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Thread: Porous Wheels

  1. #1
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    Porous Wheels

    One of our cars, a Subaru Imprezza has a porus alloy wheel (WRX alloys) and leaks air and has done for years - currently needs to topped up with air twice a week. Note this is not a crack in the wheel and the leak is in the inner part of the wheel not the outer rim section.

    The car has to go in for new tyres this week and ideally also have this leak sealed from the inside - the obvious fixes are painting the porus part, silicon sealant, gaffa tape etc but to tyre places have a standard fix for this? The wheel is not going to be replaced so not an option.

    Thanks

    Garry
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  2. #2
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    Any suggestions?
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    it leaks from just one spot? 20 cent piece size area?
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    I'd paint the inside of the wheel with epoxy primer. Any body shop should be able to do this when you get the tyres off. Or you could use that tyre foam in a can stuff before you change the tyres and see if it works.
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  5. #5
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    I have used polyurethane (Sikaflex) to seal series steel rims around the centre before fitting tubeless tyres - works well. A smear of that over the porous areas or even the whole rim inside should last forever. It's pretty much impossible to get off anything once it cures.
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    Get another rim from a wrecker.
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    Quote Originally Posted by loanrangie View Post
    Get another rim from a wrecker.
    Quote Originally Posted by Pedro_The_Swift View Post
    it leaks from just one spot? 20 cent piece size area?
    Yes - wheel repairer expert advice - buy a new wheel - platinum WRX STI wheels are rare as rocking horse and cost even more.

    I suggested things like painting the inside of the wheel with various products and always got a resounding - wont work from all the so called experts. What stumped then was when I asked about putting on a rubber sealing band that are used to seal wire wheels around the spokes when tubeless tyres are used.

    New tyres are on with just bead sealer painted on the porus area and if the leak continues then a rubber band glued in is going in.

    Thanks

    Garry
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    Quote Originally Posted by 101RRS View Post
    Yes - wheel repairer expert advice - buy a new wheel - platinum WRX STI wheels are rare as rocking horse and cost even more.

    I suggested things like painting the inside of the wheel with various products and always got a resounding - wont work from all the so called experts. What stumped then was when I asked about putting on a rubber sealing band that are used to seal wire wheels around the spokes when tubeless tyres are used.

    New tyres are on with just bead sealer painted on the porus area and if the leak continues then a rubber band glued in is going in.

    Thanks

    Garry
    Did any of them offer a reason why it wouldn't? I would have thought something like that would have worked fine - and pretty easy to try as well. Hope the repair works - keep us posted.
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    They just said that it would only last a few weeks and the heating and cooling of the wheel would lift the coating - my thought is BS but at least the wheel repair specialist said that welding porus aluminium is not successful so he wasn't trying to get extra work.

    I really have no idea on how to deal with this, hence the post but I agree that a heavy sticky coating of some type should work - even plain paint.

    Anyway the guy who put the tyres on said he thought bead seal which is a black bituminous paint might work so we will see.

    Cheers

    Garry

    Oh - in a blind test - the owner has to work out by testing tyre pressures over the new few weeks where the wheel that was originally on the front drivers side is now located - if there is no change in pressures he will not be able to work out where the wheel is and will confirm it is fixed.

    Also we think our Disco/RRS lower control arms are crap - this Subaru has only covered 180,000km and its suspension rubbers have all failed - certainly worse than my RRS at 190,000km on the original LCAs. No suspension rubbers in the Suby riding on 45 aspect ratio tyres is no fun at all.
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    any rubberised paint or epoxy will work, even the underbody deadener works.


    be careful on the application if the rim has had plenty of soaps or similar applied during tyre installation some of it may be lurking in the perosity and prevent adhesion.

    smart cookies use enamal paint thats the same colour as the metallic finish of the rim then lightly sand it when its dried.
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