Go Back   F150online Forums > Powertrain & Mechanical > V8 Engines
Sign in using an external account
Register Forgot Password?

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 03-24-2008, 09:35 AM
Senior Member
 
Join Date: Oct 2005
Vehicle: 2002 Ford F150
Posts: 449
sound like a tractor trailer

Hello. I have a 2003 Supercrew F150 5.4 and last night my engine started to sound like a tractor trailer. I popped the hood and it looks as the fan will not turn off and it goes with the rpms?(not sure if thats normal) the faster i rev the engine the faster that gets. I assume im find to drve car it is forcing air into engine im just going to use little more gas. Anyone have any clues as to whats going on. It sounds like a big gust of wind (it sounds like when you hear tractor trailer shift and it like woooo then they shift and you hear again. what could that be) I try to get a video
Reply With Quote
  #2  
Old 03-24-2008, 10:01 AM
Senior Member
 
Join Date: May 2007
Location: Statesboro, Ga.
Vehicle: 2001 Ford F150
Posts: 145
Send a message via AIM to OrdnanceCorps Send a message via MSN to OrdnanceCorps Send a message via Yahoo to OrdnanceCorps
Chevy has been doing something like that for ages. Called a centrifgual clutch. When chevys take off they sound like they are going 100 mph. LMFAO

Check out the cluch, belts, pulleys, etc?

Quote:
Centrifugal clutches, some cars and mopeds have a centrifugal clutch, using centrifugal effects to engage the clutch above certain rpm, see Saxomat.
Quote:
A centrifugal clutch works through centrifugal force. The input of the clutch is connected to the engine crankshaft while the output may drive a shaft, chain, or belt. As engine RPM increases, weighted arms in the clutch swing outward and force the clutch to engage. The most common types have friction pads or shoes radially mounted that engage the inside of the rim of a housing.
__________________

U.S. Army Veteran, Patriot. America!

Last edited by OrdnanceCorps; 03-24-2008 at 11:10 AM.
Reply With Quote
  #3  
Old 03-24-2008, 10:09 AM
Technical Article Contributor
 
Join Date: Jan 2007
Location: Vernon, NY
Vehicle: 2007 Ford F150
Posts: 5,749
Does it only do it during a startup or slow speed travel?

Mine only does it when I first start it up in the morning... or if I do around 1600 rpms in a low gear.
Reply With Quote
  #4  
Old 03-24-2008, 10:11 AM
Senior Member
 
Join Date: Feb 2008
Location: Western NC
Vehicle: 1998 Ford F-150
Posts: 1,733
The fan clutch is fluid filled, once a certain temp. is reached the fluid expands into the chambers that cause the clutch to engage. If the ambient temps are very low it can affect the fluid flow, and cause the clutch not to disengage upon crankup.
__________________

Minus the 2 large cats:http://www.youtube.com/watch?v=6RqUGdHwOsc
Other Exhaust Vids:http://www.youtube.com/user/joshmac46
Reply With Quote
  #5  
Old 03-24-2008, 10:13 AM
Senior Member
 
Join Date: Feb 2008
Location: Western NC
Vehicle: 1998 Ford F-150
Posts: 1,733
Quote:
Originally Posted by ManualF150
Does it only do it during a startup or slow speed travel?

Mine only does it when I first start it up in the morning... or if I do around 1600 rpms in a low gear.
Crankup and within the first minute afterward it is normal operation for the clutch to be engaged.
__________________

Minus the 2 large cats:http://www.youtube.com/watch?v=6RqUGdHwOsc
Other Exhaust Vids:http://www.youtube.com/user/joshmac46
Reply With Quote
  #6  
Old 03-24-2008, 10:27 AM
Senior Member
 
Join Date: Jan 2007
Location: Alex Bay, NY
Vehicle: 1997 F150 XLT
Posts: 977
The clutch is probably gone, if you cannot turn it by hand (engine off of course) then something is wrong. I spent the $150 and built my own Efan kit. You dont really need a mech. fan anyways...waste of energy.
Reply With Quote
  #7  
Old 03-24-2008, 11:10 AM
Senior Member
 
Join Date: May 2007
Location: Statesboro, Ga.
Vehicle: 2001 Ford F150
Posts: 145
Send a message via AIM to OrdnanceCorps Send a message via MSN to OrdnanceCorps Send a message via Yahoo to OrdnanceCorps
I'd replace the clutch...
Reply With Quote
  #8  
Old 03-24-2008, 11:34 AM
Senior Member
 
Join Date: Oct 2005
Vehicle: 2002 Ford F150
Posts: 449
Hey guys thanks for the feed back. today i went out and took another look at it and it is really hard to turn the fan. I am thinking that is the clutch and when i do turn it i hear a squel like scrapping metal at some point. i am assuming it is going to fully lock up and just keep spinning one day. My question is i have to drive 1000 miles today and i was wondering if it was ok for me to drive my car like this. I also compared to my sister pathfinder v6 and that fan spins rather easily and my moms volvo s60 and that spins very easily.
Reply With Quote
  #9  
Old 03-24-2008, 12:29 PM
glc glc is offline
Senior Member
 
