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Prawn and BigAls A3 Track Car

Discussion in 'A3/S3 Forum (8L Chassis)' started by Prawn, Dec 29, 2010.

  1. daz-20vt

    daz-20vt Well-Known Member

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    Im back!! Gutted mate!!! Hahaha. Oh well i got 2 weeks to to fit my sump and sriip more weight. Not forgetting sorting doorcards!!
     
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  3. daz-20vt

    daz-20vt Well-Known Member

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    Page 3 i had to go to find this!!
    Sort it out!!

    Did you book?
    Any spoiler news/updates?
     
  4. Prawn

    Prawn My other car is a MINI!!!!

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    Bedford booked yes :)

    Wing offered kindly by Ben sadly wasn't suitable for our car :( sad face :(

    Found a few other wing options, but they can wait for now.

    Hoping to do some work on it this weekend. Want to reinforce the wishbone mounting points on the subframe, and soften the front ARB and maybe even do some experimenting with dampers depending on how i get on.
     
  5. Gops

    Gops 6th gear @7000rpm

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    image.jpg

    :thumbsup:
     
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  6. daz-20vt

    daz-20vt Well-Known Member

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    Gops is right.
    You need a Renault avantime
     
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  7. Prawn

    Prawn My other car is a MINI!!!!

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    I give up.

    Spent all day on this clunk, reinforced the subframe with 3mm plate around the wishbone mounting holes, redid the subframe mounts with a custom poly sleeve between the bolt and mount, bonded the solid bushes into the subframe to remove ANY chance of any movement.

    Everything is done up so tight. i can't make ANYTHING move with the wheels off the deck, yet it still clunks as SOON as I pull forward, then clunks back when I touch the brakes.

    It's not a big clunk, but I can hear / feel it still.

    It does it regardless of drive situation, in gear, out etc etc.

    It's definitely suspension related, you replicate the 'acceleration clunk' by braking in reverse. It's something moving one way when the wheels are loaded up in either direction, this makes me think it's not engine mounting / dog bone movement.

    it's driving me insane.
     
  8. MARC87

    MARC87 New Member

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    Im getting a very similar issue. Mine clunks when touching the brakes and then it clunks again when letting off. Also clunks sometimes when pulling away after brakeing. Its also doing my head in but havent had the time to look into it :(
     
  9. daz-20vt

    daz-20vt Well-Known Member

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    You will sort it mate. Still a pita though. You tackle it alone?
     
  10. Prawn

    Prawn My other car is a MINI!!!!

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    Hmmmmmmmmmmmmm

    Tough one mark.

    I've had clunks before on acceleration and let off, and they've been engine mount / dog bone related.

    This one very much NEVER happens when letting off though, and only on application of the brakes, then first touch of throttle after that, hence me being absolutely certain it's suspension related on this occasion.
     
  11. vroomtshh

    vroomtshh Active Member
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    Ever replace any of those one use bolts?
     
  12. Prawn

    Prawn My other car is a MINI!!!!

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    Honestly? No :laugh:

    Perhaps the next logical step. They're fecking tight though!
     
  13. daz-20vt

    daz-20vt Well-Known Member

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    Not as tight as you for not changing them bolts!
    Lol
     
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  14. Alex C

    Alex C Well-Known Member
    VCDS Map User Audi S3

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    just catching up...

    ...do I remember you saying that you also have a heavy duty gear box oil in there now?
     
  15. Prawn

    Prawn My other car is a MINI!!!!

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    Correct Alex :) We run Motul Gear 300 now in the last few boxes and it's been really good.
     
  16. Gops

    Gops 6th gear @7000rpm

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    I had that once prawny.. It was my DV hitting my strut brace lol! Drove me insane! You checked your steering rack bush?
     
  17. Dani_B19

    Dani_B19 Audi-sports own special child.

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    Possibly the suspension? My kw v2's used to knock, was shocking, ended up been the coil over itself, had to buy a new one. Stopped it for ages then its come back, think im going to ditch them and try something else.
     
  18. Prawn

    Prawn My other car is a MINI!!!!

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    I'm thinking that too Dani. Going to look into having the front struts rebuilt as they've seen some service now.
     
  19. scott_159

    scott_159 Member

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    put the car on a 1 man testing mot ramp (shaker plates) this will shake the car around whilst on the ramp and will usually show any failing suspension components, you can also have a good feel of moving parts like the shocks,antiroll bar to try and track down the knocking
     
  20. Golfyste

    Golfyste Member

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    Have you thought about checking around the brakes dude? Not long since you have installed this new set up....loose bolt maybe or play has appeared somewhere?
    Just an idea seen as it's one of the last things you have done?
    The cars looking awesome by the way dude! I don't comment much but constantly keeping upto date on your thread! Keep it up!
     
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  21. Prawn

    Prawn My other car is a MINI!!!!

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    That's a great idea. thanks Scott. I might look into that and see if I can find one locally.


    Good idea mate, but sadly I checked the brakes over at the weekend whilst it was all apart and it all seemed fine. if it did it just on braking back and forth I'd suspect pads moving in the calipers, but this does it when acelerating then braking going forwards, so braking rotation remains constant but the noise still occurs.

    I'm 99% sure it's wishbone / strut / top mount related. i went to town on the wishbones this weekend, so I'm pretty much discounting them. Shocks and top mounts left to eliminate.
     
    #5540 Prawn, May 19, 2014
    Last edited: May 19, 2014
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  23. Sam_

    Sam_ Down under

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    That's a bit of a weird one. I have an annoying clunk that I think is my top mounts. I suspected struts at first so took them in to be rebuilt and re-greased but it made no difference. Mine is more of knocking over certain types of bumps and only on one side. I'm pretty sure mine's the top mounts, just not sure how to fix it.
     
