Jehu
07-29-2007, 03:57 PM
I am getting the "Coolant Level" warning now more than i think i ought after an episode of overheating. Story started when i bypassed the heater Core and a company with whom i contract hurried me to finish the job before i could get water to mix with coolant and so i went off with just coolant to refill what had been lost removing the hoses. Just being too busy and forgetful i ended up a few days later making a long hard drive and the car overheated. I didn't drive it hot and shut it off within seconds of getting the warning,waited till the gage was at TDC then drove it with no rise for another half hour without adding any water yet and then it overheated again but again i shut it right off and sat about 20 minutes and drove to get water which i added and ultimately that night i was able to drive it home and have been driving it without overheating since. I took it two days after to a BMW dealership and had them flush and refill the coolant system and drove it that day with no incidents of either Coolant Level or Overheating. The following day i drove it and the upper radiator hose came off and i lost around two gallons and since then i have gotten the coolant level warning a number of times . I'd fill it to level and the warning goes off but i got it again today and i can't see any leaks from any hoses. I checked the oil and there is no evidence of coolant mixing and i have seen that so i know what it looks like ( Chocolate Milk) and no oil in the coolant that i can detect .I thought i read it is possible to leak coolant into a head port thru the gasket if the head is warped where it does not interact with oil channels. If i continue to lose coolant with no visible leakage from hoses is a compression test what i need to determine if the head warped? Maybe I haven't looked carefully at the lower radiator hose yet. Would that have been removed for a coolant flush? maybe they failed to properly tighten that as they did the upper one...