Up-Date: Oil Spray Under Hood

[crusincrew]

Just got done doing a closer inspection. The oil residue is confined to the cast aluminum intake elbow (throttle body) and it's mounting flange, along with the spray present under the hood. The spray pattern on the hood is in the area directly over the intake elbow. When the motor cools down enough I will disconnect the plastic cool charge line and inspect it interior for residue if any. Where or how can engine oil contaminate this connection? I would like to understand this problem before an inevidable visit to the dealer. Any and all suggestions will be appreciated.

[spinninall4]

i just had this issue the o-ring on the icp sensor was finished sprayed oil everywhere start truck and have someone watch under the hood the icp sensor is in the pass valve cover its a easy fix if thats what it is

[crusincrew]

I did check that side of the motor also, all was clean no oil present. I spoke to a friend who is diesel certified (Cummins,Cat & Detroit) he mentioned that the turbo could be dumping it's lubrication oil into the engines air circuit and under boost its getting past the plastic connection pipe landing on the intake elbow. My turbo was re-built under warr. about 2-1/2 months ago due to a "coking" issue. Intake and hardware was removed for cleaning as well. I will be dropping it off at the dealer this evening.

[JW350]

Originally Posted by crusincrew

...When the motor cools down enough I will disconnect the plastic cool charge line and inspect it interior for residue if any. Where or how can engine oil contaminate this connection? I would like to understand this problem before an inevidable visit to the dealer. Any and all suggestions will be appreciated.

CCV is routed back into the engine via air intake. This is most likely where oil is coming from. How do your trubo/CAC boots look? If they're greasy and dirty, it's time to change those out (this may be the source for your leak). Also, you mentioned plastic cool charge line (this may also be the source for your leak). Ford did a customer statisfaction program a while back that replaced those with aluminum tubes.

[crusincrew]

Thanks for the replies. It turns out that the hood spray and the residue was actually Diesel fuel. When I posted the other morning it was just a light coating and the engine temp had burned or cooked it some leading me to thing it was oil again. When I drove it to the dealer that afternoon which was a good distance from work, I pulled in to the service area parked and shut the truck off. Immediately a mechanic walked over having noticed a large puddle and a large drip under my truck. My truck was gushing diesel fuel, upon inspection the mechanic realized (who happens to be the head diesel tech) that one of the pressurized fuel lines entering the fuel filter housing assy. had worked itself loose. He repaired it immediately and had me on my way. It must have just started coming loose that morning when I noticed the smell but, wasn't dripping yet. I hope this wasn't caused by any of the previous repairs my truck has gone through in the last 3 months. Let's see: turbo re-build and intake cleaning (due to "coking") @ 40k mi. plus $1400 for labor. My ESP plan wouldn't cover the labor. Next day EBP sensor failed (tech forgot to replace sensor after a "coking" repair). 3 wks later, turbo lubrication line failed to seal. Oil spray everywhere same tech re-used existing line during "coking" repair, line did not re-seat correctly and finally gave out. Also turbo plastic inlet tube was damaged during re-assy. (same tech). Lub line and inlet tube needless to say were replaced with new ones. Now I wonder how in the "hell" that fuel line could have gotten loose, let me see... Needless to say the service adv. who's been taking care of me this whole time feels terrible with my ordeal and promises to make it up to me in the future. Sorry for the lengthy write up, thought I share how quickly things can get complicated when someone's not taking care of business.