Slow leak in tires, are old wheels to blame?
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This is a discussion on Slow leak in tires, are old wheels to blame? within the Suspension & Wheels forums, part of the Tech & Modifying & General Repairs category; Two of my 4 tires have a slow leak. Had my tire guy look at them and he couldn't find ...

  1. #1
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    Slow leak in tires, are old wheels to blame?

    Two of my 4 tires have a slow leak. Had my tire guy look at them and he couldn't find any holes. I read on the web that aluminum wheels develop a porousness over time and can bleed air very slowly. Obviously this is both a safety and convenience concern--if true. Anyone know if Subaru wheels should be replaced? Mine are 10 years old.

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    The Member michaelwfox's Avatar
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    Wheels should be fine. Check the valve stems. Those will wear out a lot faster than the wheel itself.
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    MAINEiac 11blackSTi's Avatar
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    To see where the leak is coming from, inflate the tire all the way and lightly pour a mixture of dishwashing liquid and water onto the valve stem, around its base, and around the inside and outside edge of the wheel where the tire and rim meet. Any escaping air will produce bubbles in the soapy water at the site of the leak.

  5. #4
    Registered User JaySin's Avatar
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    This happened to me on an older car (not a Subaru) I had in the past on 2 wheels. Eventually, bringing it to a tire specialist revealed that the wheel rim and lip of the tire had imperfect contact due to grime and build-up over time. On some wheels it builds up where you can't see it unless you dismount your tire. They dismounted my tires...cleaned the edge of the wheels and tires...then put some silicone based grease stuff along the wheel edge and re-mounted. Problem stopped. I was losing about 4-6 PSI / week. I'm not sure what your rate of loss is.

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