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Very slow puncture?

Posted: Fri Jan 11, 2019 11:02 am
by LondonFalcon
Hi all, would love to pick you brains on something.

My right rear tyre had a small loss of pressure just before Christmas (down from 34 to 31 PSI). When I checked, the other tyres had dropped by 1 PSI at most. I topped all 4 back up to 34 PSI, the warning light went out and thought nothing more of it.

This week the same right rear tyre triggered another warning, with a PSI showing at 31 again. The tyre gauge at the garage confirmed this reading. I've topped it up again.

Is it possible for a tyre to have a very slow puncture that takes 3 weeks to lose 10% of the PSI?

If yes, am I best to get it checked at my local tyre shop?

Re: Very slow puncture?

Posted: Fri Jan 11, 2019 11:28 am
by mik
Yes, and yes.

We had something similar with a screw in the tread of one of the front tyres. If the same - its likely to get worse over time.

Re: Very slow puncture?

Posted: Fri Jan 11, 2019 11:49 am
by LondonFalcon
Ok, thanks. Will get it checked out. Love this forum!

Re: Very slow puncture?

Posted: Fri Jan 11, 2019 3:51 pm
by RoyF
As Mik says, most probably a nail or screw in the tyre, drive the car forward very very slowly and you'll probably see it (much easier with two people of course), unless the head has now worn off.

Very outside chance it could be the valve, take the dust cap off and a bit of spit on a finger will show if its leaking there or not..... If you can go to the tyre shop with an idea of what it is always helps. Just makes any less than honest place think twice before they try and insist on a new tyre that may well not be needed.....

Re: Very slow puncture?

Posted: Sat Jan 12, 2019 7:30 am
by Smitten
I had a screw through the tread but had rapid deflation. Might be an idea to pop the spare on if you have one and you will probably see the problem straightaway.

Re: Very slow puncture?

Posted: Sat Jan 12, 2019 10:06 am
by Neilfx
I have a BMW with a slow release of air in one tyre. It is not a puncture, per se, but the wheel rim has been slightly distorted by a pothole, causing the loss of air. My local tyre centre tested the tyre for a puncture, found none, then ‘persuaded’ the wheel rim back into shape. It improved the issue, but has not resolved it completely. About every 3 weeks I have to top up the air in the tyre. I know I should take it to a wheels specialist, but haven’t bothered yet. You should be able to easily tell if the rim has been damaged at all by a pothole.