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





 

Post Reply
 
Thread Tools Search this Thread
      08-16-2015, 08:29 PM   #1
highbrowed
Boost Addict
highbrowed's Avatar
335
Rep
1,244
Posts

Drives: 135i 6MT w/ N54 Delete
Join Date: Jul 2014
Location: South Florida

iTrader: (4)

Radiator fan running on full blast all the time

Other morning I drove to work (3 miles) and it was 69 degrees, pretty cool. When I parked, the radiator fan was running on full blast. I stopped and restarted the car, and the fan was still running.

I have since discovered that when I start the car up cold, the fan won't come on, but it will come on after a few minutes of driving, regardless if the AC is on or not.

Anyone experienced this symptom? I'm going to be replacing both the water pump and thermostat, but wanted to see if someone has seen this issue before.
Appreciate 0
      08-16-2015, 08:52 PM   #2
BMW135pls
First Lieutenant
BMW135pls's Avatar
United_States
90
Rep
341
Posts

Drives: Bucket of screws and sadness
Join Date: Jul 2014
Location: NJ, USA

iTrader: (0)

There is a setting in the JB4 which makes the fan run full blast at all times. It's called MAX cool mode. Check it and make sure you don't have it enabled.
__________________
Model: '08 135i N54 6AT Coupe ///M Sport - E85 + 93 = E30
Mods: AA DPs + Gen I - BMS JB4 (Race + Map 2) + DCI + OCC - Cobb CP - ///M RSFB + Front Control Arms - Koni Yellow - Swift Spec R - Vorshlag camber plates - MPSS 225/255 - x-ph Angel Eyes 160w
Appreciate 1
      08-16-2015, 09:34 PM   #3
Dmak
Second Lieutenant
Canada
67
Rep
252
Posts

Drives: 09 135
Join Date: Nov 2014
Location: Edmonton alberta

iTrader: (1)

check for fault codes. sounds like water pump about to go. can be the rad fan itself too. also check coolant level.
Appreciate 1
      08-17-2015, 01:32 PM   #4
highbrowed
Boost Addict
highbrowed's Avatar
335
Rep
1,244
Posts

Drives: 135i 6MT w/ N54 Delete
Join Date: Jul 2014
Location: South Florida

iTrader: (4)

Quote:
Originally Posted by Dmak View Post
check for fault codes. sounds like water pump about to go. can be the rad fan itself too. also check coolant level.


Curiously there's no codes. Just saw there's a way to output the water temp to the fuel gauge using the jb4. Gonna see what temps i get later with some further testing.

http://www.n54tech.com/forums/showthread.php?t=10605
Appreciate 0
      08-17-2015, 06:05 PM   #5
Pig Farmer
Major
340
Rep
1,293
Posts

Drives: E92M
Join Date: May 2010
Location: Florida

iTrader: (0)

Quote:
Originally Posted by highbrowed View Post
Curiously there's no codes. Just saw there's a way to output the water temp to the fuel gauge using the jb4. Gonna see what temps i get later with some further testing.

http://www.n54tech.com/forums/showthread.php?t=10605
When your car is cold, loosen the coolant reservoir cap and run the water pump prime procedure...

1) Put the key fob in the ignition, press start button to turn on the electrical system but don't start the car. In other words, keep your feet off the clutch/brake pedal.

2) Move the temp setting on the A/C to full heat, and turn the fan to the lowest setting.

3) Hold your foot down on the gas pedal for 5-10 seconds. The water pump will start to cycle on and off for several minutes to prime the system and remove air from the hoses. Once it starts, you can remove your foot from the gas.

Leave the car door and hood open so you can check to see if the water pump is working. You should hear it running, and you should see water pissing into the reservoir from the thin hose connected on the right side of the tank. If the pump sounds funny or you don't see spay in the reservoir, your pump is dying/dead. Just remove the key to stop the process. If you plan on letting the water pump continue the priming process, make sure to hook up a battery charger. Running the fan and water pump at the same time will drain your battery in no time.
Appreciate 2
TM9030121.50
      08-18-2015, 02:14 AM   #6
guru_method
Eating M3s for breakfast
guru_method's Avatar
No_Country
46
Rep
299
Posts

Drives: AW 09 135i M
Join Date: Nov 2011
Location: Dallas, TX

iTrader: (4)

Had the same symptoms and turned out to be the water pump.
Appreciate 1
      08-18-2015, 02:51 AM   #7
Dackelone
European Editor
Dackelone's Avatar
Germany
10512
Rep
22,992
Posts

Drives: N54 e82
Join Date: Feb 2010
Location: Bayern, Germany

iTrader: (1)

Waterpump going out...
Appreciate 1
      08-18-2015, 08:37 AM   #8
135i OREO
Lieutenant
Germany
26
Rep
439
Posts

