I might insert as much as about a pint or so of distilled h2o.. any more and I'd get some coolant To combine. if it goes off yet again, convey it for the seller. its possible just evap lack of the water part of the coolant mix. glycol doesnt evap https://dospoilersoncarsdoanythin16159.boyblogguide.com/26918797/the-smart-trick-of-types-of-coolant-for-bmw-335i-that-no-one-is-discussing