Fan Clutch - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 04-28-2012, 02:32 PM
quadrajunk a name earned
 
Last photo:
Join Date: Nov 2009
Location: Parts Unknown
Posts: 338
Wiki Edits: 0

Thanks: 3
Thanked 10 Times in 10 Posts
Fan Clutch

Is there a way to test a fan clutch to see if it's slipping? Can fan clutches be repaired or is it a matter of buying a new one? Car is 70 LeMans 400.

bt

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-28-2012, 09:57 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Replace if there's an excessive wobble, fluid leakage or if it tends to freewheel even when hot. Or if there is an excessive/over heating problem w/the engine and there is no other explanation. I'd be real surprised if one of the manufacturers didn't have a troubleshooting guide on fan clutches.

If it's OE to the car or you cannot remember ever changing it, it's probably time to replace.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-29-2012, 06:42 AM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,747
Wiki Edits: 0

Thanks: 4
Thanked 64 Times in 62 Posts
As Cobalt327 said, there are directions online about how to check it for freewheeling and lockup. However, as they get older they usually lose fluid and the lockup delays to a higher temp. I have an older clutch that still works, but doesn't fully engage until about 225 degrees. I swapped in a newer one that engages at about 200 degrees and it works much better to keep engine temps stable.

You can also usually buy a clutch for the same vehicle in at least three versions (normal, HD, severe duty). I usually go for severe duty on my truck because I have to deal with 100+ ambient temps with the AC running. You may be able to get by with normal or HD.

Bruce
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-29-2012, 08:38 AM
quadrajunk a name earned
 
Last photo:
Join Date: Nov 2009
Location: Parts Unknown
Posts: 338
Wiki Edits: 0

Thanks: 3
Thanked 10 Times in 10 Posts
non-thermal fan clutch

I have a non-thermal steel plate face fan clutch (no coil spring) that came with the car. I don't know if it's OEM but I haven't replaced it.

My 180 deg thermostat actually opens at 190. I checked it with a thermometer. The engine has been running at 195 deg after 10 minutes of run time. When I shut the engine off warm and hand rotate the fan it turns with less force than when cold. Not sure if it's time to replace the fan clutch or not? I suppose I could keep an eye on the temp and see if it gradually rises then I can decide on replacement? Car is located in Houston, TX.

In case any one else has the same questions here is a fan clutch trouble shooting guide;

http://www.haydenauto.com/Installati...s/Content.aspx

bt

Last edited by beertracker; 04-29-2012 at 08:47 AM. Reason: trouble shooting guide
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-29-2012, 02:30 PM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,747
Wiki Edits: 0

Thanks: 4
Thanked 64 Times in 62 Posts
I'd let it go for now, and see what happens when it gets hot. My cooling system is in good shape, and it was fine last year until about July. At that point I saw the idle temp get up to about 220-225 before the fan fully engaged and started bringing it down. That was too high for me to be comfortable that it was not going to keep rising and overheat.

With the new fan clutch and a 195 degree thermostat I can hear the fan clutch starting to engage at about 200, and the temp tops out at about 205-210.

Bruce
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fan Clutch? 71 c-10 Engine 10 10-06-2008 09:51 AM
Fan Clutch DoubleVision Engine 2 08-20-2005 12:58 PM
Clutch Fan malibuman66 Engine 18 01-01-2005 10:09 AM
Fan to Clutch earthworm Engine 3 09-27-2004 03:46 PM
electric fan or clutch fan?? mancinator Engine 4 06-02-2004 02:49 PM


All times are GMT -6. The time now is 09:01 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.