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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #26  
Old 05-18-2013, 03:16 PM
ddeliber ddeliber is offline
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Woke up this morning to this (see first attached pic - inside and just in front of the driver's side front wheel).

Haven't even started it up yet, it wasn't overheating yesterday so I don't know the cause. I just went on parts.com and was pleasantly surprised by the price of the water pump $141.25 (mine is a diesel) even though I doubt that this is the problem - small leak (it is water though) and only 25k miles on my 2011. I am dreading diagnosing this though, hopefully it is just condensation or something. Anyone have any thoughts.

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Last edited by ddeliber; 05-18-2013 at 03:19 PM.
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  #27  
Old 05-18-2013, 03:44 PM
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galahad05 galahad05 is offline
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You smell antifreeze in that water?
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  #28  
Old 05-18-2013, 03:45 PM
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fun2drive fun2drive is offline
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Sounds like you have a mechanically driven water pump not electric.
BMW has a good idea with the electric but should would be nice to be at least a 100K mile pump...
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  #29  
Old 05-18-2013, 04:13 PM
ddeliber ddeliber is offline
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Quote:
Originally Posted by galahad05 View Post
You smell antifreeze in that water?
No, but I can't be sure. I gave it a good sniff on my fingers, but waaaay too much pollen in the air for my nose to be working properly.
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  #30  
Old 05-18-2013, 04:14 PM
ddeliber ddeliber is offline
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Quote:
Originally Posted by fun2drive View Post
Sounds like you have a mechanically driven water pump not electric.
BMW has a good idea with the electric but should would be nice to be at least a 100K mile pump...
Yep. Not sure if this is a good thing or not though.
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  #31  
Old 05-18-2013, 04:23 PM
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thekurgan thekurgan is online now
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Quote:
Originally Posted by ddeliber View Post
Woke up this morning to this (see first attached pic - inside and just in front of the driver's side front wheel).

Haven't even started it up yet, it wasn't overheating yesterday so I don't know the cause. I just went on parts.com and was pleasantly surprised by the price of the water pump $141.25 (mine is a diesel) even though I doubt that this is the problem - small leak (it is water though) and only 25k miles on my 2011. I am dreading diagnosing this though, hopefully it is just condensation or something. Anyone have any thoughts.

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I don't think a failed pump is going to leak like that, it looks more like the expansion tank or hose related. It is a mechanical pump in the diesel, however.
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Last edited by thekurgan; 05-18-2013 at 04:26 PM.
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  #32  
Old 05-18-2013, 04:43 PM
Leekay07 Leekay07 is offline
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the dealer charges less than 1200 for the pump and thermostat replaced and full coolant drain. It comes with 2 years unlimited mile warranty which can't be beaten. My last pump lasted 4 years 2 months from in service date and 127,000
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  #33  
Old 05-18-2013, 04:48 PM
ddeliber ddeliber is offline
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Originally Posted by thekurgan View Post
I don't think a failed pump is going to leak like that, it looks more like the expansion tank or hose related. It is a mechanical pump in the diesel, however.
I did check the reservoir and it is full, the float is all the way to the top. Is there any way this is not coolant?
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  #34  
Old 05-18-2013, 04:54 PM
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thekurgan thekurgan is online now
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Quote:
Originally Posted by ddeliber View Post
I did check the reservoir and it is full, the float is all the way to the top. Is there any way this is not coolant?
Coolant has a unique sweet smell, if you have a cat, make sure that puddle is cleaned up. The best way is to examine from underneath and trace fluid drippings. Did you run the A/C before this happened? Could be water.
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  #35  
Old 05-18-2013, 05:00 PM
ddeliber ddeliber is offline
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Quote:
Originally Posted by thekurgan View Post
Coolant has a unique sweet smell, if you have a cat, make sure that puddle is cleaned up. The best way is to examine from underneath and trace fluid drippings. Did you run the A/C before this happened? Could be water.
I do know what coolant smells like I just can't smell anything right now. I did run the ac for the first time in a while yesterday. But hat was at about 6 pm. I found the puddle this morning at around 11 and it was still slowly dripping. Doesn't 17 hrs seem like a long time here?
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  #36  
Old 05-18-2013, 05:09 PM
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galahad05 galahad05 is offline
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I think you'll just have to monitor things and try out AC-on/AC-off runs over a few days.
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  #37  
Old 05-18-2013, 06:05 PM
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thekurgan thekurgan is online now
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Quote:
Originally Posted by ddeliber View Post
I do know what coolant smells like I just can't smell anything right now. I did run the ac for the first time in a while yesterday. But hat was at about 6 pm. I found the puddle this morning at around 11 and it was still slowly dripping. Doesn't 17 hrs seem like a long time here?
There aren't any thin fluids within the bay, if it's not water, it's most likely coolant, it doesn't smell like water and is colored.
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  #38  
Old 05-19-2013, 05:24 AM
ramblinman ramblinman is offline
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Mike Miller tech expert for the BMW car club used to recommend replacing all BMW water pumps at 60k miles due to their high failure rate beyond that point. His maintenance guidelines dropped that recommendation a few years ago for the e9x cars because he said the cost for replacement of the electric fuel pump is high, and the sensors and controls in the engine will keep the engine from overheating and damaging the motor. If the DME senses the engine is starting to overheat, it will put the car in limp home mode or shut it down. The problem some BMW owners report is that the DME makes these changes while the car is being driven without any warning. Going into limp home at speed on a highway is dangerous. I will probably change mine before it breaks just to avoid being stuck on the side of the road with a car that can't be driven.
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  #39  
Old 05-19-2013, 05:37 AM
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Saintor Saintor is offline
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Quote:
Originally Posted by bbbuzzy View Post
I also have an '06 330i ZSP. My water pump never died but was replaced at 139K at the same time as the thermostat, after the T-stat threw a code on the way to a track inspection, prompting me to deal with it right away.
That's what I gathered from bimmerpost.

