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The Official "What The Heck Is This?" Thread

Discussion in 'Early CJ5 and CJ6 Tech' started by Focker, Feb 19, 2016.

  1. Dec 1, 2021
    boopiejones

    boopiejones I can’t drive 55

    California east bay
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    The manifold on my 198 has this tube coming out of it. PO crimped it closed so it wouldn’t leak exhaust gasses.
     
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  2. Dec 1, 2021
    Cj5dale

    Cj5dale Member

    East Tn
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    here’s the only pic that even seems like it would be remotely related. Not sure if this is the tube from the manifold or not…

    upload_2021-12-1_21-20-48.jpeg
     
  3. Dec 1, 2021
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    Yep, its a heat tube for the thermo choke assembly. The tube does not pass exhaust gases but rather it is isolated from the manifold exhaust gases and air is drawn thru it into the choke assembly by a tiny port that passes into the carburetor. When the air warms from passing through the tube imbedded in the cast iron manifold it then travels through the connecting tubing and then passes into the choke assembly on its way into the carburetor. The warm air expands the bimetallic coil that is attached to the choke flap shaft thus removing choke as the engine warms up.
    The tube imbedded in the cast iron manifold is a tiny heat exchanger. The tube should not leak exhaust gases unless it has rotted through.
     
    Last edited: Dec 1, 2021
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  4. Dec 1, 2021
    dnb5853

    dnb5853 Member 2021 Sponsor

    Grand Mesa, CO
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    Thanks - these replies are helpful.
    I just wonder what kind of plug mine had since it has a manual choke.
    At least I know where to go for hot air if I ever need to install my new replacement carb with the thermal choke option.
     
  5. Dec 2, 2021
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    If the stock setup is not used there is no need to plug the tube in the manifold. There would be no I'll effect from not plugging it unless it was rotted through.
    The tiny hole in the bi- metallic choke housing that passes into the carburetor is so small it is not necessary to do anything with it. A typical manual choke conversion retains the original bi- metallic choke housing body and just replaces the cover and connection to the choke flap shaft after the bi- metallic spring is removed.
     
  6. Dec 2, 2021
    timgr

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

    Medford Mass USA
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    Yes, it's hot air sourced from around the exhaust manifold, not exhaust gas. No connection to exhaust gas. There is metered vacuum from the carburetor that draws the hot air into the choke cover from the tube. Dorman has replacement choke stove kits with or without the stove mounted on the exhaust manifold. https://www.dormanproducts.com/p-18000-55111.aspx?origin=keyword

    I would plug the metered vacuum if there's no connection to hot air, simply because it's passing unfiltered air into the choke cover. The amount of air won't be a problem, only that it's not filtered.

    Some engines (AMC V8s for example) draw filtered air from the air horn of the carburetor and heat that in the choke stove. The Dorman choke stove linked above used to come with a small wad of glass wool to filter the air from the choke stove - same idea.
     
    Last edited: Dec 2, 2021
  7. Dec 2, 2021
    Fireball

    Fireball Well-Known Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Pullman, WA
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    Here's a promo picture showing the auto choke tube. Based on the air cleaner and GM alternator I'm guessing it's a Buick photo:
    [​IMG]

    I'm not sure Jeep ever put an auto choke on a CJ V6 from the factory. Maybe it was an option? Maybe in Commandos?
     
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  8. Dec 2, 2021
    Lockman

    Lockman OK.....Now I Get It . 2022 Sponsor 2021 Sponsor 2020 Sponsor

    White City, NY 14617
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    I always thought that it was a GM thing, Myself ?
    [​IMG]
     
  9. Dec 6, 2021
    WarFlea83

    WarFlea83 New Member

    Indianapolis, IN
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    I need some help identifying these brake drums. They are 11 in drums on the front wheels of a 1967 CJ5. I plan to move these to the rear axle and I need new shoes and would like to replace the cylinders too. However, I don’t think these came off of a jeep and can’t seem to figure out what they’re from to order parts. Any help would be appreciated!
     

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  10. Dec 6, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
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    Maybe from a jeep pickup of the era?
     
  11. Dec 6, 2021
    timgr

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

    Medford Mass USA
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    Jeep pickup (J-truck) and Wagoneer got the Bendix 11" Bendix brakes from the start, AFAIK. They changed to Delco 11" drums in 1974, or optional disk brakes, also Delco. The early Wagoneer with Bendix has cable self-adjusters. These are not Bendix brakes, or Delco. Maybe they are Lockheed (?) brakes from a Utility truck or wagon? These are also 11"x2", not self-adjusting AFAIK.

    First step is to measure the linings diameter and width.

    This should be a new thread.
     
    Last edited: Dec 6, 2021
  12. Dec 6, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Maybe the J-trucks. Pretty sure my early pickups had manual eccentric adjusters.
     
  13. Dec 6, 2021
    timgr

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

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  14. Dec 6, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Not talking about J-trucks, I mean 1950's vintage. I'm referring to the the same type shown in the OP's photo.

    My very basic book lists eccentrics on 11x2 brakes in the early pickups, which matches my memory. I'd go check but my trucks are on a different property and it is dark and raining...
     
  15. Dec 6, 2021
    timgr

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

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    Pete, you are not making sense. I pointed to the parts book, and it does not show eccentric adjusted brakes. It includes J-trucks from their origin in 1962. I understand this does not match your memory. Possible the earliest J-trucks had the same eccentric brakes as the Utility trucks. Possible. Aside from identifying the brakes of the OP.
     
  16. Dec 6, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Sorry for the confusion. I think the brakes he shows are PRE-62 truck. That era ('47-'62) may be the years for parts he needs.
     
  17. Dec 6, 2021
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
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    Look like the Lockheed units as used on '53 / '65 trucks/waggies to me. Try Walck's for parts.
     
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  18. Dec 6, 2021
    WarFlea83

    WarFlea83 New Member

    Indianapolis, IN
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    I think you guys hit the nail on the head. These do look like they could be from the earlier trucks. Thanks for the tip on Walcks, their 11 in shoe set for the pick up trucks look right. I might give them a call to confirm. Those shoes aren’t cheap at $55 per set!
     
  19. Dec 6, 2021
    boopiejones

    boopiejones I can’t drive 55

    California east bay
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    Assuming a 1960 Jeep truck, which looks correct, rock auto has shoes for $22 for one full axle (set of four). and wheel cylinders as low as $14.
     
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  20. Dec 7, 2021
    WarFlea83

    WarFlea83 New Member

    Indianapolis, IN
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    This forum is the gift that keeps on giving! Thanks boopiejones, just placed my order with rock auto and saved a ton. I’ll be able to cross the rear axle off my list soon!
     
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