95 7.3 oil leak from intake - can it be fixed without removing the cylinder head?
I have an oil leak that drove me nuts trying to diagnose. I did eventually figure out where it is coming from, but now I need to figure out how to fix it...
It originates in the valley area but does not run out the hole in the back of the valley - the valley itself is completely clean & dry. The leak runs along the crack between the left cylinder head and the block (where the head gasket is), from front to back, and then runs down the back of the block above the starter and ends up dripping from the corner of the manual transmission housing or pooling up in the flywheel cover. Cleaning everything off and running for 100 miles or so, the oil starts to show up in a non-visible area under the rectangular shaped intake adapter and follows the head gasket gap to the back of the engine. I was unable to tell (and neither was a Ford Truck dealership mechanic) whether the leak is from the cylinder head, head gasket, or the intake seal to the head (there is no gasket there, just sealer). So what I did was shove some RTV silicone into about a 1 inch section of that head gasket gap near the back of the engine behind the intake in order to make a 'dam' type of thing, which worked - now the oil hits that dam of silicone and runs down into the valley instead of following the head gasket gap around the back of the cylinder head & block.
All this has led me to hypothesize that the leak is from that "intake adapter" as it is called in the service manual - the rectangular metal thing bolted to the head and with a round connection where the turbo charged air tube goes in.
Now in my mind there should not be any oil in there, right? That is only air coming from the turbo and going into the combustion chambers? But the dealership guy says those intake seals do leak oil, so that makes me think the turbo is sending oil into the air intake system or something. But I am not having any unusual smoke or drivability issues so I'll cross that turbo bridge when it becomes a problem.
So my current situation is that I would like to remove and re-seal that passenger-side intake adapter. The service manual says (as does the hourly-paid dealership mechanic) that the cylinder head must come off the engine in order to remove the intake adapter; it is not servicable with the head attached to the block.
It looks to me like it would be possible to get that intake off except for one bolt which is wedged up against the front cam gear cover at the very front top of the engine. There's no way that bolt is coming out without either removing the head or the cam gear cover.
Has anyone else seen this same intake oil leak problem? Anyone ever manage to get the intake off without removing the head? Did it fix the leak?
Any advice is appreciated.