1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Audi s3 8l exhaust rattle from downpipe help?

snowden952 Apr 4, 2014

  1. snowden952

    snowden952 Member

    90
    1
    8
    I have recently fitted a relentless down pipe and decat and it has started to vibrate and rattle really loudly when I come off the accelerator any one know what could be causing this?
     
  2. VAG-Slag

    VAG-Slag Well-Known Member

    1,743
    399
    83
    I've heard a few of them have been knocking on the prop-shaft... What does clearance look like down there?
     
  3. snowden952

    snowden952 Member

    90
    1
    8
    Not to sure ill have to have a look at it tomorrow as I'm at work now but its only come on since I properly supported it on the hanger before it was fine
     
  4. Lavis89

    Lavis89 Well-Known Member Regional Rep Team Sprint Audi S4 Audi A3

    1,758
    598
    113
    Mine used to rattle a lot when I was pulling away, put on a powerflex bush on the dogbone mount, solved my problem
     
  5. snowden952

    snowden952 Member

    90
    1
    8
    I've just bought one will be here tomorrow thanks
     
  6. Crazypete00

    Crazypete00 Active Member Audi S3 Audi A4

    460
    56
    28
    did you sort the rattle out? think mine is doing it on the subframe. happens when im reversing and letting off, so guessing its when the engine moves forwards on its mounts
     
  7. Chlippo

    Chlippo Member

    679
    15
    18
    I have exact same problem.

    I beleive powerflex (or any solid) engine mounts would reduce the engine movement and by doing so, reducing the chances of the downpipe knocking on anything next to it. The clearance is tight
     
  8. kwistof

    kwistof South East Events Moderator Regional Rep

    2,434
    535
    113
    <tuffty/> likes this.
  9. Crazypete00

    Crazypete00 Active Member Audi S3 Audi A4

    460
    56
    28
    thanks kwistof, i did do a seach last night and spent about an hour going through old threads.

    so loosening the engine mounts and pushing it over as far as it goes to the passengers side is worth a shot before replacing the mounts then.
     
  10. kwistof

    kwistof South East Events Moderator Regional Rep

    2,434
    535
    113
    No worries- I have pointed that thread to at least half a dozen people just in the past month tbh! lol

    That's definitely the first place to start, be it the cheapest/easiest/quickest option- as you can see in that thread that didn't work for me unfortunately but as soon as the engine mounts were replaced I haven't heard a knock/bang since and I give my car a good thrashing at times :)
     
  11. Crazypete00

    Crazypete00 Active Member Audi S3 Audi A4

    460
    56
    28
    thanks again. if you know any mods that can possibly add little bits of info like this to the sticky's. there is a sticky about the xs power DP and cat so adding something like this on the end would be great.
     

Share This Page