OK, new water pump and coolant, and got heat again! I put it down to the knackered old pump - apparently it was about to implode.
Quote from: XJ Fan on April 03, 2015, 11:44:59 AMOK, new water pump and coolant, and got heat again! I put it down to the knackered old pump - apparently it was about to implode.cavitation around the impeller causing blade erosion?