Fuel Leak infront of the engine

[Turbolag87]

hey guys i started my Truck today (E350) and its dripping Fuel infront of the motor by the crank Pully. Im new to diesels, is this a common problem on them? what could cause this leak?


Thanks guys

[guzzle]

If it is on the driver's side, it could be where the fuel return or fuel feed connects to the fuel lines that run down the chassis frame. There is also a fitting that connects to the fuel rail on the front of the driver's side head. The last source that I can think of are the fuel rail plugs on the front of each cylinder head. You will most likely have to get things cleaned up to pinpoint the actual source.

Most common fuel leaks will be caught in the valley and run down the rear of the engine.

[Turbolag87]

very odd as it only seems to leak in COLD morning and then stops when the truck heats up. The leak is on the passenger side of the k member.

[kwiederhold]

possibly the two fuel lines that run behind accesories in front of engine, they tend to rot out there

[Turbolag87]

how come it only leaks when cold? I mean REALLy cold

[guzzle]

Mostly due to metal contraction. Older o-rings will get what is called "compression set" which is basically where the o-rings deforms to the metal that they are pressed against. Metal shrinks when it gets cold and allows fuel / oil to seep by the o-ring.