Camshaft Extra Lube

I wouldn't do that, fill it to the correct level with maybe 30 40% antifreeze and after start up check in the first minute to make sure level is correct then put the cap on. i would add a box fan in front of the radiator and maybe one pointing into the engine compartment. I broke mine in without the cap and water shot out of the radiator all over my engine, also if you knock your hose out or it overfills while your busy looking at gauges it might be a big mess!!