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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Is there a way to upgrade E90's water pump?



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      10-26-2012, 12:07 PM   #1
N0OS3
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Is there a way to upgrade E90's water pump?

So, after 76k miles, my water pump went out (my thermostat has been out, just never overheated until last week).

I went ahead and ordered new OEM parts and i'm going to be doing the install myself this weekend [i'll try my best to make a DIY video/write up]... but i was just wondering though... since this has been an ongoing problem with BMW's for years, is there an aftermarket company that makes water pumps and thermostats for BMWs that excedes OEM standards and has longer life? I'm expecting to probably have to change the water pump again after 75k+ miles but i'd like to know if there's another option i can take next time...

Another question too i have; since the water pumps for N52 and N54 are virtually the same [bolt points] only the N52 is 200w and the N54 is 400w, would you essentially upgrade the cooling performance of your N52 by putting in an N54 pump? :/
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      10-26-2012, 05:54 PM   #2
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Since the 2006 models, BMW is on their third water pump part number. I'm assuming that the second two pumps were upgrades on the original one. I bought the latest pump and t stat and am also planning to replace mine soon before mine fails. Currently have 50K on a 2006 325i. I believe the 2006 models have the highest pump failure rate.

Since I'm planning on DIY, please post any tips you have after doing the job. From the posts, it appears that the job takes anywhere from 4-8 hours. Some people saying it was very difficult and some saying that it was easy. Some posts say that the hose clamps are hard to remove and also the upper pump bolt is very difficult to replace. Some have just installed the pump without the upper bolt.
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      10-26-2012, 11:46 PM   #3
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I will offer any tips i can... i will have my gf record the process (and edit out all the foul language and aggrevation portions of course lol) so that a simple picture-by-picture DIY can't do it justice.
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      10-26-2012, 11:49 PM   #4
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Originally Posted by Brad from the OC View Post
Since the 2006 models, BMW is on their third water pump part number. I'm assuming that the second two pumps were upgrades on the original one. I bought the latest pump and t stat and am also planning to replace mine soon before mine fails. Currently have 50K on a 2006 325i. I believe the 2006 models have the highest pump failure rate.

Since I'm planning on DIY, please post any tips you have after doing the job. From the posts, it appears that the job takes anywhere from 4-8 hours. Some people saying it was very difficult and some saying that it was easy. Some posts say that the hose clamps are hard to remove and also the upper pump bolt is very difficult to replace. Some have just installed the pump without the upper bolt.
06 on 50k miles? that's not a lot. i'm thinking of doing mine too as a precaution. feb 06 delivery around 63k miles. no problems yet, but i think i might just do an oilchange/filter with the pump/thermo
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      10-27-2012, 12:49 AM   #5
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Originally Posted by just4kickz View Post
06 on 50k miles? that's not a lot. i'm thinking of doing mine too as a precaution. feb 06 delivery around 63k miles. no problems yet, but i think i might just do an oilchange/filter with the pump/thermo
Do it. It's not a matter of if it will break, it's when...might as well do it now to avoid being stranded or worst, damage the car accidentally.
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      10-28-2012, 09:50 AM   #6
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Do it. It's not a matter of if it will break, it's when...might as well do it now to avoid being stranded or worst, damage the car accidentally.
should i be expected to do buy coolant too for a coolant flush? or should the shop have some. lol
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      10-28-2012, 10:16 AM   #7
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I just did this job on a relatives 06 325i. I followed someone elses diy instructions upon this forum. It took me about 4 hours.

I remember undoing the undertray, loosening the sway bar mounting brackets, and then draining the radiator, loosening the hoses and draining those out. The hardest part for me was loosening and or disconnecting the hoses. Some have clamps while others have clips but the rubber will have taken a set upon the aluminum which creates a lot of stiction. You have to then disconnect the thermostat from the pump by undoing 4 screws, undo the electrical connectors then can take one out at a time. I know some prefer to remove the radiator as it gives you more room but i managed to be able to remove the pump and thermo one at a time with the radiator in place.

