Leaking wheel rim

[pakuma]

I have a 2013 Cougar 5th wheel, it has the aluminum rims.
One tire keeps slowly losing air. It is very slow and does not show up in a bubble test. I know it is the rim because I have changed tires on that rim and it still does it. I cleaned the bead seat each time.
It will usually lose 1-2 psi a week, while the other three maintain their pressure.
Any ideas on how to seal the rim?
Thanks,
:banghead::banghead:

[Wingerdinger]

I have a friend that is in the tire business. He would remove the tire from the rim and inspect the rim inner edge for cracks and pits. Inspect the tire bead as well. He then buffs any defect or corrosion out. Then apply a tire sealant on the tire bead, some stuff specified for the purpose, and reinstall the tire.
Some rims can't be fixed, most can.
Make sure you get your valve stem replaced each time the tire is off the rim.. cheap insurance.
I've heard of tire pressure monitors that leak as well.

[ChuckS]

Hope you also replaced valve stem with new and checked valve stem core to make sure it’s tight

[Hblick48]

I owned a wheel repair shop. Wheel could be bent, cracked, or have a "casting issue" whereby air can escape via minuscule flaws in the casting. All of which are usually repairable. Google wheel repair near me.

Last year I upgraded from E rated tires to F, so inflation pressure went to 95psi. On a trip home, at a rest stop I noticed the right front tire was very low on air. Changed out to the spare. Upon getting home, checked out leak. Found that alloy wheels had a maximum pressure rating of 75 psi. There actually was a flaw in casting that caused air to leak from the inside Barrel. Fixed it and replaced alloy wheels with steel, can withstand the higher pressure no problem. Didn't leak at the lower pressure with E rated tires.