Is Protege (1999-2003) expansion tank pressurized. If not thanks, if yes, what's the correct pressure for the cap? Reason I ask is because I don't have the stock expansion tank.
I'm 99% sure that it doesn't have any pressure valve. I just walked out to take a look at it. The cap actually has a small seal but within the cap lid is a whole attached to a hose for the overflow...
And if for whatever reason it is, I would believe it's the same pressure if not lower than that of the radiator.
