Ok, So heres the picture: I needed to replace my temp gauge sensor and i was having to drain some of the coolant off so i thought i would change the thermostat to a genuine BMW one............so all the car is back together now.
Ok So, i took the bleed screw out to replace the coolant and followed the 'haynes' advise to fill up until coolant came out of the bleed hole.
So, i have started the car up and all seemed well, but........... now the engine is overheating..........obviously when it gets to the red i switch off.
Tomorrow i am going to check the thermostat is installed properly as it was a bit of a bugger to fit.
BUT, CAN ANYONE GIVE ME CLEAR INSTRUCTIONS AS TO HOW TO CORRECTLY BLEED THE AIR FROM THE SYSTEM. I AM HOPING THIS WILL CURE THE OVERHEATING