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Shroud

Discussion in 'Early CJ5 and CJ6 Tech' started by willow green, Aug 11, 2017.

  1. Aug 11, 2017
    willow green

    willow green Member

    Yakima,Wasington
    Joined:
    Jan 21, 2013
    Messages:
    63
    Well I'm back at it again, finally got my shroud, and installed it yesterday on my 1967 CJ5, checked the operation of the thermostat and all was well.
    The radiator was as clean as it could be(no corrosion or dirt of any kind) and pressure checked good. I used new hoses, did a much cleaner job than the previous owner.
    I filled the rad. and let it the engine idle until the thermostat started to open (right at 180 deg.), great flow from water pump. I let it idle until the water/antifreeze was just steaming. replaced the rad. cap and let idle for approx. 15 minutes. No leaks, and the temp stayed at 180 deg. for another 10 min. The temp did climb to about 190 deg. in the garage which was at 103 deg. Next a test ride in 103 deg, today.
    So it appears the shroud did help to keep the temp stable. As for the fan, I opted to keep the 5 bladed one over the 4 bladed fan just to see how it would cool, so far so good.
    I do have a question as to how far into the shroud should the fan blades extend. And has anyone ever used a product called water wetter?(I have never heard of this product before) The people that have used this product stated 10-15 deg. reduction in temp. Comments?

    Thanks, Vince
     
  2. Aug 11, 2017
    Rick Whitson

    Rick Whitson Detroit Area 2024 Sponsor 2022 Sponsor

    I live South of...
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    Dec 2, 2014
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    There is such a thing, I may have a bottle. My friend told me that the Ford Trucks with the International Diesel required it, or they would make a hole in the water pump outlet area. I think I sold the truck and never put it in, I will look for and get back with you.
     
  3. Aug 11, 2017
    CJ568

    CJ568 New Member

    Kilgore, TX
    Joined:
    Feb 16, 2016
    Messages:
    6
    I've used it and it does help. It works by breaking the surface tension of the coolant allowing more contact with metal therefore transferring more heat. The downside is that it will find a leak quicker!
     
  4. Aug 11, 2017
    45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Naches, WA
    Joined:
    Mar 31, 2007
    Messages:
    1,103
    Viewed from the side, half of the fan blade should project into the shroud and half out. Check for clearance around the fan blade circumference and to radiator of course to allow for engine movement. Fan blade tip to shroud clearance should be no more than 3/4" but again sufficient to allow for engine movement.
     
  5. Aug 11, 2017
    willow green

    willow green Member

    Yakima,Wasington
    Joined:
    Jan 21, 2013
    Messages:
    63
    As always you guys are a wealth of knowledge,Thanks.
    So Ed, you are from Naches, I'm in Yakima, maybe we could talk sometime?
     
  6. Aug 12, 2017
    45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Naches, WA
    Joined:
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    That would be good. I get to Yakima about once a week or so.
     
  7. Aug 12, 2017
    willow green

    willow green Member

    Yakima,Wasington
    Joined:
    Jan 21, 2013
    Messages:
    63
    Here is my #509-494-1010 mention forum/jeep if you leave a message, as I screen my calls.

    Thanks, Vince
     
  8. Aug 15, 2017
    Zoomer

    Zoomer eJeeper (walking)

    Minnesota
    Joined:
    Sep 22, 2002
    Messages:
    1,088
    There was also a 7 blade version available.....

    [​IMG]
     
  9. Aug 16, 2017
    willow green

    willow green Member

    Yakima,Wasington
    Joined:
    Jan 21, 2013
    Messages:
    63
    What year was that from? And what was the Dia.
    The fan I have now seems to have blades that are not distributed evenly around the hub.
     
  10. Aug 16, 2017
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
    Joined:
    Jul 16, 2007
    Messages:
    938
    The uneven spacing is said to reduce (harmonic) noise and can also allow tools to access components and/or fasteners that would otherwise be obstructed by the fan blades.
     
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