well this is a problem that doesnt relate to my car but my moms escort (yes we drive simular cars :-o) well anyways about every month her belt always slips off and really gets my thinking…why does it do that?
We talked to a mechanic and said something about a oil leakage and it was spitting out oil onto the belt but then about 3 weeks later the belt slips off agian :x
so im thinking that was not really the problem…the belt is like 3 months old and has been doing that every month for the last 4 months so any ideas??? 
It could be the tensioner, or the belt. Either the tensioner isn’t putting enough pressure on the belt, or the belt’s too long or stretched.I would consider buying a new belt, make sure it’s the one for A/C if she has it, and not if she doesn’t. If that doesn’t fix it, I would think the tensioner may need to be fixed…
alright that makes more sense than what the mecanic said 
thanks 
I would be willing to bet on the tensioner… especially since the belt is only 3 months old.
Yes Mark, but if it’s the wrong belt… If she has A/C it’s probably the tensioner, but if she doesn’t, it could be the belt…emphasis on could.
well i tried to tighten the tensener but it would no budge it just made that pulley go up and down… :?
maybe the belt is streched out, also i noticed a large amount of antifreeze on the ground under my moms car…unfixable for me? mecanic needed? 
Well…you could find the leak and decide from there… The coolant could possibly be the reason the belt’s slipping off.