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Originally Posted by dingdong1960

Hello there ..thanks all for helpful replies ..Arctic ...demist test ????think i had done approx 10-15 miles ..its all hills around here !!! ..diesel tourer i had previously was exact opposite ..ran really cold til i did thermostat in top hose trick ...temp gauge rises to half way and stays there til i up a bl**dy hill !! i then have to put heater on full to help cool it ..fan comes on ok ..also starts rattling too ( water pump impeller ?)...its not losing or using coolant ..nearest 75 guy cant look at it til mid june ..

99% as T-Cut says.--Thermostat.

Bubbles as the water boils make a noise. --( Re. Your electric kettle.- )
At the sea side the noise you hear as the waves break on the shore come from the bubbles formed as the waves break.

Not a lot of folk know that.---