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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Rear Caliper Banjo Bolt Leaking

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    8/12/2023 4:42 PM  #1

    KeithP
    I FYI 24-7

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    From: Scottsdale, AZ
    Registered: 6/10/2013
    Posts: 377

    Rear Caliper Banjo Bolt Leaking

    I recently installed new rear calipers from Power Stop. For life of me I could not get the copper washers to seal properly without leaking. I heated them up, I tightened them up extremely tight, I flipped the washers over, I replaced the washers.... No Luck! Then I bought these washers. These washers fixed my leaking banjo bolts. Bought these off of Amazon.


    1966, vert, 347 stroker, T5z, 4 wheel disc, pb, 3.70 LS 9", EPAS
     

    8/12/2023 6:14 PM  #2

    50vert
    Senior 24-7 FYI Addict

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    From: QLD Australia
    Registered: 4/01/2013
    Posts: 1,419

    Re: Rear Caliper Banjo Bolt Leaking

    I had the same problem with 2003 front calipers, the banjo was bottoming out on the body of the caliper before it tightened on the crush washer. It needed thicker crush washers.

    "Those telephone poles were like a picket fence"
     

    8/12/2023 7:35 PM  #3

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,216

    Re: Rear Caliper Banjo Bolt Leaking

    Real solution is to grind off the end of the bolt a little bit.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    8/12/2023 10:22 PM  #4

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,325

    Re: Rear Caliper Banjo Bolt Leaking

    Are these washers designed for high pressure and brake fluid?

    I might use these for power steering, not sure I would use for brake system.

     

    8/13/2023 7:16 AM  #5

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,463

    Re: Rear Caliper Banjo Bolt Leaking

    Those washers are copper for a reason.  If the rubber fails or deteriorates you lose brakes.  I would do as suggested, remove the bolt, take 1/16th of an inch off of it, and reinstall it with new copper washers. 

     

    8/13/2023 9:56 AM  #6

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,622

    Re: Rear Caliper Banjo Bolt Leaking

    I agree with the other posts; I’m not sure those rubber washers are for high-pressure, and trimming the bolts may work.
     You may want to contact:
    https://www.purechoicemotorsports.com/index.cfm

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    8/13/2023 4:58 PM  #7

    KeithP
    I FYI 24-7

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    From: Scottsdale, AZ
    Registered: 6/10/2013
    Posts: 377

    Re: Rear Caliper Banjo Bolt Leaking

    They are a Dowty seal. States they can be used for high pressure hydraulic lines. They are a metal washer with a slight rubber lip on the inner diameter. Not sure if they are compatible with brake fluid though. If the rubber failed, I think they would just start leaking a little again. I saw some speed shops online selling them for the banjo bolts. I may try making the bolts shorter with new copper washers to see if that works.

    1966, vert, 347 stroker, T5z, 4 wheel disc, pb, 3.70 LS 9", EPAS
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  •  »  Rear Caliper Banjo Bolt Leaking

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