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planenut · 16th April 2019, 12:12

I would suggest that whilst running the engine, once the heated water rises to the neck of the filler put the cap on, switch off the engine, allow to cool then check the level.

16th April 2019, 12:12	#10
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,951 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	I would suggest that whilst running the engine, once the heated water rises to the neck of the filler put the cap on, switch off the engine, allow to cool then check the level.