Join Date: Dec 2006
Location: Joplin MO
Vehicle: 2003 Ford F150
Posts: 28,599
It's safe to drive with a locked up fan clutch as long as the hub isn't wobbling. It's just annoying.
__________________
2003 F-150 XL RCSB 2wd 4.2 M5OD 3.55 LS
Reply With Quote
  #10  
Old 03-24-2008, 12:44 PM
Senior Member
 
Join Date: Nov 2006
Location: spring, texas
Vehicle: 2012 Ford F-150
Posts: 1,032
Fan Clutch

I hate my fan clutch. I hate it more after I replaced it. When it crapped out originally, the fan would ROAR after I came out of a passing gear. It was soooooooooo loud. I replaced it and that stopped. But now the fan roars on start up or when the outside temp. hits about 85. (I have the plastic fan BTW.)
It's been cold for a few days, but when it's warm, that thing spins right up and roars away. Its so stupidly loud. My logic on replacing the clutch instead of going to electric fans was simple. As long as the motor is turning I am getting air.
I should have gone electric. The damn fan actually drowns the sound of my exhaust out when I am cruising around town! If you have to get on the gas to pass or accelerate, that damn clutch ROARS to life. I can tell it is working, but it seems like I actually lose power when it comes on. I think it is the perception that I making all this damn noise but not really accelerating.......

My wifes electric fans work great on her 1999 Mazda Protege ES. It's super quite............no roar.
WTF Ford.
__________________
malexander52
2012 F150 FX2
Super Crew 5.0V8
Reply With Quote
  #11  
Old 03-24-2008, 02:01 PM
Senior Member
 
Join Date: Nov 2006
Location: mass.
Vehicle: 2008 ford 150
Posts: 1,981
i dont think ive ever seen a truck with a stock electric fan.
Reply With Quote
  #12  
Old 03-24-2008, 02:26 PM
Senior Member
 
Join Date: Feb 2006
Location: Windsor, Ont.
Vehicle: 2000 Ford F-150
Posts: 3,762
It shouldn't do this all the time, once in a while maybe and go away after a few hundred feet yes. The clutch has probably gone kaput. It will gobble up gas if it's gone. I like the e-fan kit I installed but even still a new fan clutch isn't that much $$$ and easy to replace. Just because it's hard to turn doesn't mean it's necessarily bad. If it sounds like a 1986 era GMC Astro van or a semi with the fan locked (electrically) then ya, get a new one.
Reply With Quote
  #13  
Old 03-24-2008, 03:26 PM
Senior Member
 
Join Date: Mar 2008
Location: northern MI
Posts: 308
Quote:
Originally Posted by malexander52
I hate my fan clutch. I hate it more after I replaced it. When it crapped out originally, the fan would ROAR after I came out of a passing gear. It was soooooooooo loud. I replaced it and that stopped. But now the fan roars on start up or when the outside temp. hits about 85. (I have the plastic fan BTW.)
It's been cold for a few days, but when it's warm, that thing spins right up and roars away. Its so stupidly loud. My logic on replacing the clutch instead of going to electric fans was simple. As long as the motor is turning I am getting air.
I should have gone electric. The damn fan actually drowns the sound of my exhaust out when I am cruising around town! If you have to get on the gas to pass or accelerate, that damn clutch ROARS to life. I can tell it is working, but it seems like I actually lose power when it comes on. I think it is the perception that I making all this damn noise but not really accelerating.......

My wifes electric fans work great on her 1999 Mazda Protege ES. It's super quite............no roar.
WTF Ford.
My 01 is acting the same way so I think it's time to replace the fan clutch. Try hooking a 10,000 pound trailer behind the wife's protege and see how those fans work
Reply With Quote
  #14  
Old 03-24-2008, 06:53 PM
Senior Member
 
Join Date: Jan 2007
Location: Alex Bay, NY
Vehicle: 1997 F150 XLT
Posts: 977
Quote:
Originally Posted by keith97xlt
i dont think ive ever seen a truck with a stock electric fan.
Our 2005 chevy silverado at work has dual stock electric fans....
Reply With Quote
  #15  
Old 03-24-2008, 08:06 PM
Senior Member
 
Join Date: Mar 2008
Location: northern MI
Posts: 308
Quote:
Originally Posted by NYfordguy
Our 2005 chevy silverado at work has dual stock electric fans....
You'd probably have better luck pulling with the protege. Sorry I had too. If you really use your truck I'd have to say go with the factory fan, If it's transportation You could free up some power and maybee a bit of mileage with an electric.
Reply With Quote
Old 03-24-2008, 08:06 PM


 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are Off


All times are GMT -4. The time now is 02:01 AM.





This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
 
Contact Us Advertising Privacy Statement Terms of Service Jobs Forum Text Archives
Emails & Contact Details