Is it hurting the car to not change the coolant in the reservoir? Not tremendously, but still better if you can change it. Getting most of it out is as simple as a 3' section of clear hose from the hardware store to siphon it out if you don't want to invest in either a siphon pump or liquid pump.Supercharged. Ok. So I don’t have to change the coolant in my plastic reservoir when I do a drain and refill
All I have to do is open petcock on radiator and drain fluid out then refill radiator.
Supercharged is it really hurting car if I do a drain and refill and don’t change coolant in reservoir. Thanks.