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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 > N52 Owners: Elec Water Pump Check-In



View Poll Results: How many miles have you logged, and have you replaced your water pump yet?
Not yet, I have 60-75,000 miles 95 33.57%
Not yet, I have 75-90,000 miles 59 20.85%
Not yet, I have 90-105,000 miles 30 10.60%
Not yet, I have 105-120,000 miles 20 7.07%
Not yet, I'm invincible and have 120,000+ miles 10 3.53%
Yes I've had to replace and it was... 69 24.38%
Voters: 283. You may not vote on this poll

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      12-03-2012, 09:30 PM   #67
thecadman99
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Quote:
Originally Posted by Casca View Post
On the same note, I will replace the heat exchanger gasket as well as the oil housing one when I do my pump/t-stat.

http://www.ecstuning.com/BMW-E90-325...skets/ES24026/

Looks like the same type material, so probably the same problems......just not in an area where you notice.

Coming up with a list of different things to do at the same time that requires coolant replacement. So far:

Auxiliary fan switch
http://www.ecstuning.com/BMW-E90-325...ensor/ES34327/

Coolant/Oil temperature sensor
http://www.ecstuning.com/BMW-E90-325...ensor/ES34326/

Oil housing gasket
http://www.ecstuning.com/BMW-E90-325...ensor/ES24030/

Heat exchanger gasket
http://www.ecstuning.com/BMW-E90-325...ensor/ES24026/

Radiator flush
http://www.fcpeuro.com/products/radi...ro-moly-lm1804

Visual inspection of all hoses, clamps and general area and re-service the coolant with OEM coolant......water pump and t-stat replacement to...
Good info right there- I'll have to look into that heat exchanger gasket- sure looks like the same stuff that failed on my oil filter housing.
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      12-10-2012, 03:07 PM   #68
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a. at how many miles? 80k in SoCal
b. how much did the repair cost (and indicate labor vs parts)? $1,110 parts in labor... think the pump was $700
c. was it replaced at indy or dealer? Indy
d. was there any other damage caused as a result? Hope not
e. No racing
f. 6MT

Luckily it crapped out 2 days before my cross country trip LA-DC. No other problems since... currently at 85k
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      12-13-2012, 09:30 AM   #69
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a. at how many miles? Just pass 55000 KM

b. how much did the repair cost (and indicate labor vs parts)? Total around 3300HKD (or 430usd)

c. was it replaced at indy or dealer? Independent shop

d. was there any other damage caused as a result? NO (but the tranny run much smoother after the repair)

e. do you track your vehicle (canyon carving, street racing, backroads DOES NOT apply)? NO.

f. auto or manual? Auto
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      12-18-2012, 08:04 PM   #70
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a. at how many miles? 101K
b. how much did the repair cost (and indicate labor vs parts)? Labor $437, parts $515 pump + $112 Therm + $8.42 Alum screws + $23.80 coolant
c. was it replaced at indy or dealer? Indy
d. was there any other damage caused as a result? Nope
e. do you track your vehicle (canyon carving, street racing, backroads DOES NOT apply)? No
f. auto or manual? Auto

Also did every fluid the car has at 60K.
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      12-19-2012, 01:17 AM   #71
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Apparently, I'm a lucky one. I got (a) 188,294 miles before my water pump failed on a 3 hour trip back to Madison, WI from Iowa. I was having a great day, making plans with the wife on where we were going to dinner and I got a warning saying, "Warning, drive moderately or you will overheat" and ten seconds later, my 2006 330i sedan told me that I was overheating. I bought the car in 11/07 with 52k miles on it. This is the first time it has ever stranded me, with the exception of needing to jump a battery.

(b) Piersburg water pump - $336, Thermostat - $56, Oil Filter Housing gaskets - $20, hardware - $16, coolant - $20, Shop supplies/paper towels = $ 468 - Thermostat/Pump prices found on Ebay and BavAuto.com did a price-match only asking what site I found the pricing on.

(c) I did the work myself, 12-14 hours total running for parts/tools/etc. 6-8 hours of total wrenching, could do this now in 4 hours

(d) Only additional damage was a gasket on the hose from the Thermostat to the Oil Filter housing. This sprung a leak and caused an additional day delay to get my car back. Luckily my wife stays home and I was able to use her car while I waited the week to order/receive parts. I also lost a clip for the coolant hose that clips at the bottom of the coolant reservoir. Believe it or not, you can't order this clip. I had to negotiate with the parts guy at the stealership and asked him to ask the techs if they have any clips laying around from a replacement. They did and they "assured" me that they were "their" property. I brought them a bag of Butter Burgers from Culvers and thanked them for helping me out.

