OK, last week I had a problem where after a few km of driving, the rear passenger side rim became very hot. Not too hot to touch, but hot whereas the other 3 were cold (I live in Vancouver and it's been minus 4 or so for the last week). I took it to a local "brake specialist" type shop, who did a brake inspection and determined it was the caliper (I have had experience with them in Ontario and had nothing but good work). Charged me to replace that caliper, machine the rotors and new pads (pads under warranty). Back to September 16th of this year, the caliper on the drivers side seized, same chain replaced that caliper, pads on both sides and no problems since. To put this in perspective, I have had so far:

Rotors on both sides.
Pads on both sides.
Calipers on both sides.
Some sort of mounting pin on the drivers side (immaterial I think, but I'll throw it in anyway).

When I had it in the shop, I was told I needed both rear calipers, rotors machined and pads. I've had one rear caliper (I should have done both, it's a money thing or I would have) so I could buy the one that's binding needing to be replaced. A new drivers side caliper in a little more then 3 months?

Today I went to drive the car, rear passenger side had completely seized. I got a block on a side street in the snow trying to release it and I couldn't, so I parked the car as I figured I'd do more harm then good and left it at 2pm. One thing to note is that there seemed to be an awful lot of free travel in the parking brake, as if it's not engaging the brakes at all.

Around midnight, I tried again and it's now fine.

Obviously I don't want to take it in under warranty so they can tell me it's the master cylinder ($500 please!), but they did the passenger rear less then a week ago and I've barely done 100km. Another thing I should point out is that they clamped the brake line.

Is it possible, since I'm sure it's a reinforced brake line as opposed to a piece of rubber, that the clamp has damaged the line on the side they worked on and brake fluid doesn't flow back into the master cylinder?

Any advice gratefully received.

Cheers

--Graham