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mcmyk
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Very strange cooling issues. Any advise welcome.
Have had a run of mini disasters with my v70r and could do with some advice. I blew heater matrix to block hose a few weeks ago on the motorway. This emptied all coolant, and by the time I was able to stop the engine temp guage was in the red. Replaced hose, then discovered that the water pump had died. Replaced water pump, added new coolant and all seemed fine. Go for first extended drive, and the coolant light comes on towards end of drive, low coolant but engine temp remains fine. Top up coolant for return leg, coolant light stays off but within half an hour engine temp goes up. I stop, allow it to cool down, the coolant expansion tank is overfilled. When it is cold enough to open it the coolant disappears, so it's completely empty again. On arriving home I see that there is white smoke coming from exhaust. The expansion tank cap is now clearly allowing steam through.
Am I right in assuming that I have both fucked the expansion tank and the head gasket? What the fuck was going on with the coolant levels? Hydrolock?