(e) never tracked the car

(f) automatic transmission

Last edited by ExchangeHut; 12-19-2012 at 01:19 AM. Reason: Update
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      01-03-2013, 10:44 PM   #72
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A) Mine went out at 98,000 miles.
B) Parts totaled around $450 (pump, t-stat, coolant.)
C) Did the work myself-approx 4 hours.
D) No additional damage noted
E) Does not apply
F) Auto
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      02-22-2013, 03:29 PM   #73
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A) 73kmiles
B) parts totaled over $700 (pump (new), tstat, coolant)
C) indie shop, total price (parts included) over $1100, + tow
D) probable short overheat, blown valve cover gasket
E) no
F) auto (ZF)
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      02-22-2013, 04:35 PM   #74
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a. at how many miles? 114k
b. how much did the repair cost (and indicate labor vs parts)? $1100 total for water pump & thermostat. Havenít check the break down
c. was it replaced at indy or dealer? Indy
d. was there any other damage caused as a result? No damage
e. do you track your vehicle (canyon carving, street racing, backroads DOES NOT apply)? NO
f. auto or manual? Auto
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      02-22-2013, 05:02 PM   #75
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Didn't know the N52KP has a heat exchanger, my N52 330i dosen't have one, I though only 335i's had them....

In such case if your changing your oil filter housing gasket, no brainer to do the heat exchanger gasket right on it.


I'm at 120k miles on my pump/stat, I check my car monthly for any waterpump codes, as soon as I start getting some I'm doing mine.

Did a coolant change when I did the oil filter housing gasket, COOLANT WAS FULL of rubber from the failed gasket.
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      03-04-2013, 06:02 PM   #76
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a. 58000 miles
b. $1k, 700+ parts(pump, thermo, shop supplies etc etc), 300+labor
c. Indy
d. No
e. No
f. AT
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      03-04-2013, 07:05 PM   #77
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Quote:
Originally Posted by e90pilot View Post
I believe the yellow overheat comes on at 120C the red comes on at 125C. The car actually detects a problem with the water pump but doesn't warn you. It will cut power, run the fan at its highest speed, enrichen the mixture, etc. The only time it warns you is when the temp gets too high.
SO is the aux fan going on high the only preemptive "symptom" of a pump getting ready to go out on you?
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      03-04-2013, 07:14 PM   #78
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Does anyone know how many speeds the aux fan has? I ve heard mine going on at low speed but only when I drive car rough at high rpms. I think this is normal since I remember this happened to me a few times ove the years and did it yesterday. I could hear fan a low speed after I turn car off for about 5 min then fan shuts off. I will checl coolant level just in case.
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      03-05-2013, 03:30 PM   #79
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mine went bad at 47000
did it myself
no track use
manual
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      03-06-2013, 02:30 AM   #80
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78k mile and still going
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      03-07-2013, 09:12 PM   #81
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Got mine on my way to work this morning @ 85000k.
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      03-09-2013, 08:34 PM   #82
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2006 3.0 si Z4 (yeah I know, but it is the N52 engine!)

* Changed the water pump, t-stat and all radiator hoses at 82000 miles
* About $700 - parts only as I did it myself - preventive maintenance
* No track
* Manual
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      03-10-2013, 03:58 PM   #83
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Quote:
Originally Posted by Hedges View Post
Full Parts bought from Tisher and installed locally here. 88000km had to replace! No errors yet but the i started getting the symptons and it was annoying as hell so i replaced it before it stopped working. Has been back to normal now
Hedges --- What were the symptions? Very curious!

My E91 2007 has 117K Miles. I've had low coolant warnings twice in the past year. First time I only had to fill less than a quart. the second time, seems like half a gallon.

I looked down the engine bay and noticed that there's wet (likely coolant) spots at the bottom panel/tray. This is almost directly under the headlights towards the very bottom of the car. I suspect something is leaking. Could it be the water pump? Or just hoses/connections? I need to open the panel up and inspect.

So, back to my question. Does the water pump begin to leak prior to failure? Or does it just stop working?

NOTE: I have not yet had high temp warnings. I'm very nervous because my daily commute is ~ 45 miles (1.5 hrs) each way on LA freeways.

Much thanks in advance!
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      03-10-2013, 04:01 PM   #84
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a. at how many miles? 116K Miles --- NOT FAILED YET
b. how much did the repair cost TBD --- hope to DIY
c. was it replaced at indy or dealer? hope to DIY
d. was there any other damage caused as a result? TBD
e. do you track your vehicle Never
f. auto or manual? Auto
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      03-11-2013, 09:27 AM   #85
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a. at how many miles? 68k
b. how much did the repair cost TBD --- at the dealership now. Will update when i find out
c. was it replaced at indy or dealer? Dealer
d. was there any other damage caused as a result? TBD
e. do you track your vehicle? Nope
f. auto or manual? Auto
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      03-28-2013, 09:17 PM   #86
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a. at how many miles? 75k
b. how much did the repair cost TBD --- Parts from Tischer $500
c. was it replaced at indy or dealer? Personally
d. was there any other damage caused as a result? no
e. do you track your vehicle? Nope
f. auto or manual? Auto
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      03-31-2013, 01:03 PM   #87
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I had to have mine replaced at about 106k and a buddy of mine did it for about 750 all together
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      06-20-2013, 02:22 PM   #88
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a} 82500 or 130k Kms
b}C$1576 inc Tax, Parts Pump $777 Thermostat $190 Labor $360, diff in new AF etc
Found after that Dealer had a Special on for 440, 690 installed, Pissed me and the Garage, but I was just so close to them when it happened I just drove into them as the red went on.
c} Used my back up garage after shenanigans at Dealer on prior problems
d}No other damage, but I will buy a spare to do myself close to next anticipation
e} Auto, 330xi
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