Checked the coolant level on my 15CS this AM when the engine was cold. The small red pin was at the MIN level. Added a half quart of approved coolant/distiller water 50/50 mix. This brought the level to jus above Min level. I next added a cup more which brought the indicator way above the MAX mark. No coolant showing in the filler spout. Do I some how need to remove some coolant? Ran the car up to temp with no warnings and no overflow, but tank is sealed. Can't check level again until car is cold. Any help would be appreciated.