while i have used a number of rebuilt waterpumps in the past, and not had any issues with them. there are pros and cons to both
in a rebuilt waterpump they are fitting components into a casting that has been heat cycled countless times. this changes the properties of the pump in such a manner that the new components may or may not stay put.
in a new pump, the components are more likely to be more tightly pressed.
in a used pump, the materials are less likely to change right after installation than in a new pump.
in a used pump fitment is hand checked on an item by item basis. on a new pump they might just be spot-checked.
a new one isn't that much more money, and you have the benefit of recourse with a new pump that you don't usually have with a used one. it is a lot easier to point to the pump as a failure when it is new than when it is used. it shouldn't be, but it is.
tough call. i bought a new one when i changed mine.
either way, just make sure it's the right one. there are 2 types of impellers out there, and one of them is known to have occasional issues. there is another thread here about that.
94 Midnight Metallic Blue Cab Porsche 968 w/deviating cashmere/black interior and WAY too many mods to list - thanks to eric for creating
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"It isn't nearly as expensive to do it right as it is to do it wrong."
