How to fix a slow leak in a car tire?

[cobb]

Careful, over inflating the tire could case the bead to leave the rim, and lots of damage. Before I was hired at the chrysler dealer in 92 they had a guy do that to set a bead on a tire on their old tire machine. It poped off both sides. THe machine was destroyed, the wheel and tire left teh machine despite being screwed down and went up and damaged the celling. THe guy had a broken arm, but was lucky to be alive.

Best bet is to follow what your door panel says, not the tire or some guy.

 

[UncleFester]

Another thing to consider is the seal between the valve stem and the rim. I have heard of them not leaking at a standstill, but when driven, the cetrifigul force bends the stem a little and it leaks. See if bending it around causes the soapy water test to bubble.