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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 05-23-2019, 06:21 PM
poorsha poorsha is offline
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1997 e36 which water pump???

I am confused.
Should I replace my water pump with a BMW original or with an aftermarket metal impeller one? Too much conflicting info out there. Im sure (hope) BMW must know what they are doing.
Car has approx 90,000 miles.
Very well looked after. Super clean. Completely stock.
From receipts I received with car everything has been replaced except the water pump (can not find confirmation).
Any experienced recommendations?
Thanks in advance.
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  #2  
Old 05-23-2019, 06:42 PM
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southpark11235 southpark11235 is online now
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Go metal. BMW did not know what they where doing when it came to the e36's cooling system and plastic breaks. If you want extreme overkill you can pick up a Stewart water pump for around $200. For a normal water pump just pick up an aftermarket one with a metal impeller for under $50. Just avoid the Uro branded one and you should be fine.
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Old 05-23-2019, 07:11 PM
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poorsha, look over the whole cooling system and consider replacing EVERYTHING, not just the water pump. All that plastic is now 22+ years old if it's original parts. In particular the radiator, which has a history of failing spectacularly and catastrophically at the hose neck.
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Old 05-23-2019, 10:42 PM
poorsha poorsha is offline
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According to receipts:
Approx 25,000 miles ago radiator neck went.
New rad, thermostat, expansion tank installed.
Approx 35,000 miles ago fan clutch, thermostat and housing, belt tensioner, thermostat and housing replaced.
All work done by reputable shop (but not by me).
Car was driven very little but maintained.
I have stacks of bills for a lot of stuff (complete suspension, head gasket, oil changes, tranny flushes, coolant system flushes, etc).
The owner spent a ton of money on this car.
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Old 05-23-2019, 10:48 PM
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In that case you should be ok for another 45k to 55k.

Why did you think the water pump needed changing?

Edit: I see it wasn't one of the parts replaced...or at least you didn't mention it. You are well on the way of having a great relationship with that car. I can tell you'll be an excellent custodian of it.
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Last edited by hornhospital; 05-23-2019 at 10:52 PM.
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  #6  
Old 05-24-2019, 07:19 AM
poorsha poorsha is offline
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"Why did you think the water pump needed changing?"

It is the only thing that I can see that was NOT replaced.
Seems strange to me that they would not change it just as a precaution.

This all started for me as I wanted to upgrade the noisy mechanical belt tensioner to a hydraulic type.
And I figured "while I was in there".
We all know how that goes.
And yes, the car is in good hands. I am 65 this year. An ex 911 hobbyist (sold out and banked the $$).
This BMW is my third and my first vert.
A fun ride and a great drive.
Thanks for the input from all. I may wait till end of summer when the car goes back in the garage for the winter and do water work.
Cheres.
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  #7  
Old 06-09-2019, 01:38 AM
Nasher16 Nasher16 is offline
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If you want to pick up a composite material water pump from your local parts store that will work too, they are pretty durable and I have one in my car. I smacked it with a ratchet and it is pretty sturdy


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  #8  
Old 06-12-2019, 04:00 PM
XTech2003 XTech2003 is offline
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Water pump

I suggest buying the BMW M3 pump, just ask for a 97 M3 pump. It has a steel impeller, I know it's not cheap but it passed quality control. When you see some pumps that look like the BMW was ground off it's because they failed QC and are then sold as aftermarket. I don't like doing the same job again and again to save some cash. It pays off in the long run.
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Old 06-12-2019, 05:59 PM
poorsha poorsha is offline
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Thanks Xtech2003.
Great info.
Cheers.

Quote:
Originally Posted by XTech2003 View Post
I suggest buying the BMW M3 pump, just ask for a 97 M3 pump. It has a steel impeller, I know it's not cheap but it passed quality control. When you see some pumps that look like the BMW was ground off it's because they failed QC and are then sold as aftermarket. I don't like doing the same job again and again to save some cash. It pays off in the long run.

Last edited by poorsha; 06-12-2019 at 06:03 PM.
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Old 06-13-2019, 01:47 PM
poorsha poorsha is offline
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I am having trouble finding this water pump


Quote:
Originally Posted by XTech2003 View Post
I suggest buying the BMW M3 pump, just ask for a 97 M3 pump. It has a steel impeller, I know it's not cheap but it passed quality control. When you see some pumps that look like the BMW was ground off it's because they failed QC and are then sold as aftermarket. I don't like doing the same job again and again to save some cash. It pays off in the long run.
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Old 06-13-2019, 04:46 PM
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Quote:
Originally Posted by poorsha View Post
I am having trouble finding this water pump
That's because the info you were given isn't accurate. There is no such thing as an "M3 pump". All 6-cylinder E36 BMWs use the exact same water pump, which is part number 11517527799. Changes made to the impeller material were based on production year, but were not model specific (325 vs. 328 vs. M3). Just get an OEM pump. Doesn't have to be BMW brand. I put a Bosch pump in my car about ten years ago and it's been fine, and has endured years of track days.
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Last edited by ZeGerman; 06-13-2019 at 05:10 PM.
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Old 06-13-2019, 05:22 PM
poorsha poorsha is offline
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Thank you ZeGerman.

Quote:
Originally Posted by ZeGerman View Post
That's because the info you were given isn't accurate. There is no such thing as an "M3 pump". All 6-cylinder E36 BMWs use the exact same water pump, which is part number 11517527799. Changes made to the impeller material were based on production year, but were not model specific (325 vs. 328 vs. M3). Just get an OEM pump. Doesn't have to be BMW brand. I put a Bosch pump in my car about ten years ago and it's been fine, and has endured years of track days.
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  #13  
Old 06-14-2019, 01:37 PM
XTech2003 XTech2003 is offline
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Sorry poorsha!

Sorry for the wrong info. I guess a few things have changed over the years. In the early 2000's we did this as common practice on our own vehicles.
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Old 06-14-2019, 02:25 PM
john kaminski john kaminski is offline
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Lets see - OEM pump lasted 23 years / 90,000 miles. If you go OEM you could be looking at another replacement when your 88 - will you be up for that then or maybe you will want some thing that will go longer ? I'm 77 with a 94 with 114,000 miles - my perspective has evolved.
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