How to fix a squeaky CCU fan - Rennlist - Porsche Discussion Forums

Notices

How to fix a squeaky CCU fan

Reply

Old 06-22-2005, 01:05 AM
  #1
bhensarl
Jarhead
Rennlist Member

Thread Starter
 
bhensarl's Avatar
 
Join Date: Nov 2003
Location: Del Mar, CA
Posts: 1,439
Default How to fix a squeaky CCU fan

One day riding home from work with my roommate a horrible squealing/squeaking sound began emanating from somewhere behind the dashboard. I was understandably worried and perturbed, probably as much from the mechanics bill I was sure was awaiting me as from the smug grin on my friend's face since he was also imagining my new bill. Well, thanks to some time and a little help from this forum I found the cure. It didn't cost me anything and only took about 45 minutes.
Brian
bhensarl is offline  
Reply With Quote
Old 06-22-2005, 01:13 AM
  #2
bhensarl
Jarhead
Rennlist Member

Thread Starter
 
bhensarl's Avatar
 
Join Date: Nov 2003
Location: Del Mar, CA
Posts: 1,439
Default

Tools:
-Phillips screwdriver
-Metric socket set (I can't remember exactly which size socket I used, but I know it was small maybe 7mm or 8mm? )
-Radio removal tool: These are two little U-shaped pieces of metal that fit into the holes on either side of the CCU and allow you to slide it out. Cost me $5 at the local auto parts store, but you can make your own out of coat hangers if you're really cheap, errrr.... frugal.
-Grease: I just used the Mobil 1 synthetic I had lying around
-Rags

Time:
About 45-60 mins if you take your time and don't scratch up the interior or break the CCU.

This pic shows the underside of the CCU. The fan is circled.
Attached Images  
bhensarl is offline  
Reply With Quote
Old 06-22-2005, 01:19 AM
  #3
bhensarl
Jarhead
Rennlist Member

Thread Starter
 
bhensarl's Avatar
 
Join Date: Nov 2003
Location: Del Mar, CA
Posts: 1,439
Default

Step 1:
Insert the radio removal tools on either side of the CCU and push them in until you can pull it out of the dash. Have a few rags standing by so that you can stuff them in between the unit and the trim so it doesn't get marred.

Step 2:
Remove the two large plugs from the back right hand side of the CCU. It's fairly self-explanatory once you have a look at it. The plugs are hinged to one side. With the plugs removed, remove the unit from the dash.
bhensarl is offline  
Reply With Quote
Old 06-22-2005, 01:25 AM
  #4
bhensarl
Jarhead
Rennlist Member

Thread Starter
 
bhensarl's Avatar
 
Join Date: Nov 2003
Location: Del Mar, CA
Posts: 1,439
Default

Step 3:
The fan is attached to the unit with two hex bolts. Remove them, set them aside, and disconnect the electrical connection to the rear of the unit. There is also a small piece of rubber tubing which directs air from the outlet of the fan to the interior of the CCU. Remove that as well.
Attached Images  
bhensarl is offline  
Reply With Quote
Old 06-22-2005, 01:31 AM
  #5
bhensarl
Jarhead
Rennlist Member

Thread Starter
 
bhensarl's Avatar
 
Join Date: Nov 2003
Location: Del Mar, CA
Posts: 1,439
Default

Step 4:
The fan is held together by two small phillips screws (circled in yellow on the fan. Also visible in yellow on the right side is the rubber tube that directs air to the inside of the CCU, and in purple is the hex socket I used to remove the two bolts in Step 3. See, I told you it was small. ). Remove these two and the fan will come apart into three pieces: the top metal portion, the fan itself, and the bottom black portion.
NOTE: Do not lose the small hex nuts the screws thread into. They can fall out of the fan housing if you aren't careful, and they're small enough to be difficult to find once lost.
The fan has spindles on each end that fit into holes in the other two pieces. Lube up the spindle and the holes with some grease on the end of a q-tip or toothpick.

Step 5:
Put that sucker back together in the same order you took it apart.

