Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

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

Reply
 
Thread Tools Display Modes
  #1  
Old 09-03-2009, 01:58 PM
doru's Avatar
doru doru is online now
Officially Welcomed to the 'Fest
Location: Calgary
 
Join Date: Sep 2007
Posts: 4,428
Mein Auto: 2003 530iA
Hepu vs. Stewart waterpump

Is that huge difference in $$$ worth it? (Stewart claims 20% more flow).
Or only for a SS application only? (the Stewart)

Thx
__________________
Looking for a DIY? Parts? Check this out, it might be your ticket
TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39, e53, e46 & Tribby
Reply With Quote
Ads by Google
  #2  
Old 09-03-2009, 02:03 PM
Jason5driver's Avatar
Jason5driver Jason5driver is offline
Officially Welcomed to the 'Fest
Location: Middle of a corn field
 
Join Date: May 2007
Posts: 4,449
Mein Auto: E39 hamster w/ pin-wheel
I just know that I am getting an EMP Stewart WP...
__________________
Reply With Quote
  #3  
Old 09-03-2009, 07:27 PM
oembimmerparts oembimmerparts is offline
'Fest Sponsor
Location: San Antonio
 
Join Date: Jan 2007
Posts: 1,526
Mein Auto: 2001 Z3
On a street use only application you are paying for the peace of mind of not having it ever fall apart due to bearing failure. You will not see any advantage to the increase in flow if your car is a daily driver but as I stated you will never have to mess with the pump again( good thing if you drive a ton of miles or plan to keep the car long term)

Max
__________________
Reply With Quote
  #4  
Old 09-03-2009, 08:11 PM
dalekressin's Avatar
dalekressin dalekressin is offline
Officially Welcomed to the 'Fest
Location: Oshkosh Wisconsin
 
Join Date: Sep 2008
Posts: 5,993
Mein Auto: 2010 M3
I have a HEPU water pump comming Fedex Tomarrow or Monday.
Reply With Quote
  #5  
Old 09-03-2009, 11:34 PM
ganesht's Avatar
ganesht ganesht is offline
(oOO)\(lll)(lll)/(OOo)
Location: san diego
 
Join Date: Sep 2008
Posts: 1,566
Mein Auto: 98 528i 5 speed
Quote:
Originally Posted by oembimmerparts View Post
On a street use only application you are paying for the peace of mind of not having it ever fall apart due to bearing failure. You will not see any advantage to the increase in flow if your car is a daily driver but as I stated you will never have to mess with the pump again( good thing if you drive a ton of miles or plan to keep the car long term)

Max
ditto one less thing to worry about..
__________________
Alida:
Born: Friday, 9th January 1998
Arktissilber Metallic on Schwarz 528i/5

Fs: KAC-8103D, Kicker 08ts10l52
Reply With Quote
  #6  
Old 09-04-2009, 05:41 AM
cn90 cn90 is online now
Officially Welcomed to the 'Fest
Location: Omaha NE
 
Join Date: Mar 2006
Posts: 12,304
Mein Auto: 1998 528i 5-sp 103K miles
IMHO, Stewart Wp is way too pricey.

My philosophy is WP is like tires, after x miles, replace the WP.

An OEM BMW or HEPU WP should last at least 70-100K in a 6-cyl engine. So why try to be fancy with Stewart WP.
Plus you may sell the car way before the next WP change.
Just my 2 cents.
Reply With Quote
  #7  
Old 09-04-2009, 07:38 AM
doru's Avatar
doru doru is online now
Officially Welcomed to the 'Fest
Location: Calgary
 
Join Date: Sep 2007
Posts: 4,428
Mein Auto: 2003 530iA
The obvious choices when changing the cooling system are:
OEM
Graf
Hepu

and/or the high performance Stewart with 20% more flow.

