Rear brake troubles, Why do they keep locking ? Options

[Thor]

Hello to everyone at 914world.com. I am a new member from Belgium and ready to post my first question ...

Fase 1: Summer of 2003 ... during a saturday afternoon trip, I suddenly felt that when rolling to a stop the car balanced diagonnaly. At a stop I got a burning smell going through my nose and soon discovered the rear left break was smoking and running terribly hot. I got the car home and my mechanic unlocked the brake.

Fase 2: While passing the annual technical control, the mechanic said there was still an imbalance between the rear brakes. So back to the shop (another - VW-Audi based) where I was told the brake pads were gone and they replaced them.

Fase 3: During an orientation rallye in november 2004 the rear brakes started to squeal and the burning smell was back. This time the right rear brake started to lock. A quick repair in a garage where some young mechanics wanted to have a look at it put us back on the road. We had some good moments but at some stops the right brake would still feel hotter then it's supposed to be.

Anyone an idea of what could be wrong ? Calipers are supposed to be replaced before I purchased the car.
What can I do to restore the balance and keep them from locking ?

Thanks guy's ! (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif)

[Thor]

Thanks allready for the many responses !

@bd1308
Are you making an offer for mine or offering one for my car ? Mine is one with two grilles, and since we don't see them very often I want to retain this one. Probably I will have to replace him because the rubber lid is broken as is the base for the lock ... but I'm still breaking down the car, so not in scope for the moment. If you can get a very good one (the same type), I'll get back to you later !

Rebuilding the calipers and stuck pistons: these are "supposed" to be fairly new. They look rather unblemished too. I'll keep this as a last solution.

Replacing the lines: I allready considered replacing them. Would there be a benefit in replacing them with braided ones ?

Venting clearance: I must be honest ... never heared about it. If it's to close would the brakes lock up on one side only ? I'll check this when replacing the lines. I allready got drilled rear rotors in stock. By the way ... a set of two for the rear at 100 Euro, about $ 106, I thought this was a good price ...

As you can see still a lot to do, but not a 10.000 step plan. I'm allready there with the 911. (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) I've got to keep one on the road !

Anyway, I'm delighted to have gotten the tip to take a look at the forum ( thanks to Craig from Camp914). You've got some great stuff going on here !
And thanks to Gint for resizing the picture. I couldn't find the Edit button.