On my 94ATX,the pulley on the serpentine belt tensioner (between the PS pulley and the crank pulley) is chirping like a canary. If I put a little grease on my finger and rub in onto the surface of the bearing it quiets down for a day or so and then returns. I have another pulley to put on, but when I put a 17mm wrench on it and torque it clockwise I can't budge the tensioner to loosen the belt. What am I doing wrong? How much force do I need to exert to take the tension off the belt? I am just using a closed end 10" wrench.