high labor for water pump/thermostat?

[bobaachaar]

damn. i know they used OEM coolant, because i watched him put it in. i also know that the original water pump has a plastic impeller, and 2 of the blades were broken. mechanic said that they're still somewhere in the system, but that it shouldn't be a problem.

i'm not the most handy person in the world, but i would have done the job myself if i had a garage.

live and learn i guess. also yes, i am in the bay area

[bobaachaar]

didn't specify, the brass one is the new one that he put in. don't think it's OEM but the impeller is a more durable material.

[Frodo]

Originally Posted by bobaachaar

didn't specify, the brass one is the new one that he put in. don't think it's OEM but the impeller is a more durable material.

Careful what you wish for..

Common wisdom around here is that "more durable" impeller fins end up chewing away at things you don't want chewed up if/when the pump eventually fails. Recommendations seem to be to avoid them. Should be functional, I would think, but this is probably an item you'd want to preventatively replace before it even thinks about failing..

[JFP in PA]

Originally Posted by bobaachaar

didn't specify, the brass one is the new one that he put in. don't think it's OEM but the impeller is a more durable material.

Mistake. The factory impeller is plastic for a reason: all pumps wear and begin to wobble, when they do, the plastic impeller hits the rear of the pump housing and breaks off, but the metal impeller starts grinding away the rear of the housing, which is part of the engine case, filling the system with metal filings and increasing the distance between the impeller and the case to the point it reduces coolant flow. This damage cannot be repaired, and why the factory uses composite impeller pumps.............

[bobaachaar]

Originally Posted by JFP in PA

Mistake. The factory impeller is plastic for a reason: all pumps wear and begin to wobble, when they do, the plastic impeller hits the rear of the pump housing and breaks off, but the metal impeller starts grinding away the rear of the housing, which is part of the engine case, filling the system with metal filings and increasing the distance between the impeller and the case to the point it reduces coolant flow. This damage cannot be repaired, and why the factory uses composite impeller pumps.............

what do i do? the mechanic replaced it with brass without asking which one i wanted. do i go back and ask to replace with oem?

[JFP in PA]

Originally Posted by bobaachaar

what do i do? the mechanic replaced it with brass without asking which one i wanted. do i go back and ask to replace with oem?

That is totally your call, I am only telling what I know from years of working on customer's cars, seeing what works and what doesn't, and communicating with Porsche engineers. How you proceed is up to you............

[bobaachaar]

Originally Posted by JFP in PA

That is totally your call, I am only telling what I know from years of working on customer's cars, seeing what works and what doesn't, and communicating with Porsche engineers. How you proceed is up to you............

do you think if i leave it and replace it after 40-50k miles it should be fine?

[JFP in PA]

Originally Posted by bobaachaar

do you think if i leave it and replace it after 40-50k miles it should be fine?

No idea. But this is what kind of damage metal impellers cause when the blades hit the case: