There are all kinds of stories going around about aluminum rims leaking .I took my driver car to the garage to day with a slow leak ,which happens about every 6 months.
The repair man says these damn aluminum rims so he proceeded to take the tire off & I noticed this white chalk like powder on the tire where it seals at the rim.Yep he says thats where its leaking .
So he gets his air grinder with the abrasive pad on & proceeds to clean up the rim & for good measure cleans the white stuff off the tire with this same tool .Then puts this black crap around the rim & says this will seal her up ,put the tire back on the car & as I`m driving home I said to myself there is something wrong with this picture.
This guy that is cursing the alumium rims is causing the problem .This abrasive air grinder is taking the protective coating off the rim & causing the aluminum to oxidize
thats what that white powder is & over time it will build up between the tire & the rim causing the leak ,Then to top this off he uses the grinder on the tire to get rid of the white chalk there by removing a layer of the soft rubber that was put there to help it seal .
So what is the answer to cure this problem # 1 take that grinder away from the repair man .and every tire repair shop has one .# 2 throw that black guk away & paint the sealing area of the aluminum rim with a epoxy primer .
Comments are welcome !