Hi all. So my expansion tank give in the other day. Since I obviously need to replace the coolant, just wondering if I should flush the complete system including the block? Or will it be ok to just top up and bleed the system? I only recently got the car and the previous owner had the other bits of the cooling system replaced like the radiator, thermostat and water pump a short time before I bought the car. So I'm assuming the coolant was flushed. But I don't know if he used BMW coolant. Would it be ok to mix BMW coolant with whatever coolant is in there if it is not BMW coolant?
↧