Milltek Problem

4.0 V8 40v biturbo TFSI - 591 bhp
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lem
2nd Gear
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Joined: Fri Aug 29, 2014 6:42 pm
Location: Herts

Milltek Problem

Post by lem » Thu Dec 31, 2020 1:47 pm

Hi all - had a Milltek fitted in the summer to my C8 and developed a problem in the last couple of days.

Basically the valve on the passenger side of the exhaust currently has a mind of its own, opening and closing randomly even when on idle, while the driver side one only opens and closes as it supposed to as per the exhaust setting. Its constantly doing it, occasionally staying shut for a few seconds then opening again, then immediately shutting again, then opening again (you get my drift)

Means that as I drive along I have the exhaust sounding loud / quite / loud / quite ever few seconds etc for any journey. Which is bloody annoying!

Seemed to first happen after about 45mins motorway run. I have used some WD40 to see if that worked and the value was clogged up but to no avail. Probably going to have to go back to where I had it fitted (as it will still be under warranty) unless its a quick fix and someone else has experienced it before?
Current:
2024 R8 - Daytona Grey
2023 Mercedes G63 AMG
2022 SQ5 - Grey

Most recent Audi
2020 RS6 Vorsprung - Sebring Black
2017 RS6 Performance - Ascari Blue

Tadass910
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Re: Milltek Problem

Post by Tadass910 » Fri Jan 01, 2021 2:46 pm

Did you try contact Milltek?

lem
2nd Gear
Posts: 215
Joined: Fri Aug 29, 2014 6:42 pm
Location: Herts

Re: Milltek Problem

Post by lem » Sat Jan 02, 2021 12:30 pm

Yes, but as per their website 'having purchased products directly from an authorized Milltek Sport dealer, all warranties must be handled initially by that dealer'
Current:
2024 R8 - Daytona Grey
2023 Mercedes G63 AMG
2022 SQ5 - Grey

Most recent Audi
2020 RS6 Vorsprung - Sebring Black
2017 RS6 Performance - Ascari Blue

RS6chris!
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Re: Milltek Problem

Post by RS6chris! » Sat Jan 02, 2021 3:13 pm

No surprise for a Milltek to be fair....renowned for <beep> quality.
RS6 C8 carbon black(merlin)
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lem
2nd Gear
Posts: 215
Joined: Fri Aug 29, 2014 6:42 pm
Location: Herts

Re: Milltek Problem

Post by lem » Sat Jan 02, 2021 4:32 pm

RS6chris! wrote:
Sat Jan 02, 2021 3:13 pm
No surprise for a Milltek to be fair....renowned for <beep> quality.
I'm not going to argue on that one given my current situation :bigblink:
Current:
2024 R8 - Daytona Grey
2023 Mercedes G63 AMG
2022 SQ5 - Grey

Most recent Audi
2020 RS6 Vorsprung - Sebring Black
2017 RS6 Performance - Ascari Blue

Tadass910
5th Gear
Posts: 1279
Joined: Fri Nov 11, 2016 8:39 pm

Re: Milltek Problem

Post by Tadass910 » Sat Jan 02, 2021 8:03 pm

lem wrote:
Sat Jan 02, 2021 12:30 pm
Yes, but as per their website 'having purchased products directly from an authorized Milltek Sport dealer, all warranties must be handled initially by that dealer'
If you bought from authorized dealer try contact them, for me personally it’s strange, how new exhaust can have issues, I own Miltek none resonated exhaust on my c7 rs6 since 2016 autumn and have no issues, only one flap year ago started not closing correctly, but i am using from time to time wd40 so it helps

dannyuk
2nd Gear
Posts: 172
Joined: Sat Feb 16, 2019 1:56 pm

Re: Milltek Problem

Post by dannyuk » Tue Jan 05, 2021 5:10 pm

Have you checked the connector to the flap, maybe undo and re-seat it, see if that helps.
2020 C8 RS6
2019 F90 M5
2017 C7 RS6
2016 F10 M5
2010 C6 RS6

lem
2nd Gear
Posts: 215
Joined: Fri Aug 29, 2014 6:42 pm
Location: Herts

Re: Milltek Problem

Post by lem » Tue Jan 05, 2021 6:55 pm

dannyuk wrote:
Tue Jan 05, 2021 5:10 pm
Have you checked the connector to the flap, maybe undo and re-seat it, see if that helps.
Yeah, it all looks ok, and I would expect (but I'm no expert) that if it was disconnected then the flap would be either open or shut, and not continuing to do its merry dance of open, close, open, close every few seconds. I sound like Chitty Chitty Bang Bang driving down the road. :oops:

Its going in Friday to the place I had it fitted to see if they can remedy it
Current:
2024 R8 - Daytona Grey
2023 Mercedes G63 AMG
2022 SQ5 - Grey

Most recent Audi
2020 RS6 Vorsprung - Sebring Black
2017 RS6 Performance - Ascari Blue

Tadass910
5th Gear
Posts: 1279
Joined: Fri Nov 11, 2016 8:39 pm

Re: Milltek Problem

Post by Tadass910 » Wed Jan 06, 2021 4:06 pm

lem wrote:
Tue Jan 05, 2021 6:55 pm
dannyuk wrote:
Tue Jan 05, 2021 5:10 pm
Have you checked the connector to the flap, maybe undo and re-seat it, see if that helps.
Yeah, it all looks ok, and I would expect (but I'm no expert) that if it was disconnected then the flap would be either open or shut, and not continuing to do its merry dance of open, close, open, close every few seconds. I sound like Chitty Chitty Bang Bang driving down the road. :oops:

Its going in Friday to the place I had it fitted to see if they can remedy it


Yep that’s the best you can do, did you checked (scanned) any error codes ?

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