coopsa4

Yes, tried all that, been out about 4-5 miles car running perfect, heater getting hot, still boiling noice at thermostat, forgot to say car has aircon, does this make any difference? Is there a place to bleed the rad? :confused4:

Help please. VR6 I have changed the heater matrix, dash out, took me a full day. Connected the heater pipes up and slowly filled with new coolent, no problems. Been out today and oil temp got up to 108, water temp 100. You can hear a boiling noise coming from the thermostat area, thinking I have a airlock I have taken the water pipes off the top of the rad and the heater matrix, refilled, been back out and still the same. The top water pipes seem very hot, the bottom radiator pipe is a lot cooler. The cap on the expansion tank is black and looks old, is this a good place to start? There is plenty of pressure in the system. Any ideas Thanks