I checked it last night and connector was tight, Truck did not surge this morning, will see tonight on the way home. thanks again for all the help,,,

 

I had the same thing happen. The upper house blew off and banged off the bottom of the hood. It made a heck of a boom when it popped off. Luckily, the day before I had the dealership install the hood blanket that was missing. It tore a hole in my new blanket. It wouldn't have surprised me if the hood got dented without the blanket. The dealwership was also trying to locate the source of some oil that was being blown up onto the bottom of the hood. My guess is that they took this hose off to inspect and didn't tighten it enough.

I used a dime to tighten the screw because I didn't have tools with me.

 

Mark78F250: I think I've got a lock on that oil being blown on the bottom of the hood. That's exactly what happened to me on the last tow. It was blowing oil out from that intercooler-to-intake mfd tube. It oozes out of the intake side and goes all over the place. I noticed a blotch on my hood just like that, anyway. It might also look like a Power steering leak, but look up...that'll be the intercooler connection I'll bet.

I think what we're both getting is what I call PCV blowback. When the turbo is at full boost for a long time, the pressure inside the engine is high, and this forces some oil out the PCV vent line, which hooks up on the suction side of the turbo. Thus, a small amount of oil gets blasted into the turbo and blown thru the ductwork. It seems to come out at the plastic duct, I gather because it won't seal as well as a rubber hose will. I think this whole thing is what makes those ducts blow off in the first place. It won't show up as oil consumption on the stick, so I wouldn't worry about it. The annoying part is having that tube slip or worse blow off. The old 7.3 motors had an oil separator on the PCV line to stop this problem, but it isn't visible from the outside on the 6.0, so I gather it is not there. I don't know how much research anyone else has done with this yet though.

 

CowboyBrett - The funny thing is that the dealer could not locate or figure out what was causing this oil under the hood problem. There wasn't that much there, but enough that I noticed it. I'll take your post into the dealership if it's still doing it. I havn't checked in a while.
Thanks,
Mark

 

Hi Guys: In March I had a similar problem to Cowboy Brett with the intercooler hose entering the manifold. Oil was being sprayed onto the hood but the tube didn't blow off. I asked the Ford Dealer about this and the diesel tech said it was normal don't worry about it. I was about 1500 miles from home at the time and ignoring it didn't seem like the right thing to do. I went to an auto parts store and got some high temp. silicone and carb cleaner cleaned the inside of the hose and the casting put a thin layer of silicone on the casting slid the hose over it tightened the clamp and have not had a leak since.
Tim: I was wondering why in an earlier post, you said not to use carb cleaner but brake cleaner instead?

 

Carb cleaner does leave a residue, break cleaner does not.

Spray you bench with both, wipe with paper towel. You will see.
Carb cleaner is great stuff; do not get me wrong,

 

Thanks Tim. I just learned some thing else from this site.

 

That is what is so great, I too learn everyday

 

hey guys so the blue hose connections having oil on them is normal? I use my truck for a daily driver and tow a small boat. both of the blue tubes appear to have oil seeping from the inside out. no oil consumption at all..

 

Mark - You're welcome. I hope that helps. I noticed that oil under my hood in the Ozarks, and the tube never blew off. I kept an eye on it, and when I rolled into AZ I saw it oozing out of that elbow that goes into the intake manifold. Before that I had suspected a Power Steering leak since the oil didn't drop on the dipstick, but on closer inspection it was oozing out of the intercooler too. When I took the I/C to manifold tube off, I pulled the air cleaner out too so it'd be easier.

Tim - Another good reason to use Brakleen instead of carb cleaner is that Brakleen isn't flammable and carb cleaner is. I don't know what some of those light hydrocarbons would do to the diesel, so I stayed away from it.

X GM Guy - I'm glad I'm not alone on this. I took it all apart and that's when I saw the telltale oil marks you get from blowback. Ford's right: blowback is normal under high-boost conditions. Boost will raise the pressure inside the crankcase, which can cause oil to ooze out the PCV vent line (which on the 6.0 goes into the Air Cleaner-to-turbocharger inlet hose). Actually, blowback is rather common for all engines under high-load conditions, gas or diesel, turbo or natural. It only hurts us because that seal isn't oil tight and because we have a slippery plastic-plastic junction at the intercooler on that side. My I/C connection is barbed, and that doesn't seem to be the problem for the folks anyway. It seems to hit everyone up top by the intake manifold. If you make sure that hose clamp up top is thight, then the plastic ought to only slide back to a point, hit the barb on the aluminum part, and stop.

 

so far oil leak appears to be fixed since I cleaned the tube. it had been leaking where the 2 plastic tubes join as seen in my photo. however truck surged again tonight while coasting at about 10mph, luckly there was no one in front of me as the truck lunged forward. Whats the deal with this. I didn't have a place to try to pull over and restart as Tim suggested but was fine the rest the way home.

 

Matt1751: What did you clean it with? Carb cleaner might light it off. I think Tim already got you on checking the clamps, but I want to take you further...did you check and make sure their isn't any oil or junk pooled up in your intake hose? I've heard a story from a Ford tech at an emissions meeting about "runaways" and oil/diesel getting in the airbox and pre-turbo hoses.

 

I cleaned the tube with Break cleaner and let it dry, there was no oil left in the tube and it was dry at the elbow on the manifold. Are you saying if there is oil in the airbox it would cause it to surge? If I take it out and romp on it will that blow it out if there is any there? also its intermittant and has only done it twice but in the past few days,

 

Mine blew off in downtown Cincinnati two months ago while towing a heavy load and put two nice dents in the hood. My truck doesn't have the blanket.

Bill

 

Matt-
Geez. I'd just take off the hose going into the turbo from the airbox and see if there's anything in there. I don't think there will be though. Other folks have posted in the past about checking all the clamps for a tight seal, but I doubt that too. I don't know of anything else that would cause a surge like that. Maybe someone else does?