Originally Posted by
Cosnada
I don't think it is head gasket. I tend to agree with Mechanic - heater control valve but could also be the thermostat or blocked heater matrix.
So if the heater matrix is blocked, or the thermostat is gone, will that cause the engine to overheat like im experiencing?
It wont overheat if I'm drving at all, only if I sit still in traffic, or just sat idling for a while it will start to overheat, but it never goes into the red, never has, the fan kicks in way before it even gets close to the red.
Cheers for all your help so far.