I'll try to make a long story short. I had the serpentine belt replaced on my 99 xj sport. And since I've got it back its been nothing but problems. It squels like a pig then after a while goes away. the first time i was getting check gauges and my Temp would spike...took it back and had thermostat replaced. good so far on that one. Now got it back, was ok for like 2 days and is now squelling like a pig again and now i get check gauges and no voltage. Any ideas?