Leaking Tyres

[Audiman]

I've got problem with all my tyres. I fill them up to 45psi, but after about 2 days they all deflate down to about 38psi.

The front two tyres were the worst going down to 24psi and 30psi

I've been to the tyre fitters twice and they couldn't find anything wrong. On the third trip I insisted that the tyre\valve be left in the bath for a longer period.

 

FOUND the odd bubbles coming from the rubber seal on the metal valves. I bought 2 new valves from Fraud thinking it would fix the problem.

No such luck now a bit better still going down to 32psi from 45psi.

 

I have Dunlops fitted - does everyone's pressure go down ? (I have a 2003 Zetec with alloy wheels).

[bj2004]

think its been mentioned on here befor seems you are better off with rubber valves as the seal on the others is a known fault

[sparky Paul]

I have Dunlops fitted - does everyone's pressure go down ? (I have a 2003 Zetec with alloy wheels).

No, that's not normal. Mine lose one or two psi over a period of several weeks, and I haven't noticed any difference with different tyres, including Dunlops.

 

Could be porous rims, or it could be the condition of the rims where the tyre seals, but from your mention of bubbles from the valve area even with new valves, it could be de-laquering and/or corrosion in the wheel's valve seat. I would suggest getting the tyre fitter to remove the valves (the complete stem) from the wheels, give the seat a dose of Rimseal and fit hard rubber ones, see if that cures it.

 

The rubber ones might just do the trick, but this problem is likely to recur if it is due to corrosion, and probably get worse, unfortunately.

Edited September 23, 2008 by sparky Paul