[rtstrack]

I'm trying to figure out if my cooling system is working properly and could use some help. I have a coolant catch can mounted below my radiator with a small hose connecting from the top of the radiator to the bottom of the catch can. When my car is completely cold the catch can is filled with coolant. After running for awhile and checking the catch can, it will be down about half way (20 ounces or so). Then when the car cools again the catch can is back up to the full mark (no coolant loss). Is the system working properly? Is the engine full of air and then being replaced with coolant as the engine starts to warm up? Thanks

Ryan