[racing green rover]

I drained the cooling system today all the coolant was full of k seal I think I then flushed the radiator which had a clear flow through it and washed the expansion tank out I then filled the system with water and Holt's speedflush then tried to bleed the system by raising the expansion tank and filling whilst the bleed screw was undone and there was nothing, started it up revved the engine to 2000 rpm for 5 minutes and then there was bubbles and a jet of coolant from the bleed hole but the heater is still cold and the temperature rose to 108C so I switched engine off. Also as we had the cap off when it was 90c if I revved the engine they would be big air bubbles and it would start to overflow.