1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Cj3a Radiator Recommendation

Discussion in 'Flat Fender Tech' started by houleyh, Dec 31, 2021.

  1. Dec 31, 2021
    houleyh

    houleyh New Member

    Quebec
    Joined:
    Jun 30, 2020
    Messages:
    39
    Hi, I need to replace a radiator on a CJ3A. I saw some at Ebay at $129 and others at $500??. What is good and sufficient? Anyone had experience with All aluminum (No shroud ) units?

    Youra advices woud be appreciated. Thanks Yvan
     
  2. Dec 31, 2021
    timgr

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

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,428
    Did you search? Lots of discussion of this in previous posts.

    https://www.bing.com/search?q=site:earlycj5.com+mustang+fiero+radiator+

    The brass/copper commodity radiator has been replaced with the same item made from plastic and aluminum. If not available (ie for a Mustang), you could try on Mustang specialist sites for a replacement.

    Radiators are typically sized based on the power the engine can produce. If you look on Summit or Jegs, there are plenty of aluminum radiators along with measurements and (I presume) some indication of the engine power. Either try the applications suggested in old posts, or measure for a hot rod radiator: https://www.summitracing.com/search...tOrder=Ascending&keyword=radiator&kr=radiator
     
    Last edited: Dec 31, 2021
  3. Dec 31, 2021
    duffer

    duffer Rodent Power

    Bozeman, MT
    Joined:
    Sep 17, 2009
    Messages:
    3,563
    Whether brass or aluminum, you still want to use a shroud. It significantly increases the efficiency of the radiator. In my experience, welded, all aluminum radiators are probably 15 to 20% more efficient that an identical sized brass version. And you do not want one with plastic tanks. As Tim posted, do a search. There should be a lot of information on this site.
     
    ojgrsoi and dnb5853 like this.
  4. Dec 31, 2021
    boopiejones

    boopiejones I can’t drive 55

    California east bay
    Joined:
    Mar 16, 2020
    Messages:
    416
    jeeper50 likes this.
  5. Jan 2, 2022
    ojgrsoi

    ojgrsoi Retired 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Weatherford, TX
    Joined:
    Dec 30, 2002
    Messages:
    2,178
    I used an aluminum radiator from eBay on my M38. It is a bottom mount. Make sure your lower mounting and bottom hose mounting is the same and you will do fine.
    You will need to be creative with your shroud mounting. Mine had no provision for that. I used foam tape as a spacer along with cable ties to secure the original shroud to the new radiator.
    on your hoses you may find oem doesn’t fit the lower outlet because of the angle. I don’t remember what I did but you might have to use a flex radiator hose. (Sorry Mortske)
     
  6. Jan 2, 2022
    duffer

    duffer Rodent Power

    Bozeman, MT
    Joined:
    Sep 17, 2009
    Messages:
    3,563
  7. Jan 4, 2022
    cj2atruck

    cj2atruck Member

    Spokane, WA
    Joined:
    Dec 12, 2020
    Messages:
    56
    I'm not a big fan of aluminum radiators, as we've had too many leaks on a V8 hemi conversion on my son's JK.

    For my Little cj2a truck conversion, I opted for a new radiator for a 1965 mustang with a 289. I also use a push type fan from summit mounted on the front of the radiator, so no shroud is needed. Pretty simple to fab mounts, and it has plenty of capacity to keep my Buick 232 cool.

    Spent a week in Moab over Thanksgiving, and never had a cooling issue. I do not use a thermostat to cycle the fan off and on, just set it up on a relay so it runs all the time if the jeep is running.

    We also had an unusually hot summer, and jeep stayed at 185 degrees.
     
  8. Jan 4, 2022
    jackdog

    jackdog Member 2021 Sponsor 2020 Sponsor

    Finger Lakes NY
    Joined:
    Jul 16, 2013
    Messages:
    485
  9. Jan 4, 2022
    Buster1

    Buster1 Member

    Ft Worth
    Joined:
    Aug 8, 2021
    Messages:
    53
    Not to hijack this thread, but how do you guys drain your radiator? Last time I did it, I loosened the small release valve at the bottom. No quick release, I had to turn it many times. Fluid went everywhere, I mean everywhere! As it began to loosen, fluid sprayed out sideways, then once I got the stopper out the rushing fluid went a new direction (none of it in the funnel). There was just no way to get a controlled stream and direct it to my buckets. :oops:

    How do you do it?
     
  10. Jan 4, 2022
    cj2atruck

    cj2atruck Member

    Spokane, WA
    Joined:
    Dec 12, 2020
    Messages:
    56
    You might try a big square or round pan about 6 inches deep and just pull the bottom hose. Your going to make somewhat if a mess no matter what, so might as well make the process fast.

    I have a container about 3 feet round by 6 inches deep and works pretty well.
     
    Buster1 likes this.
  11. Jan 5, 2022
    jackdog

    jackdog Member 2021 Sponsor 2020 Sponsor

    Finger Lakes NY
    Joined:
    Jul 16, 2013
    Messages:
    485
    cj2atruck likes this.
  12. Jan 5, 2022
    timgr

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

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,428
    Yeah, I'd just pull the bottom hose if there was no tap.

    Suggest you don't hijack and instead post a new thread with your question.
     
New Posts