Seems like the alloy wheel is damaged and either not sealing on the rim or a crack somewhere in the alloy. You need to go to a tyre fitter and put the whole wheel/tyre in a bath of water

Edited by mcb100 on 13/02/2021 at 22:14

I've sprayed soapy water to check for a leak round the bead and valve but no indication anything is wrong.

Did you take the wheel off to check the bead on the inner side? It's much easier to detect a tiny bead leak with the wheel flat on level ground. Inflate the tyre to at least 5psi above recommended pressure. Presumably you have inspected and sprayed the whole tyre with detergenty water to exclude puncture. If still no result, clean the inside of the wheel and paint or spray with detergent water to detect any tiny crack(s) in the metal.

Hi,

I have a Kia Ceed 1.6 2014 reg. I had a front tyre (alloy) making a tinny whirring noise and the tyre losing pressure. Eventually this stopped after the brakes were replaced (and after 7 separate visits to Parks Kia who have been a nightmare) but a year later I'm still getting low tyre pressure.

I've had 2 different Parks Kia dealerships check the tyre and both can't find anything wrong. I recently had the problem tyre replaced and the next day the new one was almost flat! I've sprayed soapy water to check for a leak round the bead and valve but no indication anything is wrong. I'm assuming it's a wheel bearing but I'm at my wit's end and Parks Kia have been no help.

Can anyone give advice on this please? I'm literally spinning my wheels!

if they cannot find a leak in the tyre ask them to paint the wheel inside, this seals the alloy so it doesn`t leak (sometimes they get small cracks they cannot see) if the tyre appears ok, very surprised they have not done this anyway as cracked alloys are common