We have a Mazda Xedos 2l V6. Yesterday as I was driving the temperature gauge shot up to the red. I pulled over asap and when I stopped it went back down. Put 1 litre of water in (in the dark )and all seemed well. Carried on and a bit later the heater blew cold for a couple of miles.Just got home when the temp. gauge went up again but no obvious coolant leaks. I have checked the coolant level and fuses and all are ok.Any suggestions gratefully received.Many thanks.
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