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BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      03-19-2014, 07:13 PM   #1
Dackelone
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Arrow DIY electric water pump VIDEO for N-series (N51/N52.N54/N55) engines...

BavAuto put together a great video on how to replace the electric water pump/thermstat in our car. Plus the car in their video was a 135i, so its quite an interesting video!



BavarianAuto's DIY video on Replacing the electric water pump on late model BMW N-Series 6 cylinder engines...



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      03-19-2014, 09:26 PM   #2
hatepotholez
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I would change all the coolant hoses attached to the pump and thermostat including hose clamps at the same time.
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      03-19-2014, 09:56 PM   #3
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Thanks for posting. I saw it a few months back on bav blog! Awesome info.
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2008 128i E88 / Alpine White / Boston Leather Sport / 6AT / M3 Paddle Shifters / Bilstein B8 / H&R Springs / Dinan Fixed Camber Plates / BMW 335i Front Brakes / PIAA Xtreme White 4150K Angel Eyes / Rear Fogs Enabled / Cyba Air Scoops / Euro Airbox / BMW Performance Exhaust / Stubby BMW Antenna
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      04-01-2014, 07:56 AM   #4
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2008 135i  [4.33]
Thanks a million Dack and BAV!!
Just recieved my pump and thermostat today. Can't wait to bring her out for the season.
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      04-01-2014, 05:39 PM   #5
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HondaGoneRogue be sure to post up some pics of the R&R-ing of the water pump for us 1Addicts.

Btw... your still in K-town right>? I am starting the planning phase of our summer Alpine Pass tour. So keep a look out in the European forum soon. I'm thinking of mid to late July for our tour.
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      04-02-2014, 10:20 AM   #6
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2008 135i  [4.33]
Yessir! Will do.
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2008 AW 135i, Whats a mod?
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      04-12-2014, 08:41 AM   #7
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2008 135i  [4.33]
Got the water pump swapped out. It took a little less than two hours following the video exactly. I didn't take pics because I was very rushed to get it done (working two jobs at the moment), and so I just flew through it. VERY straightforward. There were no surprises at all. All clamps and couplings came right off. Everything was able to come off with only a 1/4" drive ratchet, which made things a lot easier considering the small space you are working in.

I can't believe what the dealer chargers for this. Maybe I should go into that business haha.
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      04-12-2014, 05:45 PM   #8
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Quote:
Originally Posted by HondaGoneRogue View Post
Got the water pump swapped out. It took a little less than two hours following the video exactly. I didn't take pics because I was very rushed to get it done (working two jobs at the moment), and so I just flew through it. VERY straightforward. There were no surprises at all. All clamps and couplings came right off. Everything was able to come off with only a 1/4" drive ratchet, which made things a lot easier considering the small space you are working in.

I can't believe what the dealer chargers for this. Maybe I should go into that business haha.
Have tools will travel ehh? I can see an epic craft-shop weekend on Base.

I remember when you posted pics when replaced your HPFP in the parking lot of Bitburg airfield! My hats off to you sir!
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      04-14-2014, 06:26 PM   #9
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I just replaced my thermostat and I never want to do that again. What a PITA!
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      01-18-2015, 05:47 AM   #10
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Cross posting... (pics and tips on water pump DIY)...

Another water pump down, <48k
http://www.1addicts.com/forums/showthread.php?t=1021604
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      10-02-2015, 11:03 AM   #11
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Starting mine today! Pump and t-stat.

Update: Completed successfully! Got sold the wrong t-stat (128i) and only noticed when I tried to re-install as they look almost identical. Had to scramble around on Saturday to pick one up from the local BMW dealer (who gave me a nice discount...thanks Maranellow BMW!). I did it all with the car up only on ramps, which didn't leave a ton of room underneath leading to lots and lots of cursing (sorry neighbours!). I have to say that without those videos from Bavauto, I would have taken one look at where the pump is and just given up! Just an excellent excellent video!

