Skip Navigation Links
Setup
New Post
Search
Forum Home
Home
Decoder

Original Message
And the answer is :
By Wayne K. - 05/28/2004 12:31:59 AM; IP 4.240.21.3
A lot of guys pitch the clutch fan in favor of the lighter flex type fans (I'm guilty too) but here's what can happen.

At idle everything works as advertised. The flex fan draws air through the radiator, hopefully surrounded by the shroud. But what happens on the freeway to some folks is that the flex type fan actually becomes a BLOCKAID to air trying to pass through the radiator because the fan is turning slower, pulling air through SLOWER than the air would ram it's way through if you were using a clutch type fan. That's why clutch fans exist. They intentionally disengage at freeway speeds to keep the air passing unhindered though the radiator.

Flex fan freeway heating is especially noticeable on cars/trucks with numerically less gearing. Pull of the freeway and disconnect your flex fan and drive it another 20 miles to see if that's the problem. If it stays cool then that is your problem. My big block runs slightly warmer on the freeway for this exact reason.
This thread, so far...
Skip Navigation Links.
Collapse <a href=../ForumFE/reply.aspx?ID=21602&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21602" onclick="return false;">Getting hot on freeway but not idling in city</a>&nbsp;-- <font color=#0000ff>Steve M, <i>05/24/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21602', contentMargin: 60, icon: $('anchor21602') }); </script>  Getting hot on freeway but not idling in city -- Steve M, 05/24/2004
Collapse <a href=../ForumFE/reply.aspx?ID=21605&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21605" onclick="return false;">RE: Getting hot on freeway but not idling in city</a>&nbsp;-- <font color=#0000ff>Tony P., <i>05/24/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21605', contentMargin: 60, icon: $('anchor21605') }); </script>  RE: Getting hot on freeway but not idling in city -- Tony P., 05/24/2004
Collapse <a href=../ForumFE/reply.aspx?ID=21612&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21612" onclick="return false;">yes, timing will do it but another common issue is</a>&nbsp;-- <font color=#0000ff>hawkrod, <i>05/24/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21612', contentMargin: 60, icon: $('anchor21612') }); </script>  yes, timing will do it but another common issue is -- hawkrod, 05/24/2004
Collapse <a href=../ForumFE/reply.aspx?ID=21616&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21616" onclick="return false;">Another thing to check</a>&nbsp;-- <font color=#0000ff>Royce, <i>05/25/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21616', contentMargin: 60, icon: $('anchor21616') }); </script>  Another thing to check -- Royce, 05/25/2004
 royce, if your lower hose is colapsing.... -- hawkrod, 05/25/2004
 A rusty 'spring' has no bearing on the matter. See related... -- Mr F, 05/26/2004
 RE: yes, timing will do it but another common issue is -- Dano, 05/25/2004
Collapse <a href=../ForumFE/reply.aspx?ID=21624&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21624" onclick="return false;">RE: Getting hot on freeway but not idling in city</a>&nbsp;-- <font color=#0000ff>giacamo, <i>05/25/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21624', contentMargin: 60, icon: $('anchor21624') }); </script>  RE: Getting hot on freeway but not idling in city -- giacamo, 05/25/2004
Collapse <a href=../ForumFE/reply.aspx?ID=21629&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21629" onclick="return false;">please reread my response....</a>&nbsp;-- <font color=#0000ff>hawkrod, <i>05/25/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21629', contentMargin: 60, icon: $('anchor21629') }); </script>  please reread my response.... -- hawkrod, 05/25/2004
Collapse <a href=../ForumFE/reply.aspx?ID=21643&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21643" onclick="return false;">RE: please reread my response....</a>&nbsp;-- <font color=#0000ff>giacamo, <i>05/26/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21643', contentMargin: 60, icon: $('anchor21643') }); </script>  RE: please reread my response.... -- giacamo, 05/26/2004
 in those cases the colapsing hose is.... -- hawkrod, 05/26/2004
Collapse <a href=../ForumFE/reply.aspx?ID=21646&Reply=21602><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor21646" onclick="return false;">RE: Getting hot on freeway but not idling in city</a>&nbsp;-- <font color=#0000ff>Travis Miller, <i>05/27/2004</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=21646', contentMargin: 60, icon: $('anchor21646') }); </script>  RE: Getting hot on freeway but not idling in city -- Travis Miller, 05/27/2004
 Crossflow radiator -- Steve M, 05/28/2004
And the answer is : -- Wayne K., 05/28/2004
Post A Response
Name:
Email Address:
Subject:
Post:
Upload Image:
Human Check:   Enter the code 202471414 in the box