sludge....pics

[electrolover]

fill it up till it runs out the valve covers.
i dont know if it will work or not but im willing to let yall give it a shot lol.

i know an old man that used to fill his up with diesel and run it 5mins or so.. he said it worked great.... maybe diesel is a little too thin to run on for me. but id wash one out with it

 

[SuperDave456]

Just use oils and short OCIs.
I've seen too many things go wrong with flushes or quick fixes.

 

[tig1]

Valve cover was most likely Alum instead of Mag. If you are interested I can tell you how to determine the differance. If alum, it could have been repared. I weld alum here at my shop( and most all other metals)