I just bought a 2.4L water pump off of Ebay. It came in a AC Delco box, but i think the guy swaped out the AC one with a Re-man one. It didnt come with any gaskets in the box and it doesnt say AC Delco anywhere on the pump, All there is, is a date stamp that reads 10:20 06/16/00. And the number W 2426 on the front chain driven pully. Can anyone tell me if this is a New Water Pump from AC Delco. i would like to know for sure before i complain to the guy.