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Dumb question: fan on backwards?

Discussion in 'The Hokey Ass Message Board' started by Bahumut, Mar 25, 2012.

  1. Bahumut
    Joined: Jun 28, 2009
    Posts: 42

    Bahumut
    Member

    This f100 runs hot according to the stock temp gauge. Trying to figure somethings out and the neighbor thought the fan was pointing the wrong way? I thought, "why and how would it be pointing the wrong way?" but figured I'd post a picture just to be sure..

    [​IMG]

    Thanks in advance
     
  2. Fire it up and drop a tissue in front of the rad. It sucks in to the rad, your good to go. Blows the tissue away. You've got it on backwards.
     
  3. Rebel 1
    Joined: Oct 25, 2010
    Posts: 568

    Rebel 1
    Member

    What chopped said. Fan shroud would not hurt neither.
     
  4. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 33,596

    Jalopy Joker
    Member

    multi blade fan, shroud, correct thermostat, good hoses, etc will help too. post more pics of engine/truck
     
  5. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    The angle would be the same either way but the scooped ends would catch more air if it was flipped. A 1" longer spacer may help a little too.
     
  6. For some reason I don't like trying to figure fans out. Yes, test it. You need a tissue? ;)
     
  7. squirrel
    Joined: Sep 23, 2004
    Posts: 59,212

    squirrel
    Member

    that fan is on the correct way.

    The gage could be inaccurate, the engine or radiator could be plugged, thermostat could be weak, and it probably could use a fan shroud.
     
  8. mashed
    Joined: Oct 15, 2011
    Posts: 1,473

    mashed
    Member
    from 4077th

    New thermostat and radiator cap couldn't hurt. Flush out the cooling system and fill with proper coolant mix.
     
  9. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    Didn't notice the curl in the blades at first. squirrels right about the fan being correct as is.
     
  10. Engine man
    Joined: Jan 30, 2011
    Posts: 3,480

    Engine man
    Member
    from Wisconsin

    Seems like the curl at the tip of the blade would dump air off the end without a shroud.
     
  11. 49ratfink
    Joined: Feb 8, 2004
    Posts: 22,755

    49ratfink
    Member
    from California

    I keep an aftermarket temp gauge in my toolbox that I know is good just for these occasions. it is always good to get a second opinion before you start spending a bunch of money on parts you might not need.
     
  12. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,485

    landseaandair
    Member
    from phoenix

    I'm now thinking it may have been a safety measure with the exposed fan to deflect fingers and such.
     
  13. Engine man
    Joined: Jan 30, 2011
    Posts: 3,480

    Engine man
    Member
    from Wisconsin

    A cheap infra red thermometer makes things easier to find.
     
  14. slammed
    Joined: Jun 10, 2004
    Posts: 8,150

    slammed
    Member

    Is the temp fine on the hi-way? Then air flow would be key. The big three (brakes,fuel,cooling) systems are priority when resurrecting the old rides. Go through them completely. No band-aids. Yes a 1" spacer should go on it too.
     
  15. Pop-Rodder
    Joined: Oct 6, 2011
    Posts: 325

    Pop-Rodder
    Member

    If it's much more than an inch from the radiator, it's not going to suck very much air through it. Also, as said before, a shroud would help tremendously. Double check your spacing. BTW, it's mounted correctly.
     
  16. 40FordGuy
    Joined: Mar 24, 2008
    Posts: 2,907

    40FordGuy
    Member

    Agree with Squirrel..... and add a shroud. Did those Ford trucks come with a "pan" under the front of the engine? (Anyone?) '54 thru '56 pass cars had one...to keep the under car airflow from moving up behind the radiator. Most of those were removed during generator replacement, and many never reinstalled.

    4TTRUK
     
  17. 40FordGuy
    Joined: Mar 24, 2008
    Posts: 2,907

    40FordGuy
    Member

    Ps; It IS mounted correctly! The curved blade tips were to help keep fan noise to a minimum.

    4TTRUK
     
  18. Bahumut
    Joined: Jun 28, 2009
    Posts: 42

    Bahumut
    Member

    y'all are wonderful.
    I live near LMC, so I use their parts catalog like a bible, but don't see a shroud made for the '59. I assume these are easy to construct so maybe I'll try that. As far as the spacers, where does one find those?

    Here's another phone pic.
    [​IMG]
     
  19. squirrel
    Joined: Sep 23, 2004
    Posts: 59,212

    squirrel
    Member

    I look in my little cardboard box that says "fan spacers" where I put all the spacers I take off of cars.

    You may not have one of those....
     
  20. craftscustoms
    Joined: Mar 16, 2005
    Posts: 219

    craftscustoms
    Member

    speedway motors has em.
     
  21. atomickustom
    Joined: Aug 30, 2005
    Posts: 3,407

    atomickustom
    Member

    Most any auto parts store should have fan spacers. Try NAPA or O'Reilly.
     
  22. Take a tape measure to a pick-a-part salvage yard, and you can probably find an OEM fan shroud that is close enough to adapt to your truck (donor vehicle with a radiator core close to the size of the one in your truck). Also check your hoses--aging hoses could be collapsing and restricting flow, or thermostat could be bad. You will be surprised at how much the fan shroud helps--it's good to run one even if the lack of one is not causing your current problem. The shroud will make the fan pull more air through the radiator.
     
  23. need louvers ?
    Joined: Nov 20, 2008
    Posts: 12,901

    need louvers ?
    Member

    One of our most vaunted tech guys here on the board accidently put a reverse rotation fan on the 427 Chevy in his then rough and ready '63 Merc truck many years back. Had some serious problems with over heating for a few days before he finally realized his mistake... I would tell you who it is but I just don't feel it would be right to mention ElPolacko's name here at this time! Nothing like the feeling of throwing good friend under the buss...
     
  24. Bahumut
    Joined: Jun 28, 2009
    Posts: 42

    Bahumut
    Member

  25. Bahumut
    Joined: Jun 28, 2009
    Posts: 42

    Bahumut
    Member

    uh.. noted, LOL :D
     
  26. squirrel
    Joined: Sep 23, 2004
    Posts: 59,212

    squirrel
    Member

    I keep my left hand fans in a separate pile from my right hand fans...they stack better that way
     
  27. sunbeam
    Joined: Oct 22, 2010
    Posts: 6,383

    sunbeam
    Member

    Is it getting hot at slow or high speed slow speed usally not enough air flow high speed the radiator. Oh and turning the fan around will not change the direction of air flow just make less efficient.
     
  28. Bahumut
    Joined: Jun 28, 2009
    Posts: 42

    Bahumut
    Member

    According to the factory gauge, it gets hot just sitting there at idle. I then went and rode with the wifey to see if it would get hot quicker while riding around in stop n' go, or at higher speeds with less traffic lights and signs.

    Made no difference. The needle would rise past the H in about 20 minutes.
     
  29. squirrel
    Joined: Sep 23, 2004
    Posts: 59,212

    squirrel
    Member

    Sounds like the fan isn't your problem.
     
  30. Bahumut
    Joined: Jun 28, 2009
    Posts: 42

    Bahumut
    Member

    great... If it ain't one thing, it's like six or seven others.
     

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