Drives: 2009 BMW 135i
Join Date: Sep 2010
Location: Spangdahlem, Germany

iTrader: (3)

Garage List
2009 BMW 135i  [0.00]
Water pump! Be careful! I give it a week before you get the 1/2 eng light and your car shuts off.
__________________
2009 BSM 135i 6MT
Appreciate 1
      08-18-2015, 06:52 PM   #9
highbrowed
Boost Addict
highbrowed's Avatar
335
Rep
1,244
Posts

Drives: 135i 6MT w/ N54 Delete
Join Date: Jul 2014
Location: South Florida

iTrader: (4)

Quote:
Originally Posted by Pig Farmer View Post
When your car is cold, loosen the coolant reservoir cap and run the water pump prime procedure...

1) Put the key fob in the ignition, press start button to turn on the electrical system but don't start the car. In other words, keep your feet off the clutch/brake pedal.

2) Move the temp setting on the A/C to full heat, and turn the fan to the lowest setting.

3) Hold your foot down on the gas pedal for 5-10 seconds. The water pump will start to cycle on and off for several minutes to prime the system and remove air from the hoses. Once it starts, you can remove your foot from the gas.

Leave the car door and hood open so you can check to see if the water pump is working. You should hear it running, and you should see water pissing into the reservoir from the thin hose connected on the right side of the tank. If the pump sounds funny or you don't see spay in the reservoir, your pump is dying/dead. Just remove the key to stop the process. If you plan on letting the water pump continue the priming process, make sure to hook up a battery charger. Running the fan and water pump at the same time will drain your battery in no time.


Thanks for this, you're a smart man.


Quote:
Originally Posted by 135i OREO View Post
Water pump! Be careful! I give it a week before you get the 1/2 eng light and your car shuts off.


That's what people are telling me! Luckily I am heeding the warnings and the 1er is safely parked in the garage awaiting a water pump and thermostat.

Really glad I didn't get stranded and need a tow, looks like I'm driving the e36 for the week.

Thanks for the input guys, I'll report back once I've swapped out the water pump to confirm it was the root cause for my symptoms.
Appreciate 0
      08-21-2015, 08:35 AM   #10
Miko226
Captain
Miko226's Avatar
United_States
60
Rep
722
Posts

Drives: 11' 335d
Join Date: Nov 2012
Location: Boca Raton, FL

iTrader: (0)

Water pump is about to leave you stranded somewhere unless you have Max Cool turned on if you have JB4
__________________
11' m57 335d 165k Miles - JR 2, ATM Full Exhaust & Intake, Wagner FMIC, AAR Boost Pipe, AAR Swirl Delete, AAR EGR Delete

08' n54 135i FBO E85 - SOLD
Appreciate 0
      08-21-2015, 09:22 AM   #11
cedavis34
Private
2
Rep
54
Posts

Drives:
Join Date: Apr 2008

iTrader: (0)

This just happened to me as well. I noticed when I parked the car last night, the fan was on full blast, but didn't think much of it.

Drove to work this morning, noticed a flat spot in power in 3rd gear, but no failures or warnings. Put the window down and turned the radio off to listen to the car, and noticed the fan was running full blast again. Started to suspect water pump problem. Eventually got a yellow temperature warning, coasted to a stop and parked the car for 10 minutes.

Restarted, drove the rest of the way to work very slowly. Now I'm debating on getting it towed home or limping it home through the back roads...

Mine lasted 98k miles
Appreciate 0
      08-22-2015, 09:59 PM   #12
highbrowed
Boost Addict
highbrowed's Avatar
335
Rep
1,244
Posts

Drives: 135i 6MT w/ N54 Delete
Join Date: Jul 2014
Location: South Florida

iTrader: (4)

Changed the water pump and thermostat, fan is back to normal, issue resolved. That top bolt on the water pump is a major PITA with big hands, but otherwise, the install was pretty straightforward.



Appreciate 0
      08-22-2015, 11:56 PM   #13
JS135
Private
JS135's Avatar
Canada
7
Rep
74
Posts

Drives: 2009 135i M-Sport
Join Date: Jan 2014
Location: Toronto

iTrader: (0)

Good to hear it's fixed! Was about to cast my vote for water pump / thermostat. Had that problem just recently.
Appreciate 0
      09-21-2015, 01:45 PM   #14
714_2er
Lieutenant
714_2er's Avatar
108
Rep
487
Posts

Drives: 2015 AW M235i
Join Date: Jun 2013
Location: SoulCal, 714

iTrader: (0)

Good ol'water pump failure.
Mine failed just last week (79k) in the recent SoCal heat wave. My cAr was showing the same signs for a couple of weeks prior.
Appreciate 0
      09-21-2015, 04:53 PM   #15
Ginger_Extract
California-bound
Ginger_Extract's Avatar
United_States
383
Rep
1,480
Posts

