A slow coolant leak will evaporate before it drips. Add some UV dye to track slow leaks. They are usually from one of the dozen or so o-rings.

Wife's X is leaking coolant slowly I need to add a pint every couple weeks.

I recently found a drip hanging from one of the hoses on the bottom of the coolant reservoir tank.


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2011 E70 • N55 (me)
2012 E70 • N63 (wife)