Added a half jug of coolant, attempted to bleed it off and it just kept shooting air through the nipple (hah.. shut up I'm 12). Grabbed a new cap and some more coolant from Advance Auto and mowed the lawn while it cooled. New cap on, another half jug of coolant, started it up and within about 2 minutes only coolant was running out of the nipple. Old cap "looked" good but I guess it was letting it air. Or something. I dunno but she's happy now.