If the first 3 choices are pretty much the same, I would coose the cheapest one of them 3 variants - you will have to do the cooling system anyway after 80 - 100k.
The Stewart is 2 and 1/2 more pricier. My question is, if you don't have SS, would you actually benefit of running the Stewart pump? Will you increase the life of your cooling system assuming you flush it every 2 years?
As of today I still have my original cooling parts. I changed the thermostat 2 years ago (failed in the open position) and the bleeder screw (expansion tank) a few days ago. I also flush the coolant every 2 years.
So would you extend the life of the cooling system with the Stewart due to the 20% flow?
__________________
Looking for a DIY? Parts? Check this out, it might be your ticket
TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39, e53, e46 & Tribby
Reply With Quote
  #8  
Old 09-04-2009, 08:21 AM
Jason5driver's Avatar
Jason5driver Jason5driver is offline
Officially Welcomed to the 'Fest
Location: Middle of a corn field
 
Join Date: May 2007
Posts: 4,449
Mein Auto: E39 hamster w/ pin-wheel
http://www.bimmerfest.com/forums/sho...d.php?t=247568

http://forums.bimmerforums.com/forum....php?t=1112585

Cooling System Pics
http://picasaweb.google.com/mmm635/CoolantSystemPics#

http://picasaweb.google.com/lh/photo...yoeXAAvGLkvAcw
__________________

Last edited by Jason5driver; 09-04-2009 at 08:25 AM.
Reply With Quote
  #9  
Old 09-04-2009, 08:23 AM
Mack's Avatar
Mack Mack is offline
Thebizzy.com
Location: Atlanta
 
Join Date: Dec 2007
Posts: 6,428
Send a message via AIM to Mack
Mein Auto: '02 525i
I just had the EMP installed myself. Yeah it's over twice what the OEM waterpump is but piece of mind is priceless and it's definitely a quality unit.
__________________


Mods: Shark Injected | Magnaflow Exhaust + Resonator | H&R Springs | Bilstein SP Shocks + Struts | TMS Power Pulleys
Eibach F+R Sways | BeastPower Brackets | M-Tech bumpers | Predator ICE V3 + HID Fogs | Eurodyne CF Hood | BSW Sub + Dice + spec dock


[---Quote (Originally by Tex330i)---
You can warranty a turd, that way when you have a problem you can exchange it for a new turd.---End Quote---
Reply With Quote
  #10  
Old 07-02-2011, 03:42 PM
junebug01 junebug01 is offline
Registered User
Location: E-ville, IL
 
Join Date: Jul 2011
Posts: 1
Mein Auto: 2001 Z3 3.0i Roadste
Well kids I am a few days late, but, IMHO, the EMP Stewart water pump is the only proper replacement for your Ultimate driving machine. The others have flaws. Just like most BMW component, the EMP Stewart water pump is over engineered. I installed one in my 2000 528iT and loved the quality, fit, and finish. You get what you pay for. I am ordering one for my Z3 3.0i Roadster without reservation.$174.00...lifetime warranty..no brainer.

Last edited by junebug01; 07-02-2011 at 03:43 PM. Reason: spelling
Reply With Quote
  #11  
Old 07-02-2011, 05:46 PM
Mikes530 Mikes530 is offline
Officially Welcomed to the 'Fest
Location: Toronto
 
Join Date: Mar 2011
Posts: 286
Mein Auto: 530
03 530 - A question about the Stewart pump. The web site lists only the 525 & 528 as correct applications but it also lists the 330. I'm assuming that this is a simple omission on their part and the pump will fit a 530. True or false?
Reply With Quote
  #12  
Old 07-02-2011, 09:19 PM
Papabear426 Papabear426 is offline
Registered User
Location: Kicking around on a piece of ground in my hometown
 
Join Date: Jul 2010
Posts: 37
Mein Auto: '01 530i
I've started looking at part-cost selection in terms of the cost of a tank of gas ... 1-1/2 tanks of gas (extra) for a lifetime warranty? Put one in mine with Evans, and have high hopes of going way beyond (like 2x) 80-100K miles on this setup. Peace of mind.
Reply With Quote
  #13  
Old 07-03-2011, 12:13 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 19,181
Mein Auto: 02 BMW 525i M54 automatic
Quote:
Originally Posted by doru View Post
The obvious choices when changing the cooling system are
By way of cross reference ...
- What brand of waterpump to buy (1)
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 03:24 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms