the header tank boiled over and was spitting etc both rad pipes and radiator are really hot but the temp gauge reads normal temp middle of the gauge? any suggestions??
fill up with water and coolent, leave cap off start it up, turn up heating on full, leave to tick over, topping up as you go, when no moor air comming out replace cap job done..
Should be no need to, but you can make sure it is clear. No obstruction. Slow fill with engine ticking over, heater on hot, squeeze hoses to force air out. Try that.