drivers side brake nosie

i got a 99 cavalier with 2.2 and rear drums the cars got 30,000 miles on it and for the past 2 weeks there has been a clcicking nosie when i let of the brakes. i toke everything apart and saw that one of the return sprins is hitting on the wheel clinder piston and is even chiping the piston. the car stops fine but its my moms car and the nosie boters her lol has anyone ever had this problem and know how to fix it

This is what it should look like. Hope this helps:grinyes:

http://i183.photobucket.com/albums/x184/Nocturnal2010/0900823d801abcca.gif

also the brakes are grabing

Check the drum. It may be warped, out of round. It happened to me. I replaced it and no more grabbing, clunking noise.