just did complete coolant flush of V6 VP (like in the how too section). added 4L to the rad, started car, added about 1L to rad again waited for thermostat to come on. When it did, the rad started to overflow so I put the cap on it. Proceeded to bleed when fan shut off via the thermo bleed screw. Waited 2hrs for cooldown then checked rad level and it was full. Should the car not have wanted more than 5L?????? also, when thermo is open, the heater hose is still compressible, any ideas???? thanks