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304 Fan

Discussion in 'Intermediate CJ-5/6/7/8' started by dvader, Aug 1, 2019.

  1. Aug 1, 2019
    dvader

    dvader Member

    Northern Nevada
    Joined:
    Jul 20, 2006
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    199
    My 74 CJ5 has a factory 304 in it. I have been thinking about adding a radiator fan shroud and a fan clutch to it in order to keep tall brush and deep water from getting to the fan. My fan is a 4 blade fan. Most parts directories show that a 304 should have a 6 blade fan. Anyone else have a 4 blade fan on their 304? Any comments about adding fan clutch? TIA.
     
  2. Aug 1, 2019
    sterlclan

    sterlclan Member 2021 Sponsor

    exploring the...
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    Have a six blade and clutch on my 74 far as I can tell it came that way. Made my own shroud out of fiberglass. Jp magazine had an excellent tutorial a few years back. They did theirs the same way I made mine ( the Jeep wasn’t my first).
     
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  3. Aug 1, 2019
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Medford Mass USA
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    4 bladed fan plus a spacer is original, without the heavy duty cooling (HDC) option. With HDC has a 7-blade fan, fan clutch and shroud. This is according to the factory Jeep '74-80 parts book.

    You might be able to find those parts either used or aftermarket. IIRC the shroud and clutch are available new, and the correct fan can likely be sourced used. This won't help with deep water - you'll still need to disconnect the fan belt. An electric fan that you can shut off with a switch on the dash is the usual remedy.
     
  4. Aug 1, 2019
    dvader

    dvader Member

    Northern Nevada
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    Jul 20, 2006
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    Thanks!
     
  5. Aug 3, 2019
    hunter blacksmith

    hunter blacksmith Sleepin’ Jeeper

    Valley springs,ca
    Joined:
    May 23, 2019
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    59
    I found out an electric fan works the best and makes it very roomy under the hood
     
  6. Aug 8, 2019
    4wealn

    4wealn Member

    Ontario, Canada
    Joined:
    Nov 15, 2013
    Messages:
    136
    Get a fan out of a ford contour or mercury mystique. It is a dual fan with lots of pulling power and fits a cj rad to a tee. Just make sure you pull the fuse holder for it as it is a higher amp fuse. I cannot quite remember what years. Google it and you will get all the info.
     
  7. Aug 9, 2019
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
    Joined:
    Dec 6, 2010
    Messages:
    437
    100% on this mod, have run one on my 360 for 6 years without ever an issue. Agree on the fuseholder as it will draw around 40amps on start up. Also ensure you run through a heavy duty relay and size your cable correctly
     
  8. Aug 9, 2019
    johneyboy03

    johneyboy03 The green beast

    Quebec, Canada
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    Jan 15, 2011
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    1,966
    Never had alternator problem ?

    I had to upgrade the alternator for a cs144 to make sure i dont draw the battery
     
  9. Aug 10, 2019
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
    Joined:
    Dec 6, 2010
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    437
    I'm not running a standard alternator, it's a Jap aftermarket one i made fit so use to higher amp circuits
     
  10. Aug 12, 2019
    johneyboy03

    johneyboy03 The green beast

    Quebec, Canada
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    good to know :)
     
  11. Aug 20, 2019
    nwedgar

    nwedgar Now with TBI!

    Newnan, Georgia
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    I also did the Ford Contour fan for awhile. It worked great until one of the fans flaked out on me during a road trip. I limped home since only one fan was working, at least I had that. Had to keep stopping to let the Jeep cool down. That's the only drawback of exclusively electrical and using older vehicle fans. I went back to mechanical for that reason.

    I would think that your fan clutch would allow slippage if you hit deep water though. I've had my Jeep in water past the alternator (in a 360) and haven't had a problem.
     
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