Tyre loosing pressure puzzle

Discussion in 'Tech/Mech General' started by scotjimland, Jun 23, 2009.

  1. scotjimland

    scotjimland Funster Life Member

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    One of the tyres on my Seicento looses pressure, about 10psi over the coarse of a few days .. it's on an alloy wheel.

    I've had it checked at a tyre fitters and it hasn't got a puncture, no leak at the valve or the rim .. I've also had it in a bath of water and can't detect a leak .. all I can think of is a porous wheel, anyone heard of this and is there a solution ?

    tia

    Jim
     
  2. Dodgey

    Dodgey Funster

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    If not a conventional puncture or valve issue I'd say it's still most likely the rim even if you can't see it it could be a simple as the weight of the car/deformation of the fitted tyre causes leak and no load etc it 'seals' up????

    To prove simplest is flip the tyre off and inspect & clean bead mating area and try again?

    Also, if you have the tyre off inspect the bead, once had a tyre place break the bead reinforcing, without realising (aledgidly) and that was interesting, seemed fine then suddenly no presure, pumped up fine but as soon as driven it would go down quickly.
     
  3. Terry

    Terry Funster

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    Hi Jim you are probably thinking right :thumb: It happened on one of my wheels yrs ago :Sad: You can remove the trye and I was told to spray a varnish/lacquer on the inner rim, but I chose the easy option of fitting a tube :thumb::Rofl1:. Then again in this day will they fit a tube to a tubeless tyre ?????? It is not as though you are going for a speed record :Rofl1::Rofl1: so you may find a friendly tyre fitter who will fit one for you :thumb:
    terry
     
    Last edited: Jun 23, 2009
  4. Road Runner

    Road Runner Read Only Funster

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    Going to end up as new tyre
     
  5. Sundowners

    Sundowners Funster Life Member

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    it does sound like the rim:cry:
    I would try Finilec??? or a similar product, IMHO it's worth a try.
    Nigel
     
  6. Terry

    Terry Funster

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    Hi again Jim I just thought of the same solution as Sundowner :Rofl1::Rofl1: but he beat me to it :Rofl1::Rofl1:
    terry
     
  7. scotjimland

    scotjimland Funster Life Member

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    Thanks guys..

    I think I'll try pumping some of the puncture repair goop into it and see if that works.. :Wink:
     
  8. scotjimland

    scotjimland Funster Life Member

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    you may well be right John .. but it's almost new .. so I'll persevere with the foot pump :Laughing:
     
  9. old-mo

    old-mo Funster Extra Special Life Member

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    Two ways round the porous metal bit..

    Both necessitate taking the tyre off ..:cry:

    1.. Tape up the wheel rim (edge where tyre fit`s) and degrease the rest and get a aerosol of clear laquer and give a few coats..


    2. Fit an inner tube,, probably the easiest solution.. :thumb:
     
  10. old-mo

    old-mo Funster Extra Special Life Member

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    Woop`s,,, Sorry just seen terry`s post.. :Doh::Blush:
     
  11. vwalan

    vwalan Funster

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    hi jim ,,go to a farm supplier n get some green oko works everytime unless you get a real big hole in your tyre.
     
  12. Sundowners

    Sundowners Funster Life Member

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    I am not sure that fitting a tube into a tubeless is the correct thing to do these days, anyway I would not feel confident with one on a motorhome (I know yours is just for a car) It would be better than nothing on the spare though.
     
  13. scotjimland

    scotjimland Funster Life Member

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    Hi Nigel ,
    tend to agree and would otherwise change it to the spare, but it's a skinny space saver metal rim .. will try the lazy option first and squirt some puncture repair goop in ..

    Jim
     
  14. andy rob

    andy rob Read Only Funster

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    I wouldn't spray another thing in the tyre than air, these get you home fix's on a flat tyre, will inflate the tyre ,but they contaiminate the tyre.
    take tyre off rim, turn it around (I guess it not a directional), spin the wheel on the tyre balancer & use some sort of abrisive device to 'ruff' up the edge of the bead (wire brush or maybe somtihng a bit more ) & put loads of the white tyre sealler on when they fit the tyre
    job done :thumb:
     
  15. vwalan

    vwalan Funster

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    it may be get you home but having used it in maroc n got home from there it seems to work. as for damaging the tyre it does make it hard to repair later but if it stays up why repair. you can still fit a tube . tubes can be fitted into tubeless tyres but not advised on very low profile tyres . then its only tyre distributers advice not law.
     
  16. Sundowners

    Sundowners Funster Life Member

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    It does look as though Jim may have to buy a new wheel if he can't make one of these fixes work,:cry::cry: he is pretty sure that the leak is not in the tyre, best of luck Jim.
    Nigel
     
  17. ginge61

    ginge61 Read Only Funster

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    go to a tyre depot make sure the cleen the rim well wire brush then they have a black sealing compound they brush on the rim norm works
     
  18. pappajohn

    pappajohn Funster Life Member

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    :Eek!::Eeek: never, ever fit a tube in a tubeless tyre.....

    the internal surface structure of the tubeless tyre is completely different to the old tubed tyres and the friction between tyre and tube will eventually cause a sudden blowout:Eeek:
     
  19. Terry

    Terry Funster

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    :Eeek::Eeek::Rofl1::thumb: I knew there was a reason in this day and age John :Rofl1: just did not know why :Rofl1: Me if the glupy stuff did not work I would still stick a tube in and make sure it was on the back :Rofl1: especially on a wacky fiat that will only be used around town :thumb::Rofl1::Rofl1:
    terry
     
  20. vwalan

    vwalan Funster

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    hi pappa not all tubeless have the ines on the inside its a matter of look n see. mitchelin have a lovely smooth inside. wonder what brian in wales has to say he runs a tyre shop.you are right some have lines very thick.
     
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