Hello all, I'm in the process of trying to diagnose a heater issue. First off I have bled the system according to the factory service manual procedure (I even put the front end up on ramps and bled that way just to be sure.) and I have also noticed that once up to operating temperature the top hose that goes to the heater core will be very hot while the bottom will only be luke warm, is this normal? I have also noticed that if I turn off the heater and drive for a bit then turn it on the heater will blow hot air for about 5 seconds before getting cool again. I also notice that once I turn the heater on the vehicle gets up to operating temp very quickly (slightly below the half way mark) though it never goes above that mark. Any help or suggestions would be greatly appreciated, Thanks.