Hi guys. I just bled the air out and filled her the correct way. Idled her about 10 or 15 mins. Rode her around the block a few times and she held. Ill double up the time tomorrow again. Like i said, everything went awry when i opened the overflow tank while runnin hot, put a bit of coolant in and closed her. The noise she made from the overflow tank/area was a real weird pressurising squeele. Really weird. Im hoping i got air in the system and now things are ok. Ran cold with cap off. No bubbles. No pushing out. Happy weekend everyone ... Go spurs go.