Last edited by JohnnyG_TO; 10-04-2015 at 11:23 AM.
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      01-12-2016, 10:28 AM   #12
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Great video and really not too bad of a job. I did mine using ramps and it made things a little tight. If you have access to a lift or jack stands, all the better. The worst part was disconnecting/reconnecting the hose form the radiator to the thermostat. It's positioned in such a way that you can't get any leverage and is pretty tight on the thermostat.
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      01-13-2016, 11:48 AM   #13
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I have a question! Why are you replacing the thermostat? They seldom go bad!
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      01-13-2016, 03:42 PM   #14
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Quote:
Originally Posted by Mr Rooty Von Tooty View Post
I have a question! Why are you replacing the thermostat? They seldom go bad!
Because no one wants to go back in there. Mechanical thermostats fail so I don't think an electronic one is any more reliable. I would replace the thermostat - IF it were my car.
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      01-25-2016, 11:20 PM   #15
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My water pump failed a few months ago and had no choice but to get a tow to the dealer and have them replace it. They told me my thermostat was still good, so they only replaced the water pump. I'm thinking I should replace my thermostat soon. Probably as soon as it gets nice out. Looks like I'll still have to remove the water pump? Anything else I should replace other than the aluminum water pump bolts?
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      01-26-2016, 05:49 AM   #16
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Quote:
Originally Posted by Delta Goose View Post
My water pump failed a few months ago and had no choice but to get a tow to the dealer and have them replace it. They told me my thermostat was still good, so they only replaced the water pump. I'm thinking I should replace my thermostat soon. Probably as soon as it gets nice out. Looks like I'll still have to remove the water pump? Anything else I should replace other than the aluminum water pump bolts?
Maybe the hose that runs from the thermostat to the e-pump, IF it wasn't replaced before. And definitely replace the alu H2O pump bolts. Use BMW bought coolant too.

N54...

See hose #1 here...
http://www.realoem.com/bmw/enUS/show...diagId=11_3972


N55...

See hose #1 here...
http://www.realoem.com/bmw/enUS/show...diagId=11_4468
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      01-28-2016, 11:25 PM   #17
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Quote:
Originally Posted by Dackelone View Post
Maybe the hose that runs from the thermostat to the e-pump, IF it wasn't replaced before. And definitely replace the alu H2O pump bolts. Use BMW bought coolant too.

N54...

See hose #1 here...
http://www.realoem.com/bmw/enUS/show...diagId=11_3972


N55...

See hose #1 here...
http://www.realoem.com/bmw/enUS/show...diagId=11_4468
I'll confirm with the dealer to see if they replaced the hose or not. Thanks Dackelone!
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      02-19-2016, 12:22 AM   #18
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Dackelone, if the dealer replaced the water pump bolts too when they replaced the pump, do I still need to get new ones when I switch out the thermostat?
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      02-19-2016, 06:46 AM   #19
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Quote:
Originally Posted by Delta Goose View Post
Dackelone, if the dealer replaced the water pump bolts too when they replaced the pump, do I still need to get new ones when I switch out the thermostat?
Yes, you should replace them. The bolts are only good once. They are allu and will stretch once torqued. To be safe I would buy new bolts.
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      03-06-2016, 01:33 PM   #20
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Used this video to change mine. The push fittings took a lot more effort to get off than the video suggests mind!
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      03-06-2016, 02:14 PM   #21
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Quote:
Originally Posted by Rosso83 View Post
Used this video to change mine. The push fittings took a lot more effort to get off than the video suggests mind!
how was the process overall? your first time?
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      03-07-2016, 03:44 PM   #22
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Btw... Looks like my waterpump is on its was out. I have a small coolant leak under the front of the engine. I don't see any coolant when I park my 135i, but I can see coolant at the front of the engine/radiator - inside the belly pan. A friend of mine who is a BMW tech says its very common for the e-pump's to develop a leak at the casting seam.

I'm at 124K kms - with my US spec 135i. :/
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