F250 7.3 Diesel Oder

I have recently started to smell a diesel oder in the cab of my Ford F250 7.3 diesel. Does anyone know what might be the casue? Don.............

Fresh fuel I'm assuming?

Check your fuel lines they run along the driver's side frame rail.
Also check the lines around the filter housing near the center front of the engine.
Make sure your filter housing cap is secured (also look for cracks in the housing)

There are O-rings on the filter housing that leak. They are attached to the water drain off valve on the back side (I think it's yellow)

Very likely your fuel filter housing is leaking. Look for fuel in the valley on top of your engine.

Could be the o-ring on the fuel filter housing cap. It is easy to put in wrong.

Or it could be the water drain is leaking. The o-rings on the water drain do not like the new diesel fuel and tend to shrink; I had to change mine. It is a very easy fix, just need the correct o-ring (not Ford). I'm traveling but have the info at home if you need it.

Let us know what you find out.

I think I have some of the water drain valve o-rings if you need them; I think I had to buy a large pack.

I would bet the drain valve on the filter housing. The o-rings do not like the newer diesel fuel. Check the website www.riffraffdiesel.com. They have the o-rings to repair this situation. Also google guzzle7pt3, he should have o-rings also.

Same thing happened to my 2000 f-250. The drain valve itself was leaking and the fuel was running out the drain tube and leaving a small puddle on the driveway.


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