I have just started to notice that I am getting some antifreeze run over, it just started. The engine is not overheating (185*) but if I let the engine idle to temp or I drive it for 15-20 miles and shut er down I get liquid out of the overflow tube. No, I don't have an oveflow tank, which will be remedied shortly. I've got a 15# PSI cap on now, but was told to reduce it to a 9# PSI cap. Comments?