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Leaky Steel Radiator Pipes Behind the Fan

Discussion in '3rd Gen. Tacomas (2016-2023)' started by ghs57, Jul 12, 2025 at 6:33 AM.

  1. Jul 12, 2025 at 6:33 AM
    #1
    ghs57

    ghs57 [OP] Well-Known Member

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    Chops
    Catskill Mts. NY
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    '17 Grey TRD OR xtracab 3.5L 4WD
    Pretty much stock right now
    Has anyone had a problem with the steel radiator lines in the front (right behind the fan - two pipes running to the left side of the engine). The pipes are leaking right over the serpentine belt, flinging coolant over the front of the engine bay. The parts diagram calls it the Water By-Passenger Pipe #1 (#16268-0P030). These pipes seem to go around and under the engine. I was not able to find any instructions for replacement. I am wondering how big a job this is. Any help would be appreciated.

    In the picture, you can see where the coolant is dripping on the belt. It's leaking under the rusty mount.

    IMG_6102.jpg
     
    Last edited: Jul 12, 2025 at 6:41 AM
  2. Jul 12, 2025 at 7:26 AM
    #2
    CT Yankee

    CT Yankee Well-Known Member

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    Only aesthetic mods so far Leer 180 cap & Clazzio covers on order.
    I would first check the upper radiator hose and the smaller rubber coolant hose connections.
    Perhaps disconnect, clean, examine carefully & reconnect them both before diving into replacing the steel lines below.
    upload_2025-7-12_10-26-28.png
     
    STEELeR43 and 4x4spiegel like this.
  3. Jul 12, 2025 at 10:46 AM
    #3
    ghs57

    ghs57 [OP] Well-Known Member

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    Pretty much stock right now
    Already done that. We hoped it was simply a rubber hose leak. It is unquestionably the steel lines where welded to the rusty bracket. We were able to trace the drip back to the underside of the bracket, and actually see the drip form and travel to the right before dropping.
     
    Last edited: Jul 12, 2025 at 10:54 AM
  4. Jul 12, 2025 at 12:13 PM
    #4
    Willy Lump Lump

    Willy Lump Lump Well-Known Member

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    This and that
    Black pepper in the coolant, wash out the engine bay and put a for sale sign on it.
     
    Phlogiston likes this.
  5. Jul 12, 2025 at 12:19 PM
    #5
    ghs57

    ghs57 [OP] Well-Known Member

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    '17 Grey TRD OR xtracab 3.5L 4WD
    Pretty much stock right now
    Haha. I don't give up that easily.

    An option if replacement is too complicated would be to cut the pipes to the left of the bracket and use a longer hose to connect the pipes to whatever they are attached to. I'm considering it. the cost of some hose and a few clamps will be cheaper in time and money than tearing it all apart.
     

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