Well, its not really falling on deaf ears. I'm going to change the fluid in the spring and then see what happens.

Also, to clarify, this gets to look like coffee. You can still see through it when its, say, a stream less than 3/4" deep.

But you should explain to all here how combustion gas at 500psi plus doesn't pressurize a 7 pound cap on the radiator. I'm willing to learn here, just don't see how that happens.