Slee
Absolutely you can do it that way. In fact that is what I would recommend doing if you have no pressure tester. The tester is nice because you can pressurize everything and then go over all of the hoses and tighten the whole system up while it is under pressure. You can find soft or bulged hoses this way as well. Something else you mind find as well is a radiator side tank that leaks like a pig when pressurized cold. I had one today, put 18 psi on it while cold and it gushed out the side tanks. This is something you will not normally find because by the time it has run long enough to build enough pressure to leak out it has also heated up enough to swell that joint up tight and prevent it from leaking. The only thing is that at a point it will get to where it leaks when cold and not under pressure.
Just go ahead and fill it up and then squeeze the upper hose a bit to get the bubbles out of it, top it up and run it. Do not be suprised if the coolant level light is on in the morning, top it up one last time if it is and then you should be done with it.
Mark
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