problem solved ..... seems it was just an air lock in the system and only way it wanted to come out was with the front of the car up high on the jack with cap left off , lacked it up heard a gurgle , bottle needed topping up a far bit, left it running for about 40 min and have hot air inside the car, hot rad, no gurgling or bubbling , have drove it for about 30 miles and needle dont even hit the half way mark

mad the air only came out when the car was lifted at the front tho .