Tyres losing pressure regularly

[Turn7]

The two rears on my Celica are constantly losing air. I must have to add air once a week minimum.

Tyres are in good shape,4mm tread and no obvious damage.

Thinking about either getting a tyre place to take them off and clean the rims and fit new valves OR adding something like that Slime stuff ....

What do we think?

[Riknos]

Standard Celica wheels? They are of a poor quality from what I can remember, have they become porous perhaps? Tyre place can test for leaks so that would be my first place to go.

[Munter]

You could make up some soapy water, and apply it around the rim and tyre. If it starts to blow bubbles it could well be wheel refurb time.

I had similar on a set of MX5 wheels. 1 started to regularly need a top up, then a 2nd, then a 3rd all in about 6 months. A quick acid dipping and powder coating (by experts not me), and the problem went away.

[Turn7]

I did wonder about porosity.

Good shout about trying the foam idea....

[mr_fibuli]

A tyre place should be able to find the leak - mine was due to corroded inner rims, which they sanded smooth and gave a quick lick of paint for the price of a puncture repair. Probably a bit of a bodge though, a full refurb would be better.

[sparkyhx]

valves
poor seal on corroded rim edged
porous/cracked alloy

Take to tyre place they will tell you

[Foobar2]

Turn7 said:

Tyres are in good shape,4mm tread and no obvious damage.

Had the same symptoms. When the tyre centre removed the tyre, they found that the inside edge of the rim had corroded and was letting air escape between the rim and the tyre. They cleaned it up, added some sealant and then inflated it using actual compressed nitrogen telling me that that would help prevent the corrosion from happening again.

[thatdude]

My motorcycle has suffere from corrosion; my mechanic slapped on a load of bead-sealer, which has done the job, but they will need a refurbish.

[Turn7]

Going to take it to Wheels in motion in Chesham ASAP .

They have a specific bead sealant that's very good apparently.