Hi all,
Just wondered if anyone knew if there is a valve internally in the header tank/expansion bottle on Disco TD5, I ask as when i was cleaning the unit out before refilling coolant a small rubber plug like disc fell out of the main hose inlet/outlet?? its about 12mm diam and 8mm tall with a small hole half way thro??
Im now about to face facts and swap my cylinder head as flushing etc has made no difference to the water pressurising issue but thought id ask before purchasing a new bottle if needed
Thanks