Some people said that before failing, the WP¨issued a few low speed codes months ahead. So I check it every 2-3 months.
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  #40  
Old 05-19-2013, 05:55 AM
fb88 fb88 is offline
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I have the OBD2 reader, would that pick up this code?

When this t-stat code showed up did it have a check engine light on? Or you just plug OBD2 in every 2-3 months to see if it pops up anything?

142k miles original pump/thermostat. I was at dealer for service a month ago and they did the read in general but didn't say anything about this.

Last edited by fb88; 05-19-2013 at 06:01 AM.
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  #41  
Old 12-21-2013, 07:09 AM
Boraxo Boraxo is offline
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Just reached 92k miles (almost 8 years) and I got the dreaded temperature light on my 330i after about 15 minutes of driving. Thankfully was able to pull off the freeway in one of the few decent neighborhoods in Oakland and call for a tow. Hoping it is just the water pump though I had noticed a high pitch whine when I started it up. Some coolant bubbled off when I opened the lid so maybe a leak?

My indy shop is quoting $1000 to replace the pump, hoses and thermostat, the local stealerships in the East Bay want $1300-1500.
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  #42  
Old 12-21-2013, 10:50 PM
sptt144 sptt144 is offline
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Quote:
Originally Posted by boramkiv View Post
122,000 miles and still on original water pump with N52. It's had three coolant flushes, and two battery changes. The electric pump can last some time if taken care of.
Of course as I'm typing this the pump will go out tomorrow afternoon at 3:53 PM EST.

I do plan and changing it out along with a few other parts here in a few weeks though.
That is why you are still in good shape. Regular coolant changes definitely extend the life of the pump. I plan on doing the same and proving myself right. Corrossion is definitely the enemy of passages and electronics if infiltrated.
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  #43  
Old 12-21-2013, 10:53 PM
sptt144 sptt144 is offline
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Quote:
Originally Posted by boramkiv View Post
122,000 miles and still on original water pump with N52. It's had three coolant flushes, and two battery changes. The electric pump can last some time if taken care of.
Of course as I'm typing this the pump will go out tomorrow afternoon at 3:53 PM EST.

I do plan and changing it out along with a few other parts here in a few weeks though.
That is why you are still in good shape. Regular coolant changes definitely extend the life of the pump. I plan on doing the same and proving myself right. Corrossion is definitely the enemy of clogging coolant passages and infiltrating electronics that fritz out!
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