Thanks for the advise! when I initially changed the thermostat I did burp it by doing what you said and also squeezing the radiator hoses but maybe I didnt do it correctly . Also I just went to check under the hood and noticed that my reservoir is full but when i checked the radiator it seemed to be low/ empty. Last time when i worked on my car I filled the radiator all the way to the top but now is no longer filled to the top. is this normal ?