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Thread: Losing air in tires when it gets cold...

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    Losing air in tires when it gets cold...

    So I understand that the tire pressure should vary based on the outside temperature, but it seems that everytime the weather nosedives, I get a low tire warning. I add air to bring it back to about 35-36PSI and then the next time temps drop again, low tire warning (even if the weather never got "warm").

    I know I am not easy on wheels when I get out on the trail (two beadseats damaged or destroyed in past), but ALL FOUR wheels are losing air when it gets cold and stays cold.

    When I had tires put on a while ago, I did not have the shop "service" the TPMS sensors in any way. two of them do not work anyway. Are there rubber seals that could be shrinking in the cold weather and allowing air to escape?

    I apologize, but I just do not know.

    Thanks.


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    Re: Losing air in tires when it gets cold...

    This just proves that Deflategate was BS! Lol
    Anyway I had the same thing happen to me when I drove my other car up to RI from GA, the tires were brand new installed that week and filled with nitrogen because tire shops down here love to use that, it was Oct so in GA it was 70 got to RI and temps dropped to 28 at night came out all 4 tires were flat, filled them back up with air never had that issue again, ever so I blame the nitrogen.
    I'm not Bill Nye the science guy but it could be the rubber shrinking due to air molecules slowing down which can lower pressure.
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    Re: Losing air in tires when it gets cold...

    The rubber seal on the TPMs do deteriorate after time. I had a slow leak that ended up being the rubber seal on a TPMs. Only way to know is the tire dunk tank
    "I'd rather be lost on Drummond Island than found on the Mainland!"
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    Re: Losing air in tires when it gets cold...

    Nitrogen is supposed to have a larger molecular structure than O2 and run cooler at highway speeds thus giving a more stable pressure. Have seen cold air temps drop tire pressure by 3-5 lbs on the Impala recently but when the tires warm up the pressure goes back up.

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    Re: Losing air in tires when it gets cold...

    I prefer nitrogen over o2. Get new get new seals on TPMS

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    Re: Losing air in tires when it gets cold...

    No nitrogen here. Good old fashioned air only. It is weird though...only leaks down to 24 or 25 PSI and holds air again. Never goes all the way flat.

    I guess I will look for replacement seals or just put new sensors in the wheels. I will have to wait for nicer weather as I will likely do it myself.

    Thanks.


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    Re: Losing air in tires when it gets cold...

    Just read something and according to most tire manufacturers it's normal to loose 1-2 pounds pressure every month no matter the temps or use.

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    Re: Losing air in tires when it gets cold...

    I just had a similar problem where my tires didn't loose much air when the outside temp was above 40*F.
    But, I was needing to air them up almost daily, when it got down under 20*.
    So, I had to take a look into it...
    Turns out; I had a bunch of small rocks and dirt stuck between the tire and the rim.

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    Re: Losing air in tires when it gets cold...

    Hmmm. Those of you that have followed me on the trail a few years ago know this may be an issue, but I have not wheeled hard on these tires...


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    Re: Losing air in tires when it gets cold...

    Have all 4 broken down and wire brush the wheel to tire bead surfaces to clean off any rust, funk or goo.
    My tire guys put an extrathy layer of black goo stuff around every wheel on both my mounting surfaces because they know I air down and wheel.
    "I'd rather be lost on Drummond Island than found on the Mainland!"
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    Re: Losing air in tires when it gets cold...

    I run about 78% nitrogen; no more than that, though!
    We don't stop playing because we grow old...we grow old because we stop playing.

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    Re: Losing air in tires when it gets cold...

    Kinda tough adding nitrogen after airing down when finishing a trail out in the boonies when the pavement starts!

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    Re: Losing air in tires when it gets cold...

    Quote Originally Posted by Hunner View Post
    Kinda tough adding nitrogen after airing down when finishing a trail out in the boonies when the pavement starts!
    Not if you only run 78% Nitrogen!!!
    We don't stop playing because we grow old...we grow old because we stop playing.

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    Re: Losing air in tires when it gets cold...

    Quote Originally Posted by 650Hawk View Post
    I run about 78% nitrogen; no more than that, though!
    , Me to.
    My onboard ARB twin compressor does a great job of pumping 78% nitrogen.

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    Re: Losing air in tires when it gets cold...

    Quote Originally Posted by Brucesans View Post
    I prefer nitrogen over o2. Get new get new seals on TPMS
    price for the new seal? would folks recommend installing a new valve stem as well? (unsure if seals & stems are one and the same)

    I've got the same problem, very slow leak

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    Re: Losing air in tires when it gets cold...

    Quote Originally Posted by jman1975 View Post
    price for the new seal? would folks recommend installing a new valve stem as well? (unsure if seals & stems are one and the same)

    I've got the same problem, very slow leak
    An entire rebuild kit should be less than $20 for all 4 tires. You do know a tire shop will have to break down the wheel and tire to swap out the seals and core. Make sure not is the TPM that is your issue and not a rim leak or something in the tire. A good tire shop will have a leak test tank and be able to tell you what it is.

    tpmsExplodedViewSmall.gif
    "I'd rather be lost on Drummond Island than found on the Mainland!"
    Previously owned: Mr. Black H3 Alpha OffRoad, Mr. Orange 08 H3 Alpha, Mr. Blue 08 H3 Alpha OffRoad, Mr. "T" 09 H3T Adventure 5 speed, XXLH3 10 H3 Alpha OffRoad

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