[vilord]

what codes would show up for a failing pump?
if my car doesn't put out much hot air at idle, but is fine once revved up a bit, is that related to the pump, or the thermostat? I think i need a thermostat regardless...

[OTO335i]

Originally Posted by vilord

what codes would show up for a failing pump?
if my car doesn't put out much hot air at idle, but is fine once revved up a bit, is that related to the pump, or the thermostat? I think i need a thermostat regardless...

That could be that you possibly have little air pockets in your system. I had this happen on my A4 when I used to own one and I had to make sure there was no more air in my system and it fixed the issue.

Trying performing a coolant bleed to get all the air out of the system.

[Efthreeoh]

Originally Posted by vilord

what codes would show up for a failing pump?
if my car doesn't put out much hot air at idle, but is fine once revved up a bit, is that related to the pump, or the thermostat? I think i need a thermostat regardless...

Here's the codes I discovered back in 2011 from my thread (which is a good source regarding the water pump issues for the N52).

https://www.e90post.com/forums/showt...=561183&page=2

"Okay, so I can't post my BT scan pages because I saved them to my shop computer as a doc image file and E90 post doesn't accept that file format.

Anyway here's synopsis of what happened and what codes are involved.

There is a fault code 2E81 'Electrical Cooling Pump:Speed Deviation' that has shown up several times as follows:

May 14, 2011 Scan: (I cleared these codes after the scan)
Note: The pump's max RPM is 250
138053 miles - speed deviation of 54 RPM
138153 miles - speed deviation of 45 RPM
143447 miles - speed deviation of 19 RPM

June 11, 2011 Scan: (I cleared these codes after the scan)
143452 miles - speed deviation of 56 RPM
143467 miles - speed deviation of 74 RPM
145927 miles - speed deviation of 51 RPM

July 23, 2011 Scan (This scan was to clear the codes before I replaced the pump)
145952 miles - speed deviation of 87 RPM
145987 miles - speed deviation of 59 RPM
149521 miles - water pump revolution of 0 RPM (the pump stopped car overheated)
- speed deviation of 250 RPM

A second code was present: 2E82 'Electrical Cooling Pump: Switch Off'
149521 miles - water pump temperature electronics 77 deg C (170 F)

So basically, if you get code 2E81, replace the pump soon.

I hope this information helps all of us understand the water pump better"

[pjr710]

Originally Posted by Efthreeoh

Here's the codes I discovered back in 2011 from my thread, which is a good source regarding the water pump issues for the N52.

https://www.e90post.com/forums/showt...=561183&page=2

'Okay, so I can't post my BT scan pages because I saved them to my shop computer as a doc image file and E90 post doesn't accept that file format.

Anyway here's synopsis of what happened and what codes are involved.

There is a faut code 2E81"Electrical Cooling Pump:Speed Deviation" that has shown up several times as follows:

May 14, 2011 Scan: (I cleared these codes after the scan)
Note: The pump's max RPM is 250
138053 miles - speed deviation of 54 RPM
138153 miles - speed deviation of 45 RPM
143447 miles - speed deviation of 19 RPM

June 11, 2011 Scan: (I cleared these codes after the scan)
143452 miles - speed deviation of 56 RPM
143467 miles - speed deviation of 74 RPM
145927 miles - speed deviation of 51 RPM

July 23, 2011 Scan (This scan was to clear the codes before I replaced the pump)
145952 miles - speed deviation of 87 RPM
145987 miles - speed deviation of 59 RPM
149521 miles - water pump revolution of 0 RPM (the pump stopped car overheated)
- speed deviation of 250 RPM

A second code was present: 2E82 "Electrical Cooling Pump: Switch Off"
149521 miles - water pump temperature electronics 77 deg C (170 F)

So basically, if you get code 2E81, replace the pump soon.

I hope this information helps all of us understand the water pump better'

awesome information

[Efthreeoh]

Originally Posted by dmatre

What you unfortunately don't factor into your statistical analysis is the number of people who have NOT suffered a failure around 100k.

If you analyze all of the posts where the pump failed at 100k, then you have a 100% failure rate at 100k miles.

But that's not how statistics work. You have to take the number of failures divided by the total number of vehicles produced with > your 'magic mileage'.

To the OP: if you're concerned, scan the codes. If no codes, enjoy the trip. If codes, replace then enjoy the trip. Why would you own a car that you can't trust to get you home from every trip?

