Tip - How to Change a Ford Aerostar Serpentine Belt | eHow

The serpentine belt on your Ford Aerostar is a long belt that powers all the accessories on the van. An auto tension pulley applies tension to the belt. Check your Aerostar's serpentine belt every 60,000 miles for wear. Any sign of fraying or damage to the belt or belt teeth indicates that you must replace the belt. You can buy replacement...