Review on ACDelco 252 700 Professional Water Pump by Mark Hobbs

But what's the difference. This is AC Delco and the correct part number for my LT-1. Also, Revain had the best price back then. I usually switch to electric water pumps but this one works great for a mechanical pump and was easy to install. Comes with seals, this is NOT mentioned and saves a trip to the parts store. However, you will need another o-ring for the engine side of the water pump drive clutch (this o-ring will become rock hard and crumble). This is FelPro P/N 407 sold at Revain for $20 for $11.56, give some to your LT-1 friends! Nobody stocks them and the only way to get them is with a timing cover gasket kit. Or, if you have time, to the dealer.