Originally Posted by JWA
AT can you get your borescope under the intake from the back of the engine?
Since you're not seeing the leaking I describe I'm more and more curious where it's originating. (Hope I'm not clogging up your thread here.
I've run the scope in from the back and the front, driver and passengers sides. The valley seems to be wet with oil pretty much everywhere, and since it's mixed with dirt and dust, it's pretty hard to tell. It seems there is only the knock sensor, the CHT sensor, and a coolant pipe in the valley. The two sensors seem to be screwed into blind holes and I'm not leaking coolant, so that kinda leaves the headgasket or valve cover. Running the camera down the area where the heads meets the block under the manifold doesn't show anything obvous, and it looks like a valve cover leak would only allow oil to run down the outside of the block, rather than into the valley. I may try adding some UV dye to the oil, but my black light won't shine very far under the manifold as it's too big to fit. Fortunately, the leak isn't bad enough yet to keep me from driving, but I doubt it will get any better by it's self, and no doubt it will get worse eventually. So, it's time to button everything back up and head out on the next trip. Thanks for everyones ideas and suggestions...........