[Vwdiesel] Weird brakes

[Erik Lane]

My brother is having an odd problem on his rabbit, and I don't know what to
tell him.

His brakes will work fine for anywhere from 20-50 miles, but then slowly
build up pressure until the car wants to stop. If he opens the two nozzles
on the sides of the master cylinder the pressure releases and is then fine
again for a while. This happens over and over. He recently put a new master
cylinder and one new brake line on the car, and afterwards is when this
started.

My opinion is that the new master cylinder is somehow faulty, but I really
don't know. This is a strange one that I haven't seen before. Does anyone
else out there have any ideas?

Thanks!
Erik