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  1. #1
    Established Member Two Rings GR8VTen's Avatar
    Join Date
    Feb 19 2021
    AZ Member #
    588130
    Location
    Redmond, WA

    The $8,000 valve spring - yes, 4.0TT's have this issue!

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    Springs.jpg
    This is a conclusion of my initial thread of misfires and rough running on my 2014 RS7, a broken 4.0TT valve spring ($20!) on cylinder #8, at 49,000mi. No tunes, no hard driving, this happened at 1,500 RPM in the neighborhood. There's no way to fix it other than drop the engine and transmission and take the engine head off for replacement. Total end-end cost for the one spring performed by a top indie shop, $8,000. We calculated Audi would have charged more than $15,000 for this, Audi wanted $6,100 just to 'start' the exploration. Of course this happened 4 weeks after my extended warranty expired! - there's no way Audi would have covered this under good faith even though I've bought 6 Audi's from them over the last few years, they wouldn't have carried the risk of potentially an entirely new engine if it was something else which would have sunk them more than $30,000.

    Moral of this story, sell before warranty expires and/or get the 10 year warranty. When these things break, they break the bank!! But there is a 'price to play' with these high end toys when they get up in their vintage
    2021 RS7 Daytona Gray Pearl Effect
    2021 RS5 Navarro Blue

  2. #2
    Veteran Member Three Rings
    Join Date
    Jan 09 2013
    AZ Member #
    107205
    Location
    UK

    Wow, really sorry to hear this. Are you just replacing the one or all of them whilst you’re there and is that with uprated springs or OE?


    Sent from my iPad using Tapatalk

  3. #3
    Veteran Member Four Rings digdah's Avatar
    Join Date
    Dec 11 2017
    AZ Member #
    411044
    Location
    DFW

    Ouch. Yes, these cars are bank thieves. Shameless how they go about draining the accounts honestly.

  4. #4
    Veteran Member Four Rings A6sport's Avatar
    Join Date
    Mar 11 2007
    AZ Member #
    16309
    My Garage
    4L Q7 3.0T Stage II, D4 A8L 4.2, A5 2.0t APR stage III, MK1 TT 225 APR stage I 2022 Q8 3.0T Stock
    Location
    Colorado Springs

    The 4.0tt is the new 2.7tt of old, awesome motors very tuneable but they will break your heart along the way...
    2022 Q8 S line Prestige Stock
    2015 Q7 S line Sport+ APR Stage II DP
    2012 A7Plus APR Stage II+ UC
    2012 A8L 4.2
    2010 A5 2.0T APR K04 Stage III
    2002 TT 225 Roadster APR Stage I

    Still own them all...

  5. #5
    Established Member Two Rings GR8VTen's Avatar
    Join Date
    Feb 19 2021
    AZ Member #
    588130
    Location
    Redmond, WA

    I chose to only replace the one, to replace all would be an additional $3,000. The shear amount of labor to replace 32 springs on both cylinder banks is pure labor cost, so I'm taking the chance with probability that lightning doesn't strike twice.
    2021 RS7 Daytona Gray Pearl Effect
    2021 RS5 Navarro Blue

  6. #6
    Veteran Member Four Rings VinnysS4's Avatar
    Join Date
    Nov 12 2015
    AZ Member #
    364349
    My Garage
    2004 s4 Avant, 2005.5 S4 Manual swapped, 2002 A4 3.0 6 speed, 2004 A4 1.8 5 speed
    Location
    Oregon

    I’d be interested in learning why the head has to come off to change a valve spring. The cams, yeah I can see that, but the heads? I’ve done valve jobs on many many cars, including several models of Audis and there seems to always be a way to do it without removing the heads.


    Sent from my iPhone using Tapatalk
    1997 VW GTI VR6 (sold), 2003 Audi RS6 (sold), 2010 Audi A4 2.0T (RIP Totaled on 11/2/2015 ) 2005.5 Audi S42011 Dieselgate Q7 TDI..... patiently waiting for my warranty to expire!!

    My build log
    http://www.audizine.com/forum/showth...-s-s4-timeline

    "Everyone is An expert when they make their own category."

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