Quote:
Originally Posted by 1320boy
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That bit usually happens when there is air in the water passages in the engine. The temperature sender is reading water, needle goes up, temperature sender reads air, needle goes down.
Park the car so that the radiator is the highest point. In the morning when the engine is cold, take the radiator cap off, to check that the water level is right up to the cap, if not fill it up, and check it again the next morning.
Harvey.