If the hex on the drain bolt is stripped replace the bolt. get a correct 6 point wrench to loosen the bolt. 12 point sickets are nice and all but can strip bolts rather easily if they are a crappy brand
06 GMC Sierra 2500HD Dmax/ally
06 Pontiac G6 GT
05 CRF250R
FOR SALE 06 KX65 with riding gear $2700 obo
