well,it was about time to drain the water from fuel filter yesteday. Opended hood, lifted drain lever, no water (thats good) push lever down, close hood, start engine. went in house while truck was warming up for about 5 min. Came out strong smell of diesel. looked under truck and fuel was pouring down driveway. the drain valve had stuck open! a couple of shots of wd-40 and it closed. most of the fuel went down the expansion crack in the drive. Well a least i won't have any weeds growing there this summer.