Drives: BMW 135i
Join Date: Jan 2013
Location: Los Angeles, CA

iTrader: (3)

Quote:
Originally Posted by highbrowed View Post
Curiously there's no codes. Just saw there's a way to output the water temp to the fuel gauge using the jb4. Gonna see what temps i get later with some further testing.

http://www.n54tech.com/forums/showthread.php?t=10605
FYI 205 is normal operating temp for water on these cars. If you hijack the fuel gauge, that's the "1/4 tank" mark.
__________________
Streets of Willow: 1:27.7 CW 11/15/15; 1:29.5 CCW 8/15/15 |||| Autoclub Speedway ROVAL (CCW): 1.52.6 - 12/2/17
Willow Springs - Big Willow (CW): 1:35.8 - 3/31/18 |||| Buttonwillow #13 (CW): 1:59.3 1/27/18
https://www.facebook.com/JakeStumphRacing |||| http://www.youtube.com/user/RaceMeMZ3
Appreciate 0
      10-19-2015, 07:25 PM   #16
highbrowed
Boost Addict
highbrowed's Avatar
335
Rep
1,244
Posts

Drives: 135i 6MT w/ N54 Delete
Join Date: Jul 2014
Location: South Florida

iTrader: (4)

Quote:
Originally Posted by Ginger_Extract View Post
FYI 205 is normal operating temp for water on these cars. If you hijack the fuel gauge, that's the "1/4 tank" mark.
Good info here. Thanks!
Appreciate 0
      11-24-2020, 01:50 AM   #17
jkoning
Enlisted Member
United_States
4
Rep
32
Posts

Drives: 07 335i 6MT e92
Join Date: May 2019
Location: california

iTrader: (0)

Cooling fan always on

Hi guys,

My cooling fan/radiator fan is always running while the car is on. I replaced the water pump and thermostat and IBS sensor but still persists.
The codes read
2e85 Missing water pump
2e8b missing IBS
2e98 missing alternator

My car maintains normal running temps even after long distance drives, but the fan NEVER turns on while the car is on

Any help is greats appreciated
Appreciate 0
      11-24-2020, 11:26 AM   #18
dtla1
Colonel
dtla1's Avatar
826
Rep
2,232
Posts

Drives: 2011 135i, Space Grey
Join Date: Apr 2014
Location: Silicon Valley

iTrader: (2)

Quote:
Originally Posted by jkoning View Post
Hi guys,

My cooling fan/radiator fan is always running while the car is on. I replaced the water pump and thermostat and IBS sensor but still persists.
The codes read
2e85 Missing water pump
2e8b missing IBS
2e98 missing alternator

My car maintains normal running temps even after long distance drives, but the fan NEVER turns on while the car is on

Any help is greats appreciated
In your last sentence did you mean "but the fan NEVER turn off*"?

I wonder if this could be a relay issue maybe, but I'm not familiar with the electrical system there if it's always on or always off on the non-switched side.
Appreciate 0
      11-25-2020, 01:47 AM   #19
jkoning
Enlisted Member
United_States
4
Rep
32
Posts

Drives: 07 335i 6MT e92
Join Date: May 2019
Location: california

iTrader: (0)

Quote:
Originally Posted by dtla1 View Post
Quote:
Originally Posted by jkoning View Post
Hi guys,

My cooling fan/radiator fan is always running while the car is on. I replaced the water pump and thermostat and IBS sensor but still persists.
The codes read
2e85 Missing water pump
2e8b missing IBS
2e98 missing alternator

My car maintains normal running temps even after long distance drives, but the fan NEVER turns on while the car is on

Any help is greats appreciated
In your last sentence did you mean "but the fan NEVER turn off*"?

I wonder if this could be a relay issue maybe, but I'm not familiar with the electrical system there if it's always on or always off on the non-switched side.
Quote:
Originally Posted by dtla1 View Post
Quote:
Originally Posted by jkoning View Post
Hi guys,

My cooling fan/radiator fan is always running while the car is on. I replaced the water pump and thermostat and IBS sensor but still persists.
The codes read
2e85 Missing water pump
2e8b missing IBS
2e98 missing alternator

My car maintains normal running temps even after long distance drives, but the fan NEVER turns on while the car is on

Any help is greats appreciated
In your last sentence did you mean "but the fan NEVER turn off*"?

I wonder if this could be a relay issue maybe, but I'm not familiar with the electrical system there if it's always on or always off on the non-switched side.
Yes my bad "it never turns off"

Right when I turn it on it starts blowing. I've been struggling with this issue for a while and I'm unsure what the cause could be.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 10:23 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST