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Injection Line Flare Socket / Wrench / Tool

Discussion in 'IDI Tech Article' started by lakesurfer, Dec 31, 2019.

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  1. lakesurfer

    lakesurfer Full Access Member

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    Injection Line Flare Socket / Wrench / Tool

    After replacing and dynamically timing my IP, a couple of fuel line nuts at the pump got loose. That sent me looking for an SAE 5/8" (or 16mm) flared wrench or slotted tool to tighten fuel line nuts on the IP with the pump installed on the truck. Maybe I didn't look in the right place but it seemed like the answers were all over the place so I offer this as a consolidated report of all my OCD inspired findings. Please correct and add as needed:

    THE SEARCH FOR A FRUGAL (sub $30) Off The Shelf TOOL:

    Bupkus. Zip. Nada. Save some time. Hours of searching revealed there are a crap-ton of these tools available to service Cummins, MB, BMW, etc, but none of the commonly manufactured no-name tools or sets I found are SAE 5/8" . None of the metric sets even had a 16mm. Apparently our Stanadyne DB2 pumps are the ONLY ones that use a 5/8" fuel line nut. GRRR.

    THE OFFICIAL TOOL:
    OTC made the Ford "Rotunda" tool and continue to sell the same tool under their part number. It used to be $50-60 and now is a ridiculous $138-170!!! As of this writing it is available online from multiple sources.
    Size: SAE 5/8" (6-point)
    Drive: 3/8"
    Overall length: 2.6"
    Part numbers:
    OTC-7460
    OTC7460
    OT7460
    7460
    303-230
    T83T-9396A
    T83T-9396-A

    THE SNAP-ON TOOL:
    Avalable online from Snap-On for $60. I bought one used on eBay for $38 that included shipping.
    Size: SAE 5/8" (6-point)
    Drive: 3/8"
    Overall length: 2-27/32" (almost 3")
    Part number: FRX201

    DIY:
    Many have apparently had good results using a 5/8" deep-well *impact* socket and cutting/grinding away material to create the tool. Research indicates it should be an impact socket to have enough material and rigidity so the flare doesn't flex when torqued. The donor socket probably needs to be at least 2.5" long. Some say cut out on a flat. The OTC and Snap-On tools cut out on a point though so one has to wonder if that was on purpose for strength.

    It is worth noting that at least one fortunate member here has posted a pic of an IDI-specific tool kit they own that includes another variation of the IP fuel line flare socket. I would love to know more about the manufacturer and part number of that entire kit.

    I appreciate this forum and have benefited greatly from your advice. I hope this is helpful to the group.
     
    Jason1377, saburai, TahoeTom and 2 others like this.
  2. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    That doesn't seem like a bad price these days. A pretty decent discount too. Sure, it's mostly a single purpose tool, but not a bad price for a single purpose tool. Especially with the Snap-On name attached.
     
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  3. lakesurfer

    lakesurfer Full Access Member

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    Yep. I figured a decent no-name donor socket would be about $10, leaving $28 to cover the time grinding & cutting. So buying the used Snap-On made sense. Its cut-out is different from the OTC so I just hope it works.
     
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  4. TahoeTom

    TahoeTom Supporting Member Supporting Member

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    The Ford tool kit was Rotunda TKIT 1983 D6.9. At least that is the number on mine. All the tools will work on 7.3 IDI. The flare nut socket in the kit is the same as the OTC one posted above. Unfortunately some folks on ebay are parting out the kits and selling individual tools to maximize profit. I had to source some missing tools when I purchased my kit, but it was mostly complete. DSC00233.JPG
     
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  5. lakesurfer

    lakesurfer Full Access Member

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    @TahoeTom , Thank you. That kit is bad to the bone!
     
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  6. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    That's $28 assuming that I didn't screw the first socket up (which I very well might do). I'll bet that the different cut out on the Snap-On won't make any difference.
     
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  7. lakesurfer

    lakesurfer Full Access Member

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    This ^^^
     
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  8. nelstomlinson

    nelstomlinson Full Access Member

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    I have that Snap On socket, but it's six point. I have a 5/8" 12 point obstruction wrench that I cut a notch out of to make it a line wrench. I figure I'll use the Snap On to break the nuts loose, and the 12 point to finish the job.

    I ground down the 9/16 end of the obstruction wrench to make it fit on the injection pump nuts.
     
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  9. lakesurfer

    lakesurfer Full Access Member

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    @snicklas @Agnem :

    Submitting this thread for your consideration to be added to the tech stickies. Might save someone else some time.
     
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