grifrowl
06-05-2015, 02:16 PM
I recently pillaged a b6 s4 at my local self-pull junkyard for some quick to get "s" car parts at a very low price. The brakes on my b5 a4q happened to be at the end of their lifespan anyway and terrible even when new, so that naturally was the first thing I concentrated on.
I have no real interest in using 18in wheels, so first up the front calipers got sold off for some funding.
I grabbed some early Porsche Cayenne front calipers from a fancier junkyard and MB C230 sport discs from Napa instead as they fit under 17in wheels easily (and they look awesome). I won't go into this much as it's been well covered elsewhere, but I ended up getting spindles from a junkyard b6 and new front control arms (which i needed anyway) to make this happen.
The b6 s4 rear calipers seem to be shared by a few other models in the audi lineup, and are easy to find on the used market or even at a local autoparts store.
The first thing I did was blast and paint mine, to get rid of the accumulation of brake dust and rustiness. Then a few coats of caliper paint. I got replacement dust covers and seals for fairly cheap and rebuilt them.
http://i.imgur.com/lI5ukTo.jpg
To space the caliper correctly for the b6 300mm rotors, some spacers of about 8.5mm and hardware ~10mm longer (m10*1.25*50mm, m10*1.25*75mm) are needed (class 10.9 or 12.9).
Mine look like this.
http://i.imgur.com/ennZ0Zp.jpg
Lines that adapt from m10*1mm brake fitings to m12*1mm on the caliper are required. I had stainless lines that used m10*1 banjos, so I had to find 10female-12male adapters at Napa, and they needed to be turned a little to make sure the JIC nipple of the fitting sat properly in the caliper.
http://i.imgur.com/pbDUU0M.jpg
Another modification that needs to take place is the parking brake cable brackets. For that I used a 1/4in drillbit and two m6*1*10mm hex head bolts (8.8 or a2 is fine, but don't get a socket cap screw). The rotating arm from the caliper needs to get pressed off after the bolt is removed, and the stationary arm needs a hole about halfway between the original hole and the one the bolt is threaded into in the picture (I screwed up).
http://i.imgur.com/13GKHzm.jpg
[cool]
I have no real interest in using 18in wheels, so first up the front calipers got sold off for some funding.
I grabbed some early Porsche Cayenne front calipers from a fancier junkyard and MB C230 sport discs from Napa instead as they fit under 17in wheels easily (and they look awesome). I won't go into this much as it's been well covered elsewhere, but I ended up getting spindles from a junkyard b6 and new front control arms (which i needed anyway) to make this happen.
The b6 s4 rear calipers seem to be shared by a few other models in the audi lineup, and are easy to find on the used market or even at a local autoparts store.
The first thing I did was blast and paint mine, to get rid of the accumulation of brake dust and rustiness. Then a few coats of caliper paint. I got replacement dust covers and seals for fairly cheap and rebuilt them.
http://i.imgur.com/lI5ukTo.jpg
To space the caliper correctly for the b6 300mm rotors, some spacers of about 8.5mm and hardware ~10mm longer (m10*1.25*50mm, m10*1.25*75mm) are needed (class 10.9 or 12.9).
Mine look like this.
http://i.imgur.com/ennZ0Zp.jpg
Lines that adapt from m10*1mm brake fitings to m12*1mm on the caliper are required. I had stainless lines that used m10*1 banjos, so I had to find 10female-12male adapters at Napa, and they needed to be turned a little to make sure the JIC nipple of the fitting sat properly in the caliper.
http://i.imgur.com/pbDUU0M.jpg
Another modification that needs to take place is the parking brake cable brackets. For that I used a 1/4in drillbit and two m6*1*10mm hex head bolts (8.8 or a2 is fine, but don't get a socket cap screw). The rotating arm from the caliper needs to get pressed off after the bolt is removed, and the stationary arm needs a hole about halfway between the original hole and the one the bolt is threaded into in the picture (I screwed up).
http://i.imgur.com/13GKHzm.jpg
[cool]