($15) and check valve ($50) fixes the problem, why wouldn't AOA just issue a recall? They should be able to upgrade every single 4.0 TFSI in USA for less than the cost of one new D5. Its certainly a hell of a lot less money than a set of blown turbos for us faithful customers left twisting in the wind. Does it make sense to just do this at my next service visit?

Originally Posted by m444 View Post
There are 44 Audi 4.0TT failed turbos on another forum.

Here is the Silly Rabbit Motorsports gasket sets, Turbo cartridge aand turbo upgrades....4.0TFSI RS7 CHRA Turbo Upgrade
Has anyone done the Silly Rabbit upgrade? Is this a reasonable prophylactic to undertake? And my big concern would be, why wouldn't the upgraded turbo's fail just like the factory turbos are prone to do? And does Silly Rabbit have an ECU tune that works with the upgraded turbo's? Does APR tune work well with the upgraded turbo's?

You see honey, I had no choice but to get the upgraded turbos for my S8 and an APR stage 1 tune. The Audi turbo's blow up and cost $10k to replace. Silly Rabbit has better turbo's for only $2k. It's a smart and prudent investment. If we don't get in front of this now and fix it before it breaks... oh well, I suppose the kids can always put themselves through college.

Lastly I'll just say that I'm not going to throw in the towel on this car - it seems we have some options. Luckily with turbo's on the top of the engine and they appear to be somewhat easy to service. And service, with what sounds like, potentially better performing aftermarket parts. So even if they do go, a fix can be had for roughly $2k-3k. That just doesn't seem that terrible to me - certainly not worth a case of heartburn. I get it and I'm with you: a $10k repair bill keeps me awake at night. $3k I can live with - maybe even jump in and do it as preventative maintenance. But I'll have to learn more about what the aftermarket options are before making my decision.
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Old 02-06-2019, 02:09 PM
  #30  
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All these companies offering bigger/better.... where are they sourcing their parts/components from? And people end up paying more than oem turbos.
Just a thought....
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