The rivet that the arm pivots on gets corroded and binds and overpowers the spring. I used PB blaster to get rid of the corrosion then re-oiled well and solved the problem. You need to wash rinse and repeat occasionally.

__________________
2001 x5 3.0 (sold with broken motor), 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed,