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Fan Shroud For My 72 With A 304 ?

Discussion in 'Intermediate CJ-5/6/7/8' started by Stewart Vaughan, Mar 26, 2022.

  1. Mar 26, 2022
    Stewart Vaughan

    Stewart Vaughan New Member

    Vermont
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    Hi new to the group. I have a 72 cj5 with the 304. I would like to add a fan shroud. The aftermarket one from Omix lists for 74-81 and I believe a 20” fan. Mine has a 5 blade 16” fan. Are there any other options out there?
     
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  2. Mar 26, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Parts support for this era of Jeep is not extensive. You could cross the part number from the '72 parts book to the '74-80 parts book. Both are available.

    https://www.faxonautoliterature.com/1962-1973-Jeep-CJ-DJ-and-Jeepster-Parts-Book-Reprint
    https://www.rockauto.com/en/catalog/jeep,1974,cj5,5.0l+304cid+v8,1309452,literature,part+guide,910

    The '74-80 book is also available on CD-ROM at a somewhat lower price.

    I don't own a '72 vehicle so I have not purchased the parts book that covers it.

    Suggest you might work out a replacement of the fan with a fan that fits the available shroud. Or you could make a shroud from fiberglass. There are a few tutorials for that online. I have the Omix shroud and it does not fit the fan on my '75, though I'm not sure it's original.

    First post! Welcome from eastern Massachusetts.
     
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  3. Mar 28, 2022
    52M38-73CJ5

    52M38-73CJ5 Member

    Wenatchee WA
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    They do not make one for my 73 with the 304. The center line of the fan is about 2/3rds the way down the radiator. I purchased the plastic Omix 74 shroud and cut the bottom of it out to clear the fan. By the end of my first wheeling trip flexing the frame the fan did quite a bit more trimming. I figured a half a shroud is better than nothing. My 360 does not run hot where it did before. If I remember correctly i drilled new mounting holes and had to cut clearance for the lower hose.
     
  4. Mar 29, 2022
    Dale Park

    Dale Park Member

    Utah
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  5. Mar 30, 2022
    FlatlanderCJ5

    FlatlanderCJ5 Member

    Wichita, KS
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    Before I took my jeep apart, I installed a fan shroud from Omix Ada for the AMC v8, mine is a 360.
    I can't recall the exact part number but I just went and looked at it and it has the Omix Ada logo on it, no part number though.
    My jeep is a 73 with a 360 transplant, stock radiator, 7 blade fan with clutch.
    They are out there, I may have bought the one for the 74 hoping it would fit, if I find where I ordered it from, I will post it.
    I did having it running with no clearance issues.
     
  6. Mar 30, 2022
    FlatlanderCJ5

    FlatlanderCJ5 Member

    Wichita, KS
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    Omix-Ada Part #: 17102.03
    I found the other forum where there was a thread regarding a fan shroud for the V8, like mine, the poster had a 7 blade fan. He said the 6 blade and 7 blade were the same diameter.
    Regarding cooling, I watched a car show this weekend and they claimed that a fan shroud should have a slight gap around the mounting surface to increase the air flow instead of being mounting tight against the radiator. Anyone else heard of this?
     
  7. Mar 30, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    One of the poster's above suggests that the AMC V8 fan axis center line is different depending on '72, '73, '74 or '75. I very much doubt that's the case, considering there was no major body or chassis change over those years. No difference between the 360 and original 304 either - the only change to make a 360 is a bigger bore and bigger valves. 304 and 360 crank are the same.

    In the day, i believe you got a shroud with the HD cooling option. I only have a book that covers CJs '74-80, though there is an earlier book available if you can afford/justify the purchase price. The parts book has errors here - they list a 999305 for 80-90 '74-79 V8-WHT-WHDC which does not make sense for a '74-75 80 which never had WHT (with hydramatic transmission). It is the right era of part number, from 1972ish, so I presume that the intermediate part also works for '76-79 V8 CJ-7s with the automatic.

    The 5355678 that is being offered for a '74-ish Jeep is 80-90 '76-79 V8-WMT-WHDC. As we know, everything changes for 1976. Seems likely the aftermarket sellers are selling the '76-79 part and incorrectly claiming it covers the '74-75 V8 CJ. If you actually had the 999305 which seems correct for '74-75, I'm sure it would also be right for a '72 or '73.
     
    Last edited: Mar 31, 2022
  8. Apr 1, 2022
    52M38-73CJ5

    52M38-73CJ5 Member

    Wenatchee WA
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    This gives you the idea of how the fan in my 73 fits compared to a 74 CJ fan shroud. I don't know how the radiator fits in the 72 CJ. My 360 is sitting on the stock motor mounts and I am running the stock radiator. All I can say is somebody changed something. Why who knows. I was surprised to see my fan spinning in front of my frame cross member where it does nothing.

    upload_2022-4-1_18-40-24.jpeg
     
  9. Apr 3, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    I suspect your problem is that the aftermarket sellers are wrong and that's a fan shroud for a '76-79. It does not fit a '74 CJ-5. The part number they give for the Omix shroud is not for a '74. https://midwestjeepwillys.com/5355678.html

    Example: https://www.morris4x4center.com/radiator-fan-shroud-5355678.html

    The factory parts book has occasional mistakes, but it's light years more accurate than the aftermarket listings. The sellers don't know - they are just copying whatever application information the maker of the part gives them. This is Omix's responsibility. Giving the benefit of the doubt, somewhere there was a transcription error.