This is exactly the point. If 100,000 miles was the statistic mean, there would not be deviation of +/- 50,000 miles as I have and others have reported. A steadfast 100,000 mile failure of the N52 pump is just not accurate. For the OP to base his decision on such statistical evidence is stupid.

[pjr710]

This thread is insane. FWIW I willfully ignored any major stuff on my car until my water pump failed at around 100k.

My battery died one day and I started the car everything was reset and I got a over heat warning. O thought it was all related. It then went away. After that I drove a solid week and then I was stranded and had to get towed.

To be clear I always took care of the vehicle. I just never took a close look like a doctor until after that happened. Once I did I realized I had a OFHG slow leak, and questionable valve cover leak all whi h was replaced amongst more.

Before that I drove the car to Florida from PA and back. I never questioned the reliability.

What is said above is all you can do. Also just get more "hands on" or sell the car if you aren't capable of doing it yourself or paying someone to.

Also every single car will hVe the same type of "issue" anything can go wrong on any car at any time. The more u know about the vehicle and the more you can diagnose and do preventative stuff the better.

[porsche959]

Alright slight update - didn’t make it to Chicago...(plans changed).

Instead, I took it on a 700 mile trip from NYC to DC, Shenandoah National Park and back to NYC.

Car ran flawlessly!

Will probably do the NYC Chicago round trip sometime next year.

[Efthreeoh]

Originally Posted by porsche959

Alright slight update - didn’t make it to Chicago...(plans changed).

Instead, I took it on a 700 mile trip from NYC to DC, Shenandoah National Park and back to NYC.

Car ran flawlessly!

Will probably do the NYC Chicago round trip sometime next year.

Where did you go in the park?

[pjr710]

awesome!

do like others said and check your codes. if you wanted to replace the water pump to feel better that wouldn't be a bad idea either.

also read up on other maintenence items you should do like OFHG, potentially serpentine belt, etc

[Jesda]

I'd only be concerned if it was a 335.

[Spitfire007]

I beat the living hell out of my 328 (6MT) every day I drive it. Just saw waaaay over triple digits.
It's not really complaining so far, though NYC did work its magic on my suspension, even the B6 Bilsteins...

Never had a water pump failure YET, and never have I done gaskets.

Soon to get sent to body shop for cleanup and new rear bumper, and for some other little stuff (slightly warped rotors).
Otherwise it's my commuter from Philly to Baltimore...rain or shine, with sustained 90mph Speed. At least.

95000 miles on it.

[pjr710]

Originally Posted by Spitfire007

I beat the living hell out of my 328 (6MT) every day I drive it. Just saw waaaay over triple digits.
It's not really complaining so far, though NYC did work its magic on my suspension, even the B6 Bilsteins...

Never had a water pump failure YET, and never have I done gaskets.

Soon to get sent to body shop for cleanup and new rear bumper, and for some other little stuff (slightly warped rotors).
Otherwise it's my commuter from Philly to Baltimore...rain or shine, with sustained 90mph Speed. At least.

95000 miles on it.

Way over triple digits ... 95k. Does not compute. You mean 195k?

[Efthreeoh]

Originally Posted by pjr710

Way over triple digits ... 95k. Does not compute. You mean 195k?

I believe he is alluding to driving over the speed limit in excess of 100 MPH, which for a sport-package E90 (non M3) is 150 MPH max (if it had 10 miles of road )

[Spitfire007]

Originally Posted by Efthreeoh

I believe he is alluding to driving over the speed limit in excess of 100 MPH, which for a sport-package E90 (non M3) is 150 MPH max (if it had 10 miles of road )

It's not 10 miles with a 3 stage intake and a BPC tune helping....this things was seriously smoking this am.

[pjr710]

Originally Posted by Spitfire007

It's not 10 miles with a 3 stage intake and a BPC tune helping....this things was seriously smoking this am.

Lol. I commute my 335 and am leaning towards a 328 as a commuter. To “save” my motor to put a big single turbo on it. Not sure if it’ll happen tho

[porsche959]

Originally Posted by Efthreeoh

Where did you go in the park?

Checked out some caverns and mainly just drove around the mountains. It was nice, but slightly disappointed in terms of the actual driving roads - not enough twisties.

[Efthreeoh]

Originally Posted by porsche959

Checked out some caverns and mainly just drove around the mountains. It was nice, but slightly disappointed in terms of the actual driving roads - not enough twisties.

That's my neck of the woods. Plenty of good roads to drive, just not the tourist ones.