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Radiator Overflow Tank Options

Discussion in 'Early CJ5 and CJ6 Tech' started by Snoops, Nov 14, 2020.

  1. Lockman

    Lockman OK.....Now I Get It . 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Timgr,
    Yes Sir........ That's the one I got from our FLAPS. Different styliee , but from Dorman.

    * Note: to All . This works as sorta , kinda, an expansion tank. The hose goes in the bottom. Hot coolant overflows to the reservoir tank. When it cools , it creates a siphon to draw it back thru to the radiator.
     
  2. mickeykelley

    mickeykelley Well-Known Member

    Even if you do over fill it, it will flow out until it reaches its desired level. Mine just looses some somewhere where I never see evidence but during summers it will get low on its own and then starts to run a little hotter, I add a little and goes back to normal for the next couple months, depending on how much I’m driving it. Not really a big deal, but just not as new cars in that respect.
     
  3. scott milliner

    scott milliner Master Fabricator

    Found an early photo of mine. I just bolted the metal cage to the inner fender.
    [​IMG]
     
  4. Glenn

    Glenn Kinda grumpy old man Staff Member

    Have you got a 7# cap on yours? Assuming you're not finding any trace of moisture in the oil, how about the exhaust. Any signs of moisture coming out of it?
     
  5. Jw60

    Jw60 That guy 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Regular cap. Hose to bottom of recovery tank.
    Your recovery tank just needs to be big enough for whatever your system needs.
    Otherwise it will still cycle over the recovery capacity then pull the recovery empty and have air In the radiator
     
  6. Oldriginal86

    Oldriginal86 Member

    The main reason for a recovery bottle is to keep air out of the cooling system. Air promotes oxidation which causes deterioration of cooling system components.
    Modern standard radiator caps all have the vacuum valve necessary for a recovery system.
     
  7. Glenn

    Glenn Kinda grumpy old man Staff Member

    Never considered the air that would be in an older system.
     
  8. SFaulken

    SFaulken Active Member

    IMG_20201115_132620-1.jpg IMG_20201115_132627-1.jpg Sorry it took me a few, here's some pics of the catch can I use.
     
    Jonbbrew and Fireball like this.
  9. Snoops

    Snoops Making progress, slow but at least it's forward! 2024 Sponsor 2023 Sponsor 2022 Sponsor

    That bottle looks like a clean install, I like how little room it takes up. Thanks for the pics
     
  10. mickeykelley

    mickeykelley Well-Known Member

    That’s what I’m tellin ya. It just slowly disappears. I’ve looked everywhere. I've even laid out paper towels trying to catch a glimpse. It's magic, OR the wife sneaks out in the middle of the night every once in awhile and takes a little out. I’ve even hidden a camera behind my crescent wrench trying to catch a shot, but no luck so far. But I believe she's behind the mystery. I’m thinking I need to move the camera to a better hiding place. Maybe behind the hammer. She’ll never think to find it there.
     
    dozerjim, Jw60, Glenn and 1 other person like this.
  11. Downs

    Downs Rattlecan All The Things!

    Most likely it's a small leak around a hot part of the engine and it evaporates before it ever gets to the ground.
     
  12. Glenn

    Glenn Kinda grumpy old man Staff Member

    You didn't say you have an overflow catch bottle so why not at least set up some kind of temporary one?
     
  13. 45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    I'm cheap. I made my overflow tank out of PVC pipe and fitting. I also add a site glass to be able to check fluid level in the tank. I may have invested $10.00 to build it.

     
    dozerjim, Ohiowrangler, Downs and 3 others like this.
  14. nickmil

    nickmil In mothballs.

    I made one out of an old metal water bottle and a bicycle water bottle mount I had laying around. Even put a sight tube in it. I think I'm in it around $10 as well.
     
    dozerjim and 45es like this.
  15. SFaulken

    SFaulken Active Member

    Yeah, I think that bottle cost me about $30, plus freight, but I'm sure I was ordering more than just that, so the freight really doesn't figure into it for me.
     
  16. ziv

    ziv Member

    Twin2 likes this.
  17. Lockman

    Lockman OK.....Now I Get It . 2024 Sponsor 2023 Sponsor 2022 Sponsor

    X2......the answer.
     
  18. sterlclan

    sterlclan Member 2024 Sponsor 2022 Sponsor

    gutted an old fire extinguisher and used that
     
    Fireball likes this.
  19. boopiejones

    boopiejones I can’t drive 55

    E6F99AC5-372E-4B2D-8EB1-9012E5AC6AB8.jpeg
    I was considering one of those big cans of malt liquor. It’s cheap enough that I could just dump the booze and use the can. But I had a sailor Jerry bottle lying around so I used that.
     
    LayemStr8, ITLKSEZ, Twin2 and 2 others like this.
  20. Lockman

    Lockman OK.....Now I Get It . 2024 Sponsor 2023 Sponsor 2022 Sponsor

    The piece of ReBar is a nice touch , also. :lol:
     
    dozerjim likes this.