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Murray notes a likely suspect. It's always helpful to know the model and year of Alfa. On the other hand, several generic causes come to mind, including the MC.
These are not listed in order of importance:
1. Rotors. Are they warped? Put a dial indicator against them and see. A warped
rotor will push the pads into the caliper and they won't come out until you tap the
brakes.
2. Master cylinder leaking internally
3. Loose wheel bearing. Same effect as #1
4. Sticking caliper piston(s)
5. Air in the lines. Use a pressure bleeder to suck fluid through the lines, rather than
using the normally reliable pump the pedal method.
6. Depending on your car and how the linkage is connected to the brake master,
it could be worn linkage and pin, which allows slop in the pedal. This car sounds
like it has a more extreme problem, though.
7. Flexible brake line collapsing internally.
What else am I missing? I hate working on brakes and can only recite the above from my own, sad personal experience, gained while trying to hunt down a similar issue with my GTV.
__________________
Gary Williams
Washington State
'67 GTV
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