The line that comes out of the fuel filter reservoir has a small drip after I turn off the truck. It is the line that if you turn the yellow valve/switch it will dump the fuel from the filter. Its that line and I have flipped the switch back and forth several times dumping the diesal in the reservoir but after im done driving is still slowly drips. Any of you guys have any ideas??

 

Here yaa go Riffraff Diesel: Fuel Drain O-rings I never did it but I have Guzzles mechanic kit if I ever have a problem.

 

What is a guzzles mechanic kit?

 

its an Oring kit most likely

 

Here is a link for instructions...

http://www.dieselorings.com/docs/FuelDrain.pdf

 

I just replaced the drain valve seals this weekend. It's really easy and the instructions from Guzzle's site are excellent. I regret, though, that I didn't buy all the seals for the filter housing. I may find that I have more than one leak when I get it all back together and drive it. I would also recommend, if your truck has a lot of miles, Guzzle's o-rings for the crankcase vent housing. I discovered that mine are bad. Wish I had bought those at the same time. - Brian