I tried to change coolant of my 2006 Sentra for the first time. The cooling system capacity of my car is 1 3/4 gallon.
I opened radiator drain plug and drained the radiator and the reservoir. The total amount of liquid that drained was a little over a gallon. I started the car and revved a bit but nothing really came out. I refilled about a gallon of distilled water (less than what came out) and ran the car for just a couple of minutes and the heat dial went to half position (standard operating temperature I notice during regular driving). It never goes that fast and that means there is a lot of air in the system. I tried to burp by pressing upper and lower radiator hoses. Some air did come out, but I assume not much.
I plan to drain this water in the evening (once the car cools down) and refill with the coolant. How do I make sure that all liquid comes out? Can I rev the car when I am draining the liquid? What happens if the heat dial goes up or can I let the dial go up to the operating temperature while draining the liquid?
(The engine block has a drain plug but it is not easily accessible so I can not really open that to drain rest of the liquid.)
What is the sure shot way of removing all air from the system, other than burping?
Thanks a lot in advance.
(P.S. - As I said, this is my first attempt and I am little panicked.)