MyE28.com

My 79 euro 645 has 4 pot ate calipers on the front, with a vacumn booster.I had a problem with the driver front caliper sticking and dragging , getting hot, so I replaced them with rebuilt calipers. Now I've got the same problem. Even a short drive is enough to cause the wheel to drag causing a shimmy and motor temp rises.
I came home today after short drive and jacked up front wheel, it was locked up, so i cracked open the bleeder on caliper, it's still locked up with bleeder open. I wait 1 hour for it to cool off and brakes are free, no drag at all.So I was thinking that if the problem was in master cylinder or booster, cracking open the bleeder would release the pressure and free up brakes, but no difference. I can't believe the newly rebuilt( from professional rebuilder) caliper is the problem, It was the same wheel before the new calipers. The brake hoses were replaced about 2000 when I got the car,and show no signs of collapse or kinks.
any thoughts appreciated!
marc

Well it turned out to be the rubber brake hose. I've heard of this before, but kinda thought it was urban legend. The hose shows no sign of problem on the outside but even 120 psi won't pass thru. So this time I'll get s.s. braided lines. What a pita job! I remember when I first resurrected this car in 2000, brake hoses were one of the first projects, so I've spent the last 17 years trying to get this car to look good and run good at the same time,and have yet to accomplish that goal.
Now I'm starting over at the top of the list again.
I'm beginning to question the feasibility of ever getting this car 100%.