  24. A3-Lee

    A3-Lee Active Member

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    Hi prawn just to add to this I also have said clunk it's so annoying I've changed everything other than drive shafts wonder if it could be those?
     
  25. vroomtshh

    vroomtshh Active Member
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    I can only say what I said before. My wishbone bolts were tight, and the way they work, they aren;t a stretch bolt, but the instant I replaced them, the clunk I had was gone
     
  26. Prawn

    Prawn My other car is a MINI!!!!

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    Fair enough Garry. I'll try it. Will change them over this weekend and see what happens!

    Thanks mate. At least it's a cheap solution so no loss if it doesn't work!
     
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  27. Prawn

    Prawn My other car is a MINI!!!!

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    As you've replaced them recently Garry, you don't happen to know the torque spec of the wishbone bolts do you?

    and perhaps the subframe bolts! I might buy a set of those too.

    I'm ashamed to admit, I actually stripped the thread in the rear drivers side subframe bolt. Too keen to over tighten thing to make the noises stop :( Pretty gutted about it to be honest, but thankfully it's easily accessed from behind, and a front subframe bolt is easily long enough to go up through and put a big nut on the inside.

    Bit of a fail there, but oh well.
     
  28. vroomtshh

    vroomtshh Active Member
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    [​IMG]
    1. Subframe retaining brackets (on body)
    2. Welded nut (in body)
    3. Rear bonded rubber bushing for subframe
    4. Nut, self=locking (always replace)
    5. Bolt (always replace, tighten to 100Nm or 74ft/lb + 1/4 turn or 90 degrees)
    6. Rear bonded rubber bushing for control arm (press in/out)
    7. Bolt (always replace, tighten to 70Nm or 52ft/lbs + 1/4 turn or 90 degrees)
    8. Nut plate
    9. Nut, self-locking (always replace, tighten to 45Nm or 33ft/lb)
    10. Ball joint
    11. Bolts (always replace, tighten to 20Nm or 15ft/lb +1/4 turn or 90 degrees
    12. Control arm
    13. Stabilizer connecting link
    14. Bolt (tighten to 45Nm or 33ft/lb)
    15. Stabilizer bar (subframe must be lowered to remove and install)
    17. Bolt
    18. Bolt (always replace, tighten to 100Nm or 74ft/lb +1/4 turn or 90 degrees
    19. Front bonded rubber busing for control arm
    20. Bolt (always replace, tighten to 70Nm or 52ft/lb +1/4 turn or 90 degrees
    21. Bolt (always replace, tighten to 50Nm or 37ft/lb +1/4 turn or 90 degrees
    22. Bolt (always replace, tighten to 50Nm or 37ft/lb +1/4 turn or 90 degrees
    23. Pendulum support
    24. Bolts (always replace, tighten to 25Nm or 18ft/lb +1/4 turn or 90 degrees
    25. Stabilizer bar bushing
    26. Stabilizer bar mounting bracket
    27. Bolt (tighten to 25Nm or 18ft/lb
    28. Subframe (if damaged, do not repair threads in sub-frame for front control arm bolt)
     
  29. Prawn

    Prawn My other car is a MINI!!!!

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    Nice one Garry, I'll call the local chinese takeaway tonight:

     
  30. jojo

    jojo Looking for Boost!
    Staff Member Moderator quattro Audi S3

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    There was a slight clucnk on mine going uneven roads Nick, turned out to be a worn steering rod, the play was minimal, but a hunter machine detected it, replaced and no more clunking. Worth a look?
     
  31. Prawn

    Prawn My other car is a MINI!!!!

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    Cheers Joe. I'll check them all out again on saturday when I change the bolts on the front end. it HAS to be something simple!
     
  32. A3-Lee

    A3-Lee Active Member

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    Please let us know the cause whe. You find it mate
     
  33. Prawn

    Prawn My other car is a MINI!!!!

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    Will do mate. as soon as I know!
     
  34. Prawn

    Prawn My other car is a MINI!!!!

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    Cheeky question: Does anyone have a copy of ETKA that could give me part numbers for some of the above?

    Parts, 5, 18, 7, 4, and 20 if at all possible! My local TPS are OK, but prefer part numbers and get angry if I make them search!
     
  35. vroomtshh

    vroomtshh Active Member
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    I'll post them in the morning when I'm at a computer 👍
     
  36. Prawn

    Prawn My other car is a MINI!!!!

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    hero :D
     
  37. Dani_B19

    Dani_B19 Audi-sports own special child.

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    On a side note, the ramp idea didnt work for me, even had it on a mot test ramp with the hydro lift, wasnt until I took them off and inspected them.

    Good shout on the track rod jo.
     
  38. jojo

    jojo Looking for Boost!
    Staff Member Moderator quattro Audi S3

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    A knackered trackrod becomes floppy like the pic below, a good one can hold itself straight in the air. And my one was only 60k miles old.

    [​IMG]
     
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  39. vroomtshh

    vroomtshh Active Member
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    5 - N90752801
    18 - N90734901
    7 - N10262201
    4 - N0150814
    20 - N90484003
    :thumbsup:
     
  40. Prawn

    Prawn My other car is a MINI!!!!

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    What a legend! Thanks so much Garry. I'll get on the phone now :)
     
  41. Dani_B19

    Dani_B19 Audi-sports own special child.

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    Would number 4 be needed for solid mount bushes?
     
  42. vroomtshh

    vroomtshh Active Member
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    Yes, because it's for the wishbone bolt, not the subframe bolt
     

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