The Red C5 S6 Build

A6 All/ S6 All
#1

Just thought I would share my progress.
Here is where it started…

http://audirevolution.net/addons/albums/images/477753412.jpg


http://audirevolution.net/addons/albums/images/812056982.jpg


http://audirevolution.net/addons/albums/images/617436784.jpg


http://audirevolution.net/addons/albums/images/681554474.jpg


http://audirevolution.net/addons/albums/images/702164666.jpg


http://audirevolution.net/addons/albums/images/999278667.jpg

I am going to either cut out or replace my cats soon as well as modify the doors.

#2

She’s a beaut, Clark!

#3

I have a thumping sound under hard acceleration is there anyone familiar with this? Is it the bearing support or the tail shaft of the trans?

#4

Can you feel it in the steering wheel or feel it under your feet.

#5

Does it happen mostly when you hit the gas from a dead stop? Or does it also happen at speed?

I’m driving a borrowed Mercedes ML55 AMG right now, and it has a serious CLUNK sound that happens whenever I hit the gas hard from a stop. It sounds like something in the front suspension is loose. Wonder if it’s the same thing.

#6

Are you selling it or did you just buy it?
http://m.cars.com/vehicledetail/#vdp?listingId=674706823

#7

I bought it in March and have decided to keep it. I like it more than the allroad and have decided to just bite the bullet and take the loss on the allroad.

As far as the clunk it is only from stop to acceleration and it is a sound coming from the body/driveshaft not suspension. I just cant tell if it is from the center support or the driveshaft itself.

#8

Awesome car!

I have owned three C5 4.2 cars, and all of them had the center driveshaft support bearing go, producing the symptoms you describe.

I investigated a single piece driveshaft replacement, at one time. If I was going to invest in one of these cars now, that is the route I would go, and fix the problem once and for all. Apparently, the aftermarket center support replacements dont last long.

#9

I am fairly certain that the thumping is the cv’s at either end of the shafts. I will be inspecting the center support when I remove the shaft. Just waiting to finish up the allroad timing chain then the S6 will move into the garage. It’s getting to be a full time job maintaining these 10+ year old Audi’s.

#10

My cats are gone. Is there any sense in using aftermarket cats?

#11

The question is, Why wouldn’t you go aftermarket?

#12

Honestly no. The pre cats on these cars just cause issues and overall the V8 cars love to have a free flowing exhaust.

#13

Anyone know if this would cause emissions issues anywhere? For example, my home state of CA where we have to have our cars SMOG tested every 2 years? I’d love to do some cat removal someday

#14

Your car is AWD so they dont put them on the rollers if they even still do that out there in CA. I think most places in CA are going to OBDII emissions testing where they plug in to the data port and check for readyness.

If you pull out your cats your cat test in the cars readyness function wont work and that would get you to no pass CA emmisions. Now the company that tuned your car would be able to help you around that but you would have to talk to them about that. Either way your going to need them to help you with the ECU if you do pull the cats

#15

For the clunk you mentioned, I would check the motor mounts.

#16

I will, is there any way to know for sure its the CV’s on the driveshaft before I remove the damn thing?

https://www.europaparts.com/media/catalog/product/cache/1/image/cd6085ca2ccd08373d4b6de971808fb4/8/9/893521100.jpg

#17

Anyone?