Please help me identify this leaking part and how to fix it, as it seems almost impossible to get to from under the car.

The leak seems to come from a big nut looking part right above the oil sender on the passenger side of motor.

video below:

 

If that nut has a wire coming out of it (appears to), that's the knock sensor. Remove, clean, reinstall with a dab of RTV.

 

The "big nut-looking part" is the knock sensor, but AFAIK it's a blind hole, there's no oil behind it.

I've read that sometimes knock sensors will ooze some black goo, but never seen it in person.

--Ian

 

Thanks!

The more i look at this, the more i think its not oil sipping down...
Probably black sealant inside the knock sensor melted and leaked down, if it was oil, the stream would not be as neat.

Now i need to fix my other leaks... (cap on exhaust side rear engine, and front main seal).

I really hope my oil pan is not leaking, but its so wet under the engine, i cant really pin point the source of leaks. but i know for a fact the rear cap is leaking and probably front main and maybe cam seals.