1. Can you open the oil pump bleed screw at idle or will it actually suck air in?
1a. What does the oil pump solenoid do? (The bit with wires coming out of it on the front of the oil pump)
2. If you fill the radiator from the filler cap do you need to loosen anything else off to remove air bubbles or will the engine driven water pump do the job?
3. How hot does the cooling system have to get before it starts to overflow into the expansion bottle?
4. Oh, and does anyone know a good way to get rid of the green staining on the inside of the expansion bottle so you can actually see the fluid level again?

Thanks
Richard