Originally Posted by Maikelo

I still dont really understand what is happening.

I let all the coolant out of the system by opening the bolt with the butterfly wings on the radiator. After that I can only fill just about 3 gallons of new coolant.

What am I missing because it should be 17 to 18 quarts? I used a vacuum on it and still the same... Put it on an angle because of air buble but still the same.

engine temp is also at normal operating temp when I let it warm up. Thermostat also works normal.

Originally Posted by TW97C1500

Wait a second! 3 gallons is 12 quarts. "Quart" = one quarter of a gallon (1/4)

U.S. quart is 32 ounces(fluid). U.S. gallon = 3.78541 liters