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View Poll Results: 4.0TT Have your turbos blown yet?
2013 - NO
95
19.15%
2013 - YES
67
13.51%
2014 - NO
55
11.09%
2014 - YES
30
6.05%
2015 - NO
69
13.91%
2015 - YES
28
5.65%
2016 - NO
71
14.31%
2016 - YES
15
3.02%
2017 - NO
56
11.29%
2017 - YES
10
2.02%
Voters: 496. You may not vote on this poll

4.0TT Turbo Failure Thread - S6 S7 RS7 A8 S8

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Old 09-10-2021, 12:37 PM
  #771  
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Seems strange. I wonder why they did all the redesigns instead of remove. Since my third party (Audi branded) warranty covered mine at 80k mi, I went with just what Audi just planned to do with the new screen. Hopefully the new screen works sufficiently better.
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Old 09-10-2021, 01:00 PM
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Originally Posted by schalliol
Seems strange. I wonder why they did all the redesigns instead of remove. Since my third party (Audi branded) warranty covered mine at 80k mi, I went with just what Audi just planned to do with the new screen. Hopefully the new screen works sufficiently better.
Because Audi operates like a company with engineers. They need to supersceed the part, not just eliminate it... Regular people would just ditch the screen and move on.
If you are worried about turbo failure I would also suggest 5K OCIs. I do 5K OCI on all VAG cars and it is cheap peace of mind.
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Old 09-10-2021, 01:40 PM
  #773  
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Originally Posted by 09S5
That's a true statement. The risk is to high for me.Turbos blow because oil contaminates get caught in the screen, clogging the screen... taking the screen out just let's all that stuff go through your turbo instead.

that's like removing your AC filter in your house because it gets clogged up with dust and allergens. lol
not really tho. Your oil system already has a filter that does that for you. Regular oil changes will keep the oil clean. Unless you have other problems cause metal in the oil. But at that point, you have more expensive problems than some turbos.

in your analogy, I would think of the oil screen as someone having another filter at each vent in their house.

of course I could be really wrong 🤣
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Old 09-11-2021, 04:19 AM
  #774  
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Originally Posted by Nandor690
not really tho. Your oil system already has a filter that does that for you.
Unfortunately, this isn’t the case. The 4.0L engine has an oil bypass to increase oil flow at high RPMs/loads. This oil bypass is why the screen is there.
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Old 09-11-2021, 04:44 AM
  #775  
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What oil do you guys use? Would 5K changes really help? I can attach my oil analysis PDFs from my oil changes if helpful.
Last edited by schalliol; 09-11-2021 at 05:03 AM.
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Old 09-11-2021, 06:10 AM
  #776  
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.
This is like Deja Vu all over again
.
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Old 09-11-2021, 07:40 AM
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Originally Posted by uttevrec
Unfortunately, this isn’t the case. The 4.0L engine has an oil bypass to increase oil flow at high RPMs/loads. This oil bypass is why the screen is there.
any literature on this? Because that makes no since at all.
the oil bypass valve should only open if the filter becomes to clogged up.
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Old 09-11-2021, 08:15 AM
  #778  
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Originally Posted by Nandor690
any literature on this? Because that makes no since at all.
the oil bypass valve should only open if the filter becomes to clogged up.
There is no bypass for the screen, you are correct.
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Old 09-11-2021, 09:25 AM
  #779  
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The bypass is for the oil filter, not the screen...
.
This topic has previously been beaten to death in this forum.
.
Last edited by A8L_New_England; 09-11-2021 at 09:28 AM.
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Old 09-11-2021, 03:00 PM
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Originally Posted by A8L_New_England
.
The bypass is for the oil filter, not the screen...
.
This topic has previously been beaten to death in this forum.
.
yes we know. But that guy was saying that the oil bypass will bypass the filter when at high rpm’s. Which is nonsense.
not sure why anyone would think the screen would get bypassed.
he brought that up when I suggested to just remove the screen all together
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