Brakes Dragging

[katieloo]

Hello all,
I am the happy owner of a 1983 240 D, manual transmission. I replaced the brake pads a couple of weeks ago after the light came on, and they would make occasional screeching noises, and were kind of spongy when pressing the peddle. After that, when I drove the car I would feel a sort of drag and would occasionally smell burning. My mechanic just replaced the brake lines and, he said the calipers look fine. But the brakes are still dragging. The mechanic loosed a piston near the m/c or booster and it isn't dragging for the moment, but the brakes are spongy again. He said I will need to replace the booster. Does this sound accurate or does it sound more like an M/C problem. FYI I am not loosing or leaking brake fluid. Any advice appreciated!

[Diesel911]

Originally Posted by katieloo

Hello all,
I am the happy owner of a 1983 240 D, manual transmission. I replaced the brake pads a couple of weeks ago after the light came on, and they would make occasional screeching noises, and were kind of spongy when pressing the peddle. After that, when I drove the car I would feel a sort of drag and would occasionally smell burning. My mechanic just replaced the brake lines and, he said the calipers look fine. But the brakes are still dragging. The mechanic loosed a piston near the m/c or booster and it isn't dragging for the moment, but the brakes are spongy again. He said I will need to replace the booster. Does this sound accurate or does it sound more like an M/C problem. FYI I am not loosing or leaking brake fluid. Any advice appreciated!

I don't understand the "loosed a piston" part of the explination?

If you are losing Brake Fluid and there is no external leak loosen the Master cylinder Nuts and Pull the Mastercylinder forward. Stick something or look down in side the Power Brake Booster and see if there is Brake Fluid down there.
If so your Master Cylinder is leaking at the Rear.

If the above is what is going on the Brake Fluid is bad for the Rubber Diaphragm in the Brake Booster.
Some people would replace the Brake Booster and some would not as along as the Booster is still working.

Spoungy Brakes can be Air in the Brakes, Bad Brake Hoses or the Master Cylinder is shot.

When you Booster goes the physical effort you need to barke gets very hard.

Here is a generic Auto Repair Site:
Alphabetical index of problems
http://www.aa1car.com/index_alphabetical.htm

[Codifex Maximus]

Check those rubber brake hoses too. They can expand when you hit the brakes and then, when you let up on brake pedal, try to contract causing continued drag.

One of those great pieces of info I picked up off this site.

[whunter]

Look here for other common issues.

http://www.peachparts.com/shopforum/diy-links-parts-category/142411-brake.html
http://www.peachparts.com/shopforum/diy-links-parts-category/142411-brake.html
http://www.peachparts.com/shopforum/diy-links-parts-category/142411-brake.html



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