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Old 04-18-2016, 05:10 PM   #1
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Anyone running with a metal impeller water pump?

Finally got some nice spring weather and been re-acquainting myself with my 01s.

Im going to put it up on the lift soon and do a bunch of maintenance of on it.

The current water pump is at least 7 yrs old and has between 40 and 80K miles on it.

A few years ago, I was planning on doing the water pump and never got around to it. I bought a metal impeller Pierburg brand water pump at the time.

It's been sitting on the shelf in my garage since. Now there is Internet hysteria (?!) about catastrophic failures of metal impeller pumps.

I am trying to figure out if I should put this one in, or forkout money for a different plastic impeller water pump.

Peter

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Old 04-18-2016, 05:28 PM   #2
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My pierburg had a composite impellor, is there a chance it is just dark gray composite and looked metal? Post a photo if it is handy.
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Old 04-18-2016, 05:31 PM   #3
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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.
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Old 04-18-2016, 05:41 PM   #4
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A genuine Pierburg WP should not have a metal impeller, the impeller should be dark grey plastic.
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Old 04-18-2016, 05:47 PM   #5
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Jesus christ not again. SEARCH.

And please...don't ask about oil next.
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Old 04-18-2016, 05:52 PM   #6
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My pierburg had a composite impellor, is there a chance it is just dark gray composite and looked metal? Post a photo if it is handy.
I will take it out of the box and take a look. Thx

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Old 04-18-2016, 06:50 PM   #7
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OK. Is this metal or composite. It's a brown color impeller.

Unsealed the box tonight.

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Old 04-18-2016, 07:37 PM   #8
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Get a battery....

.....hook up a positive wire and a negative wire.......
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Old 04-18-2016, 07:45 PM   #9
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You mean test the resistance?

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Old 04-18-2016, 09:37 PM   #10
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That looks like a composite impeller - to be sure just check its resistance with a multimeter. If its the same resistance as touching the multimeter prongs together, its metal.
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Old 04-19-2016, 01:26 AM   #11
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Pierburg has always a composite impellers. And this one is also cheap plastic. So wouldn't fit for me.

Regards, Markus
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Old 04-19-2016, 03:51 AM   #12
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Looks like composite to me, you should be good to go!
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Old 04-19-2016, 06:27 AM   #13
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Great news. My memory was a little foggy. This pump has been sitting on the shelf for maybe 4 yrs.

Yeah, I procrastinate.

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Old 04-19-2016, 07:57 AM   #14
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Great news. My memory was a little foggy. This pump has been sitting on the shelf for maybe 4 yrs.

Yeah, I procrastinate.

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Do you have a new gasket? Some of the water pumps come with a felt or other type of gasket but for this one you want the OEM style metal gasket. If your original water pump is still on the car you will have to trim away the old gasket since it is shared with the oil pump housing. That is one way to tell if you are still on the original water pump when you remove it.

Lots of good details here:

Porsche Boxster Water Pump and Thermostat Replacement - 986 / 987 (1997-08) - Pelican Parts Technical Article

If you are down there it is a good time to replace the thermostat too.

Good luck with your project!
Steve
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Old 04-19-2016, 09:35 AM   #15
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OK. Is this metal or composite. It's a brown color impeller.
Do you have a magnet?
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Old 04-19-2016, 09:36 AM   #16
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Magnet doesn't work on the housing or impeller. Definitely non-ferrous

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Old 04-19-2016, 12:17 PM   #17
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Jesus christ not again. SEARCH.

And please...don't ask about oil next.
Wow, some of you guys are brutal! Maybe you would be more at home over at Rennlist??
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Old 04-19-2016, 03:40 PM   #18
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Wow, some of you guys are brutal! Maybe you would be more at home over at Rennlist??
Getting the same threads within a week of each other, almost to the letter, is brutal. It's common forum etiquette on every forum I've ever partaken in. Use the search function first. If you think I'm brutal you need to get some calluses.
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Old 04-19-2016, 05:12 PM   #19
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Getting the same threads within a week of each other, almost to the letter, is brutal. It's common forum etiquette on every forum I've ever partaken in. Use the search function first. If you think I'm brutal you need to get some calluses.
You're the one swearing away and you are going to lecture on forum etiquette? And if you are all concerned with getting some calluses, maybe you should take your own advice and grow a calluse about all these same threads.
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Old 04-19-2016, 05:37 PM   #20
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You're the one swearing away and you are going to lecture on forum etiquette? And if you are all concerned with getting some calluses, maybe you should take your own advice and grow a calluse about all these same threads.
Swearing away? If what I've said offends you, you should really stay off the Internet. Or for that matter don't leave your home.
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