I've just had a new engine put in my series II (1.9ZVH) and had it out over the last 2 days. I've noticed that the temperature has been sitting on about three quarters, the two fans ive got on are coming in ok but the car has been getting really hot - tonight on the way into town i noticed steam coming out of the bonnet and two leaking pipes. The pipes were solid and really hot, took the header tank cap off and it all bubbled over - the heaters inside arent chucking no warm air out either. Any theories??? I've had the head gasket checked today and it was fine, could it be an air lock???? If so how do i get rid?