Originally Posted by Hayes
My manual says fill with coolent and run engine for 5+ minutes at 2500 rpm to purge air. Your manual is your friend so I wonder why so many of us don't read it?
yes, that is the correct procedure. What you're looking for is the fans to kick on, which will let you know that the thermostat has opened. There should be a significant amount of air come out at that point. However, if you have an 02 WRX or any Subaru that doesn't have a cap on top of the radiator, there is a great liklihood that you will still get air trapped in there.