I have a 2017 ford f250, went to change the fuel filters upper changed no problem. the lower one which is a water separator, keep draining fuel, never stopped. I have about 2 gallons of diesel fuel. Videos don't show this problem

 

 

There's another thread from within the past week that discusses this same problem. A couple work arounds are in that thread.

 

 

Scratching my head on that one also. Maybe that refers to something prior to 2017?

 

That would be 3 turns on the main fuel filter housing cap to engage a check valve. Then open the drain, close when it stops draining, remove the housing cap and replace the filter.

 

The OP has a 2017 truck with the new rectangular shaped fuel filter so there's no round fuel filter housing anymore to unscrew to activate the fuel shut off valve.

 

So with a pre '17 we unscrew the housing three turns before opening the drain valve? Hmm.. Didn't know that.

 

Pre 2017, correct otherwise the DFCM will siphon the tank.

I have no idea on a 2017+. I haven't seen one of the square filters in person yet.

 

I've had my '14 Lariat for a little more than a month now. I changed all the filters when I got it home. I was wondering if it was normal for the fuel to drain for as long as it did. Thanks guys for the info.

 

Unsrewing the filter housing 3 turns allows to break the vacuum and consequential fuel draw from tank, generated during drain.