Anyone running with a metal impeller water pump?

[petee_c]

Originally Posted by NewArt

Really Peter, you should read the sh**load of posts on this forum about this. Search metal impeller.
Enough can already go wrong without gambling.

Well, I've been on here on and off since 2007,and bought my car in 2009.

I did search about the different types of water pumps, and thought I had bought a metal impeller version back in 2011/12.

Turns out I didn't.

That being said, I did inquire about the life of a metal impeller pump and was going to base my decision on whether I used one on how much useful life I thought I could get out of it. Say if I had a sample size of 10-20 real posters here on 986forum, rennlist.com, or renntech or pedrosboard.com that said they got XX, 000 miles out of their pump before they replaced it, then I might consider putting it in for 60% of that life if I could get 2-3 yrs out of it.

Or if I had 2-3 people that said they got YY, 000 miles out of their pump before failure, I might go with 40% of that number again if it lasts me 2-3 yrs of projected driving life.


I didn't find either of those numbers.

I don't mind wrenching on the car. The roads around here are boring, straight although being rural, there is plenty of opportunity to wind it up a bit as the police presence is scarce. However, I've got 2 young kids and 1 wife, and only 1 passenger seat, so if I'm wrenching at least I'm at home with them and spending quality time with the boxster.

My car is a fair weather car only from April to early November.

I'm not rich enough to just throw out a part willy nilly without trying to figure out if I can get some life out of it. I guess I could have put it up on eBay and recouped some money that way.

These cars have been around for almost 20 yrs now. There really isn't a whole lot new to discuss. This is the same with all 986 related boards. The trends repeat themselves over and over.

The typical life span of a water pump still is an unanswered question in my research. I believe porsche intended it to be a lifetime part according to their maintenance schedule. We are now away from that view.

My current pump might be original, and might be 15yrs old with 124,000km on it. Never topped up the coolant in the past 7yrs. It's coming out this spring and I'm going to put in this brown composite impeller pump in. No idea how long this current pump will last, all my other vehicles have had timing belts and the pumps got replaced before failure when I replace the TBs at around 120,000km.

Peter

PS. I don't mind a good oil discussion.


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[steved0x]

Originally Posted by petee_c

The typical life span of a water pump still is an unanswered question in my research. I believe porsche intended it to be a lifetime part according to their maintenance schedule. We are now away from that view.

I can give a data point - I replaced my water pump proactively (there was nothing that appeared to be wrong with it and no leaks) in January 2015 at 115,000 miles (car is a 2000 so 15 years old). It turned out to be the original WP still, and it wasn't wobbly but the bearing was rough when I spun the WP by hand. The new one was silky smooth.

Jake Raby recommends replacing every 3 years regardless of mileage in this rennlist thread (kind of old so he may have updated his guidance since then)