Sounds like the water pump vanes are worn away with reduced amount of water circulating the engine. If you do need to dump heat out of the engine in a hurry to save your head gasket, turn the cabin fan, the heating up to full and the air con on to get the radiator fan to rotate.
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Tek-Emo Villis Emo Bis
V70 SE NAV 1.6 D2 2015MY POWERSHIFT, D4162T, 93000miles, RED.
/VOL FCR/PEPER OBD2/Acron 9135 OBD2/L.E.D Flasher/VDASH/ANCEL BA301/Topdon Top Scan
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