You do need about 1 gallon of bmw coolant and one gallon of distilled water and then have to follow a bleeding procedure.
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      10-28-2012, 04:04 PM   #8
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So, i finished it all up last night... took me about 3.5hrs total work time to get it all out. To make things easier, i realized having the bumper off (because i'm currently fixing a fog problem in my headlights as well) made things a lot easier... the only real problem i came into was one of the screw-type hose clamps' screw was facing towards the front of the car so the only way to reach is was either from a tight space from the top of the engine or by flat-head screwdriver from the front...

Putting it all back together and bleeding it was super easy. My Bentley Publishers manual said the capacity for my car is 2.23gal of coolant, though i used slightly less the 2gal diluted mixture... **shrug**... i did the bleeding procedure twice and still used less than 2 gal... i think i'll drive it around a bit (i miss WOT lol), come back and do the procedure one more time to try and loosen up some bubbles that might be stuck somewhere...

I also recorded the process so after a bit of editing i will post up on YouTube. ^__^
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      10-28-2012, 07:04 PM   #9
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Thanks NOOS3,
Post the YouTube link so we can all view it!
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      10-29-2012, 10:48 AM   #10
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will do. i'm just short a video of the exact tools needed (from top to bottom) and a drive-by video as a closing scene... hopefully i will finish editing today and post a link here and in the DIY section. ^__^

I like to contribute...
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      10-30-2012, 12:45 AM   #11
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Here's the video!

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      10-30-2012, 10:34 PM   #12
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Respect... bookmarked for future reference!


Edit:
Oh man I think I jinxed myself ^^. Just had an overheating fault (Both yellow and red). Luckily for me it was it 1 deg C out and I wasn't far from home. Watching that whole video makes me want to source the part myself and get someone else to do it....

Last edited by Volasko; 11-04-2012 at 10:21 PM.
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      10-30-2012, 10:57 PM   #13
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Quote:
Originally Posted by N0OS3 View Post
Another question too i have; since the water pumps for N52 and N54 are virtually the same [bolt points] only the N52 is 200w and the N54 is 400w, would you essentially upgrade the cooling performance of your N52 by putting in an N54 pump? :/
I would say it wouldn't be that easy. The electrical system probably isn't sized for the larger motor.
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      11-15-2012, 01:31 PM   #14
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Quote:
Originally Posted by Brad from the OC View Post
Since the 2006 models, BMW is on their third water pump part number. I'm assuming that the second two pumps were upgrades on the original one. I bought the latest pump and t stat and am also planning to replace mine soon before mine fails. Currently have 50K on a 2006 325i. I believe the 2006 models have the highest pump failure rate.
Do you happen to know what those part numbers are and if so can you post them please? Mine is going in tomorrow and I just want to make sure I am getting the latest and gretest design.

Much appreciated !
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      11-15-2012, 08:10 PM   #15
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2006 325i 110k no water pump problems yet

nice video
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      11-15-2012, 09:46 PM   #16
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Quote:
Originally Posted by LittleBlue View Post
Do you happen to know what those part numbers are and if so can you post them please? Mine is going in tomorrow and I just want to make sure I am getting the latest and gretest design.

Much appreciated !
11 51 7 586 925 Water Pump
11 53 7 549 476 Thermostat
11 51 0 392 553 Aluminum/Magnesium Screws
12 52 7 557 037 Aluminum Bolt Outside
07 11 9 903 851 Hex Bolt with Washer

I bought the "special" from Tischer and just looked at my invoice for the above parts. It said remanufactured next to the pump part!! Oh no, I just installed the pump today. Now I just hope that remanufactured is as good as new...
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      12-11-2012, 11:40 AM   #17
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2008 BMW 128i  [0.00]
2011 n52 in 7 series, 5 series, x3 and all lower HP spec n52 have this water pump:
11517583836

http://www.realoem.com/bmw/showparts...=11&fg=35&hl=1

Should we attempt to use it?

Physical differences exist, but mount points and inlet location is the same. Only difference si that this is used on F## models and ours are for E## models
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Last edited by andrey_gta; 12-11-2012 at 12:38 PM.
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