I did mine about a month ago and it's been quiet as a mouse ever since. Hopefully it will last, and if it doesn't, it's not hard to pull it back out and do it again. At any rate, when I checked the fans were special order parts and if I remember correctly cost $150-200 a piece. My fix was much cheaper.
Brian
Attached Images  
bhensarl is offline  
Reply With Quote
Old 06-22-2005, 05:57 AM
  #6
warmfuzzies
Super User
 
warmfuzzies's Avatar
 
Join Date: Jun 2002
Location: colchester UK
Posts: 2,423
Default

Whilst you're there you might as well open the front cover and blow some air through cleaning the air sensors and the insides of the CCU.


kevin.
warmfuzzies is offline  
Reply With Quote
Old 06-22-2005, 10:37 AM
  #7
Smokin
User
 
Smokin's Avatar
 
Join Date: Oct 2002
Location: Pasadena, MD - Land of Taxes
Posts: 1,879
Default

Brian... Excellent write-up! Thanks!
Smokin is offline  
Reply With Quote
Old 06-22-2005, 12:49 PM
  #8
bhensarl
Jarhead
Rennlist Member

Thread Starter
 
bhensarl's Avatar
 
Join Date: Nov 2003
Location: Del Mar, CA
Posts: 1,439
Default

Kevin,
I was going to do that, but I couldn't get the temp button off, and I really didn't want to risk doing any more damage than was absolutely necessary.
Brian
bhensarl is offline  
Reply With Quote
Old 06-22-2005, 03:56 PM
  #9
Pascal
User
 
Pascal's Avatar
 
Join Date: Apr 2005
Location: Belgium
Posts: 37
Default

Excellent Brian!!!
Thanks for sharing.

Pascal
Pascal is offline  
Reply With Quote
Old 06-23-2005, 12:47 AM
  #10
Jerry Garwick
User
 
Join Date: Sep 2002
Location: Prather, California: somewhere in the middle of the State
Posts: 293
Default

Brian

When I do something like remove the CCU (ayear ago) I just throw all the parts in a big bowl and replace most of them when rebuilding. I figure anything left over were not really necessary if the thing still works. I currently have the pax window regulator all over the garage floor and car floor. I know I'll have a few screws left over. How many depends on how much beer consumed.

Do you always take pictures?
Jerry Garwick is offline  
Reply With Quote
Old 10-17-2006, 03:51 PM
  #11
Smokin
User
 
Smokin's Avatar
 
Join Date: Oct 2002
Location: Pasadena, MD - Land of Taxes
Posts: 1,879
Default

In an effort to track down my code for Inside Sensor Motor I figured I would take this out and follow Brian's lead. What a great write-up! It is as easy as it looks. I had a slight problem getting the plugs loose on the back. I think that it was the first time it had ever been taken out.

I haven't checked my codes yet but the fan was dry as a bone with NO lube on it.

Brian... Thanks again for the great write-up!
Smokin is offline  
Reply With Quote
Old 10-17-2006, 05:40 PM
  #12
asimler
User
 
asimler's Avatar
 
Join Date: Jun 2004
Location: London
Posts: 308
Default

Great write up and pics.
many thanks
Anthony
asimler is offline  
Reply With Quote
Old 10-17-2006, 05:43 PM
  #13
MarkD
Addict
Rennlist Member
 
MarkD's Avatar
 
Join Date: Sep 2005
Location: Still here...
Posts: 6,963
Default

Rick, what is the symptom for this problem? Constant squeaking or only when fan is running?
I have an occasional squeak I think is the blower fan... varies with blower fan speed. Pretty sure it is the blower fan 'cause it is harder to fix
MarkD is offline  
Reply With Quote
Old 10-17-2006, 06:08 PM
  #14
Smokin
User
 
Smokin's Avatar
 
Join Date: Oct 2002
Location: Pasadena, MD - Land of Taxes
Posts: 1,879
Default

Mark... I am not 100% sure. However... A squeaky fan is one sign. I don't recall ever hearing my fan being on! That in conjunction with a code I was getting (45 - Inside Sensor Blower Motor) made me think to try this after looking through the DIY section and seeing how easy Brian made it look.

Hmmmm... Interesting. I am running the Diagnostic Interface as I type here to see if this fixed my problem. The code is not reappearing but when I tried all the various climate control settings my car would not accept changes while the Scantool was hooked up to the car and in "Climate Control" mode. It was stuck with the heat and fan on full blast! I needed to shut down Scantool and turn off the car to reset the system!

However.. My code is now clear apparently!

Last edited by Smokin; 10-18-2006 at 09:50 AM.
Smokin is offline  
Reply With Quote
Old 10-17-2006, 06:18 PM
  #15
jimq
Burgled
Rennlist Member
 
jimq's Avatar
 
Join Date: Aug 2003
Location: Altamonte Springs, Fl/Gwynns Island, Va.
Posts: 22,137
Default

Rick I think about everybody seems to get code 45. I dont know if its a real fault or not. Mine comes and goes.
jimq is offline  
Reply With Quote
 

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Darkstar1
Parts Marketplace
3
03-03-2017 12:45 PM
Bill P.
993 Forum
3
07-09-2002 03:34 AM


Thread Tools
Search this Thread
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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -3. The time now is 10:40 PM.


Copyright ę 1998 - 2017 Rennlist.com We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: