Brake Nipple Seized.

Discussion in 'Tech/Mech General' started by sammypvt, May 18, 2015.

  1. sammypvt

    sammypvt

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    My old girl went in for a service today (1986) fiat ducato) the mechanic said the brake nipples are seized and virtually non existent. What can we do as he hasn't got a scrap yard on speed dial.
     
  2. Wildman

    Wildman Read Only Funster

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    build a plasticine cup around them and fill with vinegar leave for 48 hours before attempting to remove. Standard nipples available anywhere.
     
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  3. berni109

    berni109 Funster

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    Time for a brake overhaul?
    replacement wheel cylinders - just need a part number
    drill out the old nipples and retap the threads - easy to get new nipples
     
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  4. rupert

    rupert Funster

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    if were talking bleed nipples they are as hard as the devils nutting bag (not easy to drill)
     
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  5. Tootles

    Tootles Funster

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    And the solution I have used before today.........Undo the brake hose half a turn, and bleed through that, locking back up after every pump. (y)
     
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  6. ivorantony

    ivorantony Funster

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    The nipples have a taper seat and drilling out will destroy them,
    Nipples are not standard! There are many types / diameter/taper/thread,
    The easiest way is a small needle flame to keep the heat localised to the nipple and gently ease it loose, warning! Brake fluid is flammable so any leakage as the nipple undoes May ignite but a wet rag will sort it out,
    Now after saying that! I wouldn't bother, if the corrosion is extensive I would replace the cylinders/ calliper, in the great scheme of things fitting new brake components is the safest thing to do, also bare in mind the brake fluid is probably well past it sell by date so should be completely replaced with DOT4 or DOT5.1 at the same time,
     
  7. Portland

    Portland Funster

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    This was my first thought. But at this age the pistons will be corroded so to be safe replace the Calipers. A good motor factors will soon get them I would also look at the flexible pipes.
     
  8. Jonkil

    Jonkil Funster

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    Remove them frequently with a spark eroder.
    Specialist kit so may not be easily found.
    As someone has already stated..... new calipers may be the way to go.
     
  9. sammypvt

    sammypvt

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    Ive just been up to have a look and there is nothing left of the nipple. 2 x new calipers on order at £65 each. Worth it though when its my life.
     
  10. MikeD

    MikeD Funster

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    That would work for me as well. I have a few cars in the family that have seized brake nipples. (y)
     
  11. iceni

    iceni Read Only Funster

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    heat usually does it for me and one of those lock on spanners that get tighter the harder you turn.
     
  12. tonyidle

    tonyidle Funster

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    If there's enough nipple to do it: put a flat ring spanner on, hit the nipple with a heavy hammer until it deforms & grips the spanner, then undo. It rarely fails. Another option is a LH drill. Most nipples aren't hardened (and the thread isn't tapered on any I've seen - there's a tapered seat at the end though).
     
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