Sander_Baas

Hello,

I decided to ask GEBA if it has a metal impeller and if they are planning on a plastic one below the mail I’ve send and the answer I received:

Sehr geehrter Herr / Frau

Ich bin im Besitz eine Youngtimer Porsche 928 für mein Auto Ich suche nach eine neue Wasserpumpe.
und kam ich zu einer GEBA Wasserpumpe (GEBA Nummer: 15010)

Aber nach der "community", hat diese Pumpe jedoch ein Flügelrad aus Stahl. Dies könnte ein Problem sein, dass im Laufe der Zeit, kann das Anliegen gegen den Motorblock. Und das bringt eine Menge Schaden.
Eine Lösung, die Porsche hat in dieser Zeit eingeführt würde eine Kunststoff Flügelrad sein.

Können Sie mir sagen, was für Flügelrad der GEBA Wasserpumpe hat mit die Nummer 15010?
Nach Angaben der "Gemeinschaft" in den USA sollte das ein Stahlen Ausführung haben würde,

können Sie oder haben sie auch planen, eine Version mit einem Kunststoff Flügelrad zu machen?

Vielen Dank im Voraus
Sander Baas

Translated in to:

I have a Porsche 928 and am looking for a new water pump, I found a GEBA water pump with number: 15010

But according to the community this pump has a metal impeller. This could be a problem because this impeller can “eat” its way in to the engine and cause severe damage.
A solution Porsche implemented at the time was a plastic impeller.

Could you tell me what for impeller the GEBA pump has with number: 15010, according to the community this should be a metal one.

Can you or do you already have plans to make a version with plastic impeller?

Answer:

vielen Dank für Ihre Mail.

Zur Zeit planen wir nicht unsere Pumpe mit einem Kunststoff Flügelrad zu produzieren.
Wir persönlich arbeiten nicht sehr gern mit einem Kunststoff Flügelrad, da diese sich schon mal von der Lagerwelle ablösen.

Bei unseren Wasserpumpen haben wir noch nie Probleme mit dem ablösen von Flügelrädern gehabt!

Für weitere Fragen stehe ich Ihnen jederzeit zur Verfügung

Mit freundlichen Grüßen
GEBA-Autoteile GmbH

Translated in to:

Thank you for your email

Anytime soon we are not planning to make a pump with a plastic impeller
Personally we do not like to work with plastic impellers, because these often separate from the shaft

With our water pumps we never encountered any problems with impellers that get loose

If you have any further questions, you can always ask them.

ROG100

It would appear that they have only been making the 928 WP for about 1 year and few are actually in service. Porsche changed to plastic for a very good reason as did Laso after some cajoling from the 928 community.
I will bide my time and judge by actual use - time/mileage. Ask again in four years or so.

ROG100

I called and spoke to Frank Herrman GM of GEBA. Seemed interested in what I had to say but the language difference got in the way of the technical detail - my lack of German.
I will write in detail to him and ask a number of questions and see if we can get some answers.

mickster

"Bei unseren Wasserpumpen haben wir noch nie Probleme mit dem ablösen von Flügelrädern gehabt!"

With our waterpumps we never have had problems with detached impellers!

Use of the exclamation mark--my 2 years of high school German show him to be almost insulted. It's used as an imperative.


Thank you Sander for inquiring with them!

GregBBRD

It's all about how tight the press fit is. Perhaps they have figured out what is required.

Indeed, the plastic impellers are molded around a bushing with knurls on it (much like the infamous gas tank fuel pump inserts in our 928s) and are known to "spin" on the bushing.

Once Laso fitted the "bushing" on Version 2, which increased the press fit, I had no problems with their pumps....none.

If they had only externally identified their different versions, one could relax and leave well enough alone. However, since they did not, the only conscientious thing to do is to remove the pump and look at what version it is.

Sander_Baas

Indeed mickster using an exclamation mark in German usually means a lot :-)

I'm curious to your questions Roger
And the answers he will give. I think its a small but serious company.

Sander

ROG100

Sander - I may send my communication to Schocki and get him to converse with Herr Herrman in German so there are no miss communications at all.
I will share all questions and answers here.

ROG100

Classic - happens to me all the time 8>)

ROG100

So I have a GEBA here in my fat hands. Seems well built. Appears to be a "sand casting" by the surface texture and is marked with the following ---
15010-3
15011-3
Germany

On the pulley, which is silver in color - GEBA - Made in Germany / 12-14

So we should be able to distinguish this WP from other makes.

Has a weep hole at 4.00 O clock behind the pulley.

I will post pictures later.

GregBBRD

Sounds like I should buy a GEBA and tear it apart, to see how good the pieces and the clearances are. Might turn out to be a great solution.

I actually prefer the metal impellers on really quick reving engines. The plastic ones can spin on the bushing.

hacker-pschorr

Thank you, thought I was hallucinating.....I could have sworn there were past threads talking about that being a possibility with plastic impellers. I've been trying to find them.

Sander_Baas

Roger, that's fine. I anyway meant I'm honestly interested in your questions. (also from a technical point of view) that schocki does the translations is fine. better that a native German does it then a Dutch guy

daveo90s4

If the impeller had vanes in the other direction ( think pusher propeller'd plane rather than puller propeller'd plane) then wouldn't it a) still pump efficiently and b) exert thrust so as to push home on the shaft and away from the block?

Dave

Schocki

I already talked to them before Christmas 2014 and gave them time to talk to the management. Their answer was exactly the same on the phone. Right now they are not interested in plastic impellers.
According to them all of their pumps use metal impellers and show no signs of problems.

http://geba-autoteile.de/no_cache/pr...ction%5D=index

Vilhuer

Tell them 928 owners are stupid and want plastic no matter what. They are even willing to pay more for plastic which is properly held in place like last Laso version. Some people rather pay 1000 euros for new Porsche pump than use any metal impeller version. That should drive importance of this issue home to them.