Fuel Leak

[teamheeler87]

I've had a fuel leak in my truck for a while and took it in and had the filter drain valve replaced. I paid a lot of money for it to still leak. Lesson learned, don't go to third hand mechanics. But I did take it apart and reinstalled the hole thing but...still leaks? Where do I go from here?

[STurbo90]

are you sure its from the drain valve?

the sticky at the top has some info,

Fix your fuel leak from filter drain valve

but did you inspect the bowl for pinholes when you took it apart? its not uncommon for it to leak.

[pigdog]

First clean and dry the dreaded "valley of death." Make sure that it is really dry. And really clean. Try some brake cleaner, lots of paper towels and a long screwdriver to get everything out of there.

Some have used a sprinkling of baby powder for this next step, but I have not. Go run your truck for a while and look to see where/if you have fuel in the valley between the cylinder banks. If you have fuel at the rear of the valley, it is probably coming from the fuel lift pump or banjo bolt. Try to tighten your banjo bolt, 1 1/8" or 1 1/4" I think. It's difficult to get a wrench in there but it can be done. Then get an inspection mirror and good light and look under the lift pump while the engine is running. There is a weep hole under there that it will leak from if it is bad.

If you have fuel in the front of the valley, it is coming somewhere from the fuel filter assembly. Make sure that the connections are tight, that the bottom of the fuel filter cannister hasn't corroded away, and that the Fuel pressure regulator (big nut with a wire coming from it on the driver's side of the filter) isn't leaking. If the truck is running, it will pulse out of there.

Hope this helps you track it down.