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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 08-12-2011, 06:19 PM
Schitzo Schitzo is offline
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Help Identify This Water Pump

I cant seem to find an identical water pump. Its not a Hepu,Graf or Bosch. It obviously isn't a Stewart pump. The only marking on it are the numbers 10/15/09 which I assume is a date.

The impeller is metallic and appears to have been cast. Thanks








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  #2  
Old 08-12-2011, 06:36 PM
Joe@Bavarian Joe@Bavarian is offline
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looks like a M52 water pump if that is what you're asking?
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Old 08-12-2011, 06:52 PM
Schitzo Schitzo is offline
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It is out of a M54. I guess should have been clear. What brand is it?
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Old 08-12-2011, 10:09 PM
granlund granlund is offline
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Looks like a Geba, but the cast impeller is usually machined.
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Old 08-13-2011, 07:01 AM
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bluebee bluebee is offline
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There is a list of the 'common' BMW water pumps here:
- What brand of waterpump to buy (1)

Quote:
BMW E39 Water Pump Suppliers:
--- top tier (I think) ---
1. Stewart EMP (some say they beef up the bearings to handle the metal)
2. Hepu (Cam likes em but I don't know much about 'em)
3. Geba (heavy cast metal impeller, bearings sometimes fail)
4. Graf welded steel impeller (better but also occasional bearing failure)
5. GMB (I think this is OE with composite plastic impellers???)
--- lower tier (I think) ---
6. Hella (I think this is OEM with composite plastic impellers)
7. Bosch (I don't know of any users who reported back on these)
8. Beck Arnley (they sell 'em but I don't know anyone using them)
9. Airtex (again, they sell 'em, but we'd have to hear from users first)
10. AC Delco (same as the last two above, they sell 'em)
11. A1 Cardone (they sell 'em, don't know much about 'em)
12. ??? please correct this list as needed so we all benefit ???
So, it's 'probably' one of those.

I looked at the half-dozen pictures in that thread but it's hard to tell which one is the cast one shown in the OP.
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Old 08-13-2011, 07:37 AM
cn90 cn90 is offline
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I believe both M52 and M54 motors use the same WP.
It is Geba in that picture.
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Old 08-13-2011, 08:12 AM
Schitzo Schitzo is offline
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Quote:
Originally Posted by granlund View Post
Looks like a Geba, but the cast impeller is usually machined.
thanks

Quote:
Originally Posted by bluebee View Post
There is a list of the 'common' BMW water pumps here:
I looked at the half-dozen pictures in that thread but it's hard to tell which one is the cast one shown in the OP.
Thanks for the link. Very helpful

Quote:
Originally Posted by cn90 View Post
I believe both M52 and M54 motors use the same WP.
It is Geba in that picture.
Thanks. I does indeed look like a Geba with the exception of the non-machined impeller as mentioned above.


Now onto choosing what brand to go with
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  #8  
Old 08-13-2011, 09:00 AM
cn90 cn90 is offline
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Year #5 on Hepu here.
Zero issues.
The Volvo people use HEPU (instead of Aisin WP) because Hepu is cheaper and it is as good as Aisin (which is Volvo and Honda OEM WP).
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