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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 08-19-2013, 04:28 AM
rebelx5150 rebelx5150 is online now
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emp stewart?

Hey all. I have an 03 330i with 61k on the clock. After reading the wiki I'm thinking its time for a water pump replacement are these worth it? What else should I replace while I'm in there?
Thanks!
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  #2  
Old 08-19-2013, 05:58 AM
FredoinSF FredoinSF is offline
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emp stewart?

Some say that water pump is overkill given its price and it probably is unless you plan on keeping the car forever.
My 02 330ci has 53k miles and I plan on doing an entire cooling system refresh using the kit from OEM bimmer parts.
At that age, even with the low mileage, I figure most of the plastic parts will be ready to break at any time. I replaced the expansion tank preventively 4 or 5 years ago.


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  #3  
Old 08-19-2013, 06:54 AM
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mawana mawana is offline
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Quote:
Originally Posted by FredoinSF View Post
Some say that water pump is overkill given its price and it probably is unless you plan on keeping the car forever.
My 02 330ci has 53k miles and I plan on doing an entire cooling system refresh using the kit from OEM bimmer parts.
At that age, even with the low mileage, I figure most of the plastic parts will be ready to break at any time. I replaced the expansion tank preventively 4 or 5 years ago.


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The stewart water pump is definitely overkill, especially if you are not boosted. The updated stock pump with the metal impeller will do the job just fine. Also, search e46f, there are some guys boosted who are still running stock water pumps. Of course, the updated one!
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  #4  
Old 08-19-2013, 06:59 AM
GoForthFast GoForthFast is offline
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Quote:
Originally Posted by mawana View Post
The stewart water pump is definitely overkill, especially if you are not boosted. The updated stock pump with the metal impeller will do the job just fine. Also, search e46f, there are some guys boosted who are still running stock water pumps. Of course, the updated one!
+1
All said here is true. The Stewart is overengineered and expensive, therefore making it a personal choice rather than a must have.
If dollars aren't tight it's fun to install one. If you're on a budget the stock will do you just fine.

I have the Stewart. No regrets.
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  #5  
Old 08-19-2013, 05:01 PM
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G. P. Burdell G. P. Burdell is offline
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Quote:
Originally Posted by rebelx5150 View Post
What else should I replace while I'm in there?
In addition to refreshing the cooling system as FredoinSF suggests, consider the following:

--new belts
--new belt tensioners and idler pulley
--new fan clutch and belt-driven fan (if equipped)
--new water pump pulley (the old one is likely to crack or chip when you remove it)

Remember to lightly coat the surface where the water pump flange contacts the pulley with anti-seize to ease future disassembly. Avoid getting the anti-seize into the bolt holes.
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  #6  
Old 08-19-2013, 05:27 PM
rebelx5150 rebelx5150 is online now
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I'm the kind of person who will pay more to never have to do things again. I'd rather pay more for stuff than wait in line, life's too short and I'd rather have time than money.
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  #7  
Old 08-19-2013, 06:41 PM
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If you have an automatic car, I'd do it in a second. If you have a manual with an electric fan, it is your call. I have installed them for people and they are NICE. I will be putting one on my own car when I am due for my next overhaul.
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  #8  
Old 08-26-2013, 05:43 PM
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emp stewart?

I bought the Stewart and love it. Also ecs's aluminum w/p pulley is a nice touch.


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  #9  
Old 08-27-2013, 01:38 PM
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Originally Posted by j_schroeder View Post
I bought the Stewart and love it. Also ecs's aluminum w/p pulley is a nice touch.


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Good move on the pulley. The stock one is lacking.
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  #10  
Old 08-27-2013, 03:40 PM
rebelx5150 rebelx5150 is online now
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Originally Posted by j_schroeder View Post
I bought the Stewart and love it. Also ecs's aluminum w/p pulley is a nice touch.


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Sorry but what's ecs?
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  #11  
Old 08-27-2013, 04:12 PM
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Sorry but what's ecs?
ECS tuning is a vendor.
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  #12  
Old 08-27-2013, 04:39 PM
RivMcLean RivMcLean is offline
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Quote:
Originally Posted by j_schroeder View Post
I bought the Stewart and love it. Also ecs's aluminum w/p pulley is a nice touch.
+1
I purchased the same, the 20% extra flow and heavy duty bearing is cheap insurance compared to the price of overheating.
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  #13  
Old 08-27-2013, 11:11 PM
GoForthFast GoForthFast is offline
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Originally Posted by SJBimmer View Post
ECS tuning is a vendor.
They are included in this shopping list:

www.furiousmethod.com
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  #14  
Old 08-28-2013, 02:41 PM
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Quote:
Originally Posted by rebelx5150 View Post
Sorry but what's ecs?
that's us! We're one of the forum sponsors and a parts meca for BMWs (as well as other German makes)


I highly suggest replacing the pulley when you put on a new water pump, our ECS M54 Water pump pulley (LINK) is a more durable pulley than the factory plastic unit. and adds a touch of dress up in the engine bay.

