I'd include up to a couple of pint or so of distilled h2o.. anymore and I'd get some coolant To combine. if it goes off all over again, deliver it on the seller. its very likely just evap lack of the h2o part of the coolant mix. glycol doesnt evap https://automotive-battery-charge55508.mybloglicious.com/48480519/the-basic-principles-of-types-of-coolant-for-bmw-335i