Hot rear brake disc - A4 - B7

[quattroorcooper]

2.0T A4 B7 Quattro

Hi everyone, hopefully someone can shed some light on my brake issue.

My rear left brake has been getting hotter than the other 3.

I have replaced the slide pins, the discs, pads and have put on a new caliper.

Brakes have been bled.

But it still appears to be much hotter than the other 3 after a drive.

What more can it be?

[Gazwould]

Caliper piston , clean , or renew , grease and new seal kit .

[zollaf]

hes had a new caliper

[rowdy-999]

Faulty flexi?

[quattroorcooper]

Yip new caliper fitted yesterday.

I first noticed 2 weeks ago when i heard scraping from the brake. on inspection the rear pad was worn to the backing plate. Though not evenly, was worn on an angle.

I fitted some new pads and suspected the slide pins had seized, so replaced them too. think that was the problem solved.

A couple of days later i noticed that the brake was hot again. So I ordered news discs think the old one could be warped. And i ordered a new caliper, since I new that side was original (all others had been changed).

Funny when i took the 2 week old pads of yesterday they were again worn uneven at an angle.


How would the flex pipe cause this?

[zollaf]

flex pipe can delaminate internally and act as a one way valve. to test, jack up and remove wheel. press brake pedal really hard. wheel should spin easily as soon as pedal is released. get a helper to do the pedal. if the wheel doesnt release, crack open the bleed nipple. if you get a sudden release of the brake then its probs the flexi keeping pressure in the caliper. you can confirm by again pressing the pedal and this time cracking off the joint the other side of the flexi from the caliper. if nothing happens and wheel stays tight then you have it cracked.

[quattroorcooper]

flex pipe can delaminate internally and act as a one way valve. to test, jack up and remove wheel. press brake pedal really hard. wheel should spin easily as soon as pedal is released. get a helper to do the pedal. if the wheel doesnt release, crack open the bleed nipple. if you get a sudden release of the brake then its probs the flexi keeping pressure in the caliper. you can confirm by again pressing the pedal and this time cracking off the joint the other side of the flexi from the caliper. if nothing happens and wheel stays tight then you have it cracked.

Great!

I guess i can try a similar test with the handbrake.

[zollaf]

you could, that would rule out a sticky handbrake cable which is another option.