For the water pump it self, EMPs (LINK) are hard to beat if you are planning on the car being a long term car. They are great beefy pumps, that also produce a 20% flow increase over your stock pump. If you don't want to spend the extra for the EMP pump I highly suggest the Geba (LINK), it's a German made, metal impeller, direct replacement for your factory pump.
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  #15  
Old 08-30-2013, 05:53 AM
rebelx5150 rebelx5150 is online now
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[QUOTE=ECSTuning;7802881] that's us! We're one of the forum sponsors and a parts meca for BMWs (as well as other German makes)


I highly suggest replacing the pulley when you put on a new water pump, our ECS M54 Water pump pulley (LINK) is a more durable pulley than the factory plastic unit. and adds a touch of dress up in the engine bay.

For the water pump it self, EMPs (LINK) are hard to beat if you are planning on the car being a long term car. They are great beefy pumps, that also produce a 20% flow increase over your stock pump. If you don't want to spend the extra for the EMP pump I highly suggest the Geba (LINK), it's a German made, metal impeller, direct replacement for your factory pump.[QUOTE

Thanks! Do you recommend a thermostat?
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  #16  
Old 08-30-2013, 06:00 AM
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Gryphon Gryphon is online now
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When I redid my cooling system I included the following upgrades:
EMP Stewart WP
Aluminum WP pulley
Brass bleeder screw for the ET

As well as all new hoses for the coolant system. I investigated the aluminum radiator and silicon hoses but the ROI wasn't good enough for me to go with them.
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  #17  
Old 08-30-2013, 06:36 AM
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Originally Posted by rebelx5150 View Post
Thanks! Do you recommend a thermostat?
It's not a bad idea to go ahead and put a new one in, the Behr and Wahler (LINK) are both great alternatives to the genuine BMW part, all three come with the gasket pre installed so no need to pick up a new gasket.
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  #18  
Old 08-30-2013, 01:12 PM
rebelx5150 rebelx5150 is online now
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Hey, ECS after snooping around on your site, do you guys offer a refresh kit with the EMP Stewart pump or could you put one together? The $329 kit with GEBA pump has my interest but I'd rather go with the stewart water pump.
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  #19  
Old 08-30-2013, 01:14 PM
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Rebel, I'll shoot you a PM. I don't have a refresh kit with the EMP but I can put something together for you.

-James
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  #20  
Old 08-30-2013, 10:20 PM
GoForthFast GoForthFast is offline
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Quote:
Originally Posted by ECSTuning View Post
Rebel, I'll shoot you a PM. I don't have a refresh kit with the EMP but I can put something together for you.

-James
If you get a price on this, why not push it here for all to think about?
Would be a service for those interested.
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  #21  
Old 08-31-2013, 05:42 AM
Cavi Mike Cavi Mike is offline
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Quote:
Originally Posted by ECSTuning View Post
If you don't want to spend the extra for the EMP pump I highly suggest the Geba (LINK), it's a German made, metal impeller, direct replacement for your factory pump.
If you're talking abut the one with the heavy, cast impeller, I put one in my E36 and coupled to a UUC underdrive pulley, it didn't flow enough and my car would regularly be in the red in stop-n-go traffic. I'm guessing the cast impeller not only is too restrictive, but the ridiculous amount of casting imperfections on the blades must have been causing a ton of turbulence as well.

If you're talking about the pump with the welded stainless impeller, this is what happened to mine after a couple months:



I then went to the dealer and got the updated OEM plastic impeller pump (the black one that doesn't fall off the pump, doubt there are any old white ones left anyways) and finally I was able to have a car that didn't leave me stranded. It's still on that same pump 5 years later.

ALL of this was with a COMPLETE cooling system overhaul with BEHR radiator. There were no other things that could have been causing my woes and the fact that the black plastic impeller pump allowed me to do plenty of what my sig pic shows - the updated OEM plastic pump is NOT junk. The original one was bad, not the new one.
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  #22  
Old 09-04-2013, 02:35 PM
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Originally Posted by GoForthFast View Post
If you get a price on this, why not push it here for all to think about?
Would be a service for those interested.
There are different levels of kits and different kits for options and build dates. Feel free to PM me your cars info and which kit level you'd like and I'll put together a custom cart with an EMP pump for you.

-James
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  #23  
Old 09-04-2013, 06:25 PM
RivMcLean RivMcLean is offline
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Wile you're thinking about the EMP Stewart pump, their are other things you need,I know... Obvious. Here is my fun kit I purchased from ECSTuning. They didn't have a kit with the EMP Stewart pump so I put one together, they reviewed it for me so I didn't miss anything. I included the pulley and tensioners. BTW my mechanical to hydraulic tensioner conversion kit didn't come with bolts, had to go to the dealer and pick them up there. Otherwise great deal.
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  #24  
Old 09-04-2013, 08:37 PM
cvx5832 cvx5832 is offline
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Quote:
Originally Posted by RivMcLean View Post
Wile you're thinking about the EMP Stewart pump, their are other things you need,I know... Obvious. Here is my fun kit I purchased from ECSTuning. They didn't have a kit with the EMP Stewart pump so I put one together, they reviewed it for me so I didn't miss anything. I included the pulley and tensioners. BTW my mechanical to hydraulic tensioner conversion kit didn't come with bolts, had to go to the dealer and pick them up there. Otherwise great deal.
A similar staging area, but it does come with some nagging if the project lasts longer than a day:

IMG_8156
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Old 09-04-2013, 09:27 PM
RivMcLean RivMcLean is offline
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A similar staging area, but it does come with some nagging if the project lasts longer than a day:
Honey, it was the washer dryer workbench combo, don't you remember?
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