[chevmn]

These are rebuildable, and kits very reasonable. The only special tool is to pull the pulley, and available for "loan" at most parts stores. I was going to rebuild one recently, but found the shaft and bearing was very worn. someone had ran the pump dry, and kept running apparently, but I found a used one at a swap meet. There are some you tube videos on the rebuild. In case you want to tackle and save a few $$ like me, and avoid some of the junk rebuilts.