Hey guys, So my '02 Cooper (aspirated) just started overheating today while I was idling at the lights! The fan would kick in while the temp gauge would still be reading normal temperature levels, then after 1min or so of the fan coming on, the temperature gauge would spike up to about 3/4 of the way up the gauge. It stayed there for about 20secs, then came back down to be pretty much bang on the centre again. It did this every time I was idling for more than about 1min. If I started moving while the gauge was creeping up or at its highest point, the gauge would immediately drop back down to normal... This was all on a 21 degree day with a cool breeze & a/c was off... I've just checked the car out as best as I can based on some forum searches, fan looks as new (and is on the correct way!), radiator & hoses look great besides a few fresh bugs in the radiator (both were replaced by the previous owner around 18months ago), but coolant level is sitting *slightly* under the 'min' line. Would that tiny bit less coolant be enough to make it overheat like that, or should I be looking out for something else before I go to the auto shop tonight?
Cheers in advance for your help!
Ethan
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