Leaking diesel fuel

[TenMore]

just changed fuel filter cause o ring was bad and leaking. but with new filter Im still leaking fuel any ideas 2000 f250 7.3 psd???

[gygers]

Is it leaking from the filter cap or the separator drain valve?

[Tony V]

I just changed my damnd separator valve today... sucked! it drips a tad bit every once ina while for some odd reason!

[shu873]

Originally Posted by TenMore

just changed fuel filter cause o ring was bad and leaking. but with new filter Im still leaking fuel any ideas 2000 f250 7.3 psd???

You changed the fuel filter, but what was leaking? The o-ring on the filter cap or the o-rings on the drain valve on the back side of the filter housing? My bet is its the rings on the drain valve. Very common.

[Tony V]

yea get you a set off ebay... Dont go to a dealer... they will sell you the whole part for 60 bucks.....

[gygers]

There is a thread on here that had the sizes of the valve o-rings I believe they are viton. From what I have read and expirienced ULSD is the culprit cuz it eats the orings.

[Tony V]

Yes I agree with you!

[gygers]

Here's a link to Guzzle Welcome to guzzle's PSD Fuel Filter Drain Valve Repair Web Page

[TenMore]

Originally Posted by gygers

Is it leaking from the filter cap or the separator drain valve?

its not leaking from around the cap like it has in the past. No fuel on the filter housing or in the valley ontop the motor
it is all over the the undercarrage took it to the car wash to clean it good maybe now i will be able to see where it is coming from if its not the seperator what than???

[shu873]

Originally Posted by TenMore

its not leaking from around the cap like it has in the past. No fuel on the filter housing or in the valley ontop the motor
it is all over the the undercarrage took it to the car wash to clean it good maybe now i will be able to see where it is coming from if its not the seperator what than???

I'll bet you a case of beer its leaking from the drain valve. There is a little petcok on the back of the filter housing, held on with 4 screws. Remove it and on the inside of the valve you will see 2 small o-rings, these are your problem and need to be replaced. The reason you have fuel on the underside of your truck and not in the valley is because the line attached to the drain goes down the front passenger side of the motor and dumps to the ground there.