    You can buy the '74-80 factory parts book and look up these parts yourself. https://www.rockauto.com/en/catalog/jeep,1974,cj5,5.0l+304cid+v8,1309452,literature,part+guide,910 Note that the same book is there as CD-ROM under the repair manual heading for less than half the price of the paper copy.

    You can also buy the parts book that specifically covers a '72 CJ-5: https://www.faxonautoliterature.com/1962-1973-Jeep-CJ-DJ-and-Jeepster-Parts-Book-Reprint However, it's considerably more expensive, and basically everything except emissions equipment, exterior colors and badges for a '72 is the same as a '74.
     
  10. Apr 3, 2022
    52M38-73CJ5

    52M38-73CJ5 Member

    Wenatchee WA
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    This is the shroud I purchased fits 74-81. According to Rock Auto the 73 and 74 take the same radiator. They do not pull up a radiator for a 72.
    Omix-Ada 17102.03 Radiator Fan Shroud

    Im sure the below will help the guy that started this thread. NOT.


    Question:


    will it fit a 1972 304 v8?

    Answer:

    according to the manufacturer's website:
    "
    Radiator Fan Shroud, 304 V8, 74-81 Jeep CJ Models… see more
    By Auto Barn Seller on December 31, 2013

    It fit my 79 with a 304.
    By R. Morgan on December 28, 2013


    no
    By Rick G. on December 30, 2013


    yes
    By zfsmith on December 28, 2013
    Collapse all answers

     
  11. Apr 3, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    The manufacturer is wrong. It does not fit a '74.

    The site I linked to shows the same Omix part number that you replied with, along with the factory part number for a '76-79 Jeep. Not a '74. Omix is misrepresenting the part, for whatever reason.

    Could help the original poster, if he assumed that the listing is correct for a '74, and then inferred that should fit a '72.

    There are articles online about making a fan shroud. Universal fan shrouds are available that could probably work.
    https://www.summitracing.com/search/part-type/fan-shrouds/universal/yes
     
    Last edited: Apr 3, 2022
  12. Apr 4, 2022
    sterlclan

    sterlclan Member 2022 Sponsor

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  13. Apr 4, 2022
    sterlclan

    sterlclan Member 2022 Sponsor

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    [​IMG]
    [​IMG]
    Here it is wrapped with a tshirt waiting for resin notice the offset in both directions as the engine sits offset just a touch. Didn’t take any of the luan form but the link I posted explains it well.
     
  14. Apr 4, 2022
    FlatlanderCJ5

    FlatlanderCJ5 Member

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    I'm getting a little confused with the info...may be all the cough syrup I drank this morning.
    I just went and did some measuring, most of my jeep parts are in the basement, I'm in rebuild mode. This is just for anyone's info that can use it.
    1973 CJ5, V8 (360) but I understand the measurements are the same, 304 vs. 360. Factory power steering, brakes.
    Heavy duty cooling, stock radiator, 3 row, cleaned and rodded out. I was told it was the original, has the overflow port pointing towards driver's side.
    7 blade fan with clutch, diameter just a tick below 19 inches.
    Fan shoud, Omix Ada 17102.03. Hole opening diameter, just over 21 inches.
    As I said, I did have it running (poorly) before the big rebuild started and there were no clearance issues with the fan and it fit very well into the shroud, the blades were about half way into the opening. front to back.

    It appears there were a couple of different types of fans. Hope this helps anyone.
     
  15. Apr 7, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    My book shows a 4-blade fixed fan standard, and a 7-blade fan with fan clutch for HDC option. This also includes a fan shroud, PN 999305. Same radiator for both.
     
  16. Apr 7, 2022
    Dale Park

    Dale Park Member

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    Tim, would you happen to know the part# for the fan clutch? I originally bought a Hayden fan clutch and the shaft is quite long(about 1 3/4") and I only have about 1/2" between radiator and fan. Hoping the original if available would have a shorter shaft. Thanks
     
  17. Apr 7, 2022
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    Sigh ... you know you can buy the '74-80 parts book on CD-ROM at RockAuto for less than $25?

    I have that book, and a J-series book that covers 1972, that's free to read and download on the Tom Collins site.

    From those sources, it should be a 998761. I can not look up a model 80 for '72, but I'd guess it's the same. The actual '72 CJ book is available from Faxon if someone who owned a Jeep from that era felt it would help them.
     
  18. Feb 21, 2024
    John Waits

    John Waits New Member

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    Fan Shroud question!

    I just purchased a 1973 CJ5 survivor and was surprised that it did not have a fan shroud. It has the 304 V8 and also has the 7 blade fan with clutch. Is there any chance that the Jeep may have come new without a fan shroud?

    Sorry if this is a stupid question! I have owned many late CJ's, YJ's, and too many TJ's to remember, but this early CJ is a whole different animal and I'm experiencing a large learning curve! Info on intermediates seems to be a needle in a haystack!

    Any help would be greatly appreciated!
     
  19. Feb 21, 2024
    52M38-73CJ5

    52M38-73CJ5 Member

    Wenatchee WA
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  20. Feb 21, 2024
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Heavy duty cooling option from the factory included 7 blade fan, fan clutch, and the fan shroud.
    That's not to say that a previous owner at some point removed the 4 blade fan for the 7 blade fan...
    and fan clutch.
     
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