Hey guys I just noticed this problem so i dont know how long its been like this. When i daily drive my car it runs just fine, no overheating problem etc. but when i get on it real hard, like doing a couple of 3rd and 4th gear pulls to redline i noticed that my coolant reserve is filled with coolant, but my car doesnt overheat. Next day of driving normal, the coolant reserve is near empty. Is this a early sign of a headgasket problem or is this normal?