22 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWhy does my tire lose air?
Leading reported evidence
Replace wheel
Performed · outcome unconfirmed
No successful repair reported for this finding.
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1
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Leading evidence: 'Replace wheel' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check valve stem' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Check the valve stem, had that happen on my last car drove me nuts and even dealer could not figure out.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
check your wheel for hairline cracks...could be the cause as well.
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22 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T020439Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My car can sit for a week in my garage, & the air pressure remains the same, but if I drive it the ~18 miles to work, & then check it before I leave, it will be down between 5-8 psi, this has happened more than once.
Anybody have any ideas?
Cam
I second that :/
Check the valve stem, had that happen on my last car drove me nuts and even dealer could not figure out. Finally turned out was a valve stem as tire rotated or heated up would leak but just sitting there in right position did not.
Could also be a puncture with an exposed nail or screw head...when you roll over it, a little air escapes.
I diagnosed just such an intermittent slow leak in my 'Vette with a trip to the drag strip. The first burnout and resulting display of sparks made it clear that the issue was something stuck through the tread.
Yes, check the valve stem. I had a very similar "slow" leak. Took it to the local tire shop, removed the wheel and sunk it in the water bath. Tiny tiny bubbles could be seen leaking from the valve stem where the rubber meets the metal thread (that retains the cap).
May also be a slightly corroded inner rim where the Tire bead sits, it may need cleaning up and a re-fit of the tire if you don't find a foreign object in the tire.
Bring it to a tire shop and have them fix it. You've got a leak somewhere. You're in TX but around here (in CT) some of the shops do it for free. Don't chase air. Just have someone fix it.
-Eric
+1 on the crack especially if you have 18"s. Every time the tire rotates the crack flexs and opens a bit so air escapes. That's a lot of loss for 18 miles. A valve stem would leakall th etime, not just when rotating. Replaced a wheel with a crack, same symptoms.
So, out of curiosity, did you determine the culprit? Seems like there's a reasonable consensus of members who thought it might be a crack in the wheel. Did you have a chance to check?
-Eric
Update:
OK, while airing the tire up I noticed that the vale stem was loose, I could VERY easily turn it by hand.
I tightened it up & viola, no more air loss.
I suppose centrifugal force caused it to allow air to leak out, only thing I can come up with.
Thanks for all the replies!
