Watched the second video twice.

That's exactly what the oil is going to look like in a partially rebuilt motor (top end) when you're fighting overheating issues (and therefore not running it long enough to get the oil warm).

It won't hurt to drain the oil and look at it (the rest of it is going to look the same).


Get (all) the air out of the top of the intake + radiator and your problems are probably solved.


Have you got an electric fan ready to run on the radiator?

What turns it on? - I couldn't tell from the video.