I bought a c20xe to put in my car.
But before I do that, I wanted to clean the engine.
I turned the engine upsidedown, took the exhaust manifold of.
Put some tape over the exhaust holes in the cilinderhead.
And started to clean the block.
At some point I saw some oil leaking around the left exhaust hole(distribution side). I didn't know where it came from. So I went on cleaning the engine.
When I was finished with it, I took the tape away from the holes.
And some oil came out of the left exhaust hole. The other 3 are clean.