Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-12-2019, 08:18 PM
Loperamide's Avatar
Member
 
Join Date: Jul 2017
Location: UK
Posts: 124
Loperamide is on a distinguished road
Aux Fan not spinning

Aux Fan is not spinning when A/C is turned on. The aux fan is fully functional as it spins full speed when I unplug the high pressure sensor with A/C switched on.

A/C compressor clutch spins and the gas pressures have been tested by a garage. However no ice cold air.

One thing I have noted is there is a loud bang/click when i turn the A/C on? What could this noise be?
__________________
2003 X5 4.4i
Reply With Quote

Sponsored Links

  #2  
Old 01-12-2019, 08:30 PM
Crowz's Avatar
Premier Member
 
Join Date: Aug 2017
Location: Alabama
Posts: 2,041
Crowz is on a distinguished road
Quote:
Originally Posted by Loperamide View Post
Aux Fan is not spinning when A/C is turned on. The aux fan is fully functional as it spins full speed when I unplug the high pressure sensor with A/C switched on.

A/C compressor clutch spins and the gas pressures have been tested by a garage. However no ice cold air.

One thing I have noted is there is a loud bang/click when i turn the A/C on? What could this noise be?
If the aux fan makes any difference what so ever in how well the ac cools then the clutch fan is on the way out.

The thing is completely optional in my opinion as long as the clutch fan is working. Doesn't hurt to have it but the clutch fan handles the job fine. I put a new one on the wife's x5 when I first bought it and it died a year later. Ac cools great without it but I did replace the mechanical clutch fan as it wasn't working that great. After replacing the clutch fan the a/c blows snowballs. Electric aux fan is still dead and will stay that way

Now all of that said it IS required to be there and plugged up for the a/c to work at all on some models at least. They fail in one of two states. Either dead (the good way to go) or wide open (the bad/useless way to fail).

When they die via the not coming on you can just forget its there in my opinion and everything works fine.

When they die in the wide open way you have a problem. Because if you unplug the fan to stop it continuously running wide open even with the key off your a/c compressor wont engage. The one on the wife's car I had replaced died that way which was annoying. Luckily I had the original none running fan and removed the blades from the electric motor and plugged it in while leaving the other one mounted. This way the a/c worked. I tucked the motor housing into the fender for now. I will fiddle with it at a later date since it works fine and didn't have time to do anything else when it failed.

Anyways with yours not coming and the a/c working I would test the mechanical fan clutch if its not cooling like it should. Its probably shot but the good news is its cheap to replace and pretty easy to change out.
__________________
Just BMW's - All cars and trucks was two pages long
1994 318is
1997 528i
2000 323i
2001 X5 3.0 auto
2005 X5 3.0 auto
2013 X5 xdrive35 Turbo
More are at my website

Aftermarket E53 Radio Install
Reply With Quote
  #3  
Old 01-12-2019, 08:32 PM
Crowz's Avatar
Premier Member
 
Join Date: Aug 2017
Location: Alabama
Posts: 2,041
Crowz is on a distinguished road
On the click noise that is probably the clutch kicking in on the compressor. But I have never hear it referred to as a bang noise. More of a solid click sound.
__________________
Just BMW's - All cars and trucks was two pages long
1994 318is
1997 528i
2000 323i
2001 X5 3.0 auto
2005 X5 3.0 auto
2013 X5 xdrive35 Turbo
More are at my website

Aftermarket E53 Radio Install
Reply With Quote
  #4  
Old 01-12-2019, 08:33 PM
Loperamide's Avatar
Member
 
Join Date: Jul 2017
Location: UK
Posts: 124
Loperamide is on a distinguished road
Quote:
Originally Posted by Crowz View Post
If the aux fan makes any difference what so ever in how well the ac cools then the clutch fan is on the way out.

The thing is completely optional in my opinion as long as the clutch fan is working. Doesn't hurt to have it but the clutch fan handles the job fine. I put a new one on the wife's x5 when I first bought it and it died a year later. Ac cools great without it but I did replace the mechanical clutch fan as it wasn't working that great. After replacing the clutch fan the a/c blows snowballs. Electric aux fan is still dead and will stay that way

Now all of that said it IS required to be there and plugged up for the a/c to work at all on some models at least. They fail in one of two states. Either dead (the good way to go) or wide open (the bad/useless way to fail).

