I would suspect a clog in the radiator.
It has not had time to go through the whole radiator
clogged radiator or bad water pump
The thermostat has not opened yet.
possibly a leak in cooling system
The thermostat has not opened yet.
i would drain the radiator and put fresh antifreeze in it
If if starts bubbling even if the engine is cold, most likely blown head gasket. If only when engine warm, stuck thermostat.
maybe the waters in a flask or has been next to radiator or maybe it came out of a cold tap
In your nasal cavities. The cause the other terrible feelings and conditions.
No. That would not be typical symptoms of a cold.
most likely you dont have enough coolant to reach heater core. make sure your full
A low coolant level could cause the temp gauge not to read correctly. A faulty temp gauge sending unit could also be the cause. The coolant leak, you would have to find the source of the leak to determine the cause.