[Rwillia4]

I'm guessing the leak is not from that surface ding but from the wheel valve. This is a typical area that small leaks occur. To find a leak over inflate your tire (going up to 60 is not a big deal...when the bead is seated during tire installation the presure is usually over 100 ). Put some dish soap in with water (nothing fancy just a couple of soap squirts in a cup), put the soapy water around the valve (or where you think the leak is) then look for air bubbles.