Asking for input about a possible oil leak

[Battleship]

I’m in the middle of a TB job (the first I’ve done). 170k. Going well, but there’s a lot of oily crud on the PS of the front of the engine. I don’t know if you can see in the photo, but where the flat TB cover and the serp belt tensioner bolt up next to the TB idler. You can see some on the TB tensioner, although I might have wiped that off pre-photo.

My best guess is the cam seal (the oil I can see looks like motor oil). If that’s it, I suppose I can either ignore it and continue, or get the truck towed to a shop/dealer. I don’t see any leakage around the valve cover. The TB components are dry as a bone, FWIW.

So I’m wondering what people think it is, and what they would choose to do about it.

 

[H E A V Y M E T A L]

More photos, and put some light in there so we can see. I always love a oil leak hunt it's like playing detective.

 

[Battleship]

More photos

Thanks for the help, I was pretty annoyed when I was posting that. As much as I wanted to do the TB, I felt like I had to get fixed properly, so I had it towed to the dealer Saturday morning. I'll let you know what they say.

The front of the engine is thick with oily dirt anywhere that isn't covered - the orange stars. The green star is where liquid oil was sitting in a little groove. The cam seal or the valve cover were the only things I could think of.