When they die via the not coming on you can just forget its there in my opinion and everything works fine.

When they die in the wide open way you have a problem. Because if you unplug the fan to stop it continuously running wide open even with the key off your a/c compressor wont engage. The one on the wife's car I had replaced died that way which was annoying. Luckily I had the original none running fan and removed the blades from the electric motor and plugged it in while leaving the other one mounted. This way the a/c worked. I tucked the motor housing into the fender for now. I will fiddle with it at a later date since it works fine and didn't have time to do anything else when it failed.

Anyways with yours not coming and the a/c working I would test the mechanical fan clutch if its not cooling like it should. Its probably shot but the good news is its cheap to replace and pretty easy to change out.
Hi crowz, the clutch fan works fine.
__________________
2003 X5 4.4i
Reply With Quote
  #5  
Old 01-12-2019, 08:53 PM
Crowz's Avatar
Premier Member
 
Join Date: Aug 2017
Location: Alabama
Posts: 2,041
Crowz is on a distinguished road
Have you tried stopping it while the motor is running?

I usually use a rolled up newspaper or a broom (the end with the bristles not the handle) to stop the fan if it stops easily and especially if it takes a second or so to speed back up when released its toast.

Just watching it spin isn't going to tell you if its working right or not.

A correctly working mechanical fan clutch on bmw's will pull enough air across the condenser to cool it enough to make the a/c work correctly.
__________________
Just BMW's - All cars and trucks was two pages long
1994 318is
1997 528i
2000 323i
2001 X5 3.0 auto
2005 X5 3.0 auto
2013 X5 xdrive35 Turbo
More are at my website

Aftermarket E53 Radio Install
Reply With Quote
  #6  
Old 01-12-2019, 09:09 PM
andrewwynn's Avatar
Premier Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 2,905
andrewwynn is on a distinguished road
Electric fan is just backup in case vehicle speed and clutch fan isn't enough to do the job. It's programed to come on when core temp gets hot than normal operating temp. I think the fan turns like 1/4 revolution when the key is turned to on to test it.
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #7  
Old 01-12-2019, 09:14 PM
andrewwynn's Avatar
Premier Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 2,905
andrewwynn is on a distinguished road
When my thermostat failed open and it was below freezing out I stuffed a piece of foam into the clutch fan to keep of from moving in addition to cardboard in the grill so the engine coukd get to closed loop and I could get cabin heat.

I think the clutch fan does very little to cool the engine over about 80 kph.
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #8  
Old 01-12-2019, 09:59 PM
upallnight's Avatar
Member
 
Join Date: Aug 2012
Location: Cook County
Posts: 6,236
upallnight is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
Electric fan is just backup in case vehicle speed and clutch fan isn't enough to do the job. It's programed to come on when core temp gets hot than normal operating temp. I think the fan turns like 1/4 revolution when the key is turned to on to test it.
Actually, the fan spin up and then power is removed from the fan when a DC motor freewheel, it becomes a generator and the electrical voltage is sent to the DME. The DME uses the electrical signal to verify that the fan is good. No electrical signal would mean a bad fan to the DME and the DME will log a trouble code for the fan.
__________________
2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
Reply With Quote
  #9  
Old 01-13-2019, 07:24 AM
Member
 
Join Date: Aug 2017
Location: ny
Posts: 26
tttomttt is on a distinguished road
On 2 of my vehicles both of which are M54's the aux fan stopped working. With A/C on and a hot humid summer day the temp gauge would rise when stopped at a traffic light. I was able to source a decent aftermarket fan for the X from FCP euro (name brand) and swap it out. The beauty here is the FCP guarantee for life. On the 330xi the price for the fan was significantly higher so I opted for a well reviewed fan from Amazon. The swap out cured the overheating issue immediately. Of course it is up to you the path you take.
Reply With Quote
  #10  
Old 01-13-2019, 07:26 AM
Member
 
Join Date: Aug 2017
Location: ny
Posts: 26
tttomttt is on a distinguished road
Forgot to mention that both cars are automatic with clutch fans that were serviceable.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 03:10 PM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.