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Remove the radiator cap when the engine is cool and add the coolant into the radiator or you can add to the coolant overflow bottle. DON'T remove the radiator cap when the engine is hot!!!
you might have a blown head gasket and the coolant is leaking into the cylender and the engine is burning it.
Heat from the engine causes liquid to expand. It used to overflow onto the ground if it caused enough pressure to open the radiator cap. The overflow tanks were installed to automatically catch and return the coolant to the cooling system.
The engine coolant reservoir or the overflow bottle.
engine coolant
The gurgling sound is caused by pressure in the engine coolant system(antifreeze) slowly releasing into the coolant overflow resevoir. Typically a faulty thermostat causes this sound.
If there is no leak visible so you can see antifreeze under the parked car, you probably have a head gasket going bad. You may have some signs of steam in your exhaust, or at least a sweet smell coming from the exhaust. You should have a compression test done on your engine. That is exactly what the overflow reservoir is for. When the engine is hot, excess coolant goes into the overflow tank, as the engine cools,it draws coolant back into the radiator.
THATS WHAT THE OVERFLOW/EXPANSION PACK IS FOR. WHEN ANTIFREEZE/COOLANT BEGIN TO BOIL IT EXPANDS AND IT NEEDS A PLACE TO GO. THERE FOR IT GOES IN TO THE OVERFLOW/EXPANSION PACK. THIS PREVENTS DAMAGE TO THE ENGINE/RADIATOR AND OVERHEATING. THERE IS ALSO THE POSIBILITY OF A MALFUNCTIONING SENDING UNIT/GAUGE.
The overflow resavour is where you add coolant
if you can smell antifreeze, you have an antifreeze leak somewhere. you need to clean engine then look for coolant . it will generally pool on ground under vehicle unless it is leaking onto engine and burning off. note that the coolant will run so you may have to trace back to the actual leak. check all coolant fittings, such as hoses and check area round water pump.
It should be ok as there is nothing too terrible in the coolant. Excess antifreeze will just overflow. Try and get some out. Antifreeze can cause paint issues if the concentration is high enough...RR
Engine coolant is what I'm assuming you are talking about. Engine coolant is a mix of water and etholyn glycol (antifreeze). It pulls heat away from your engine block that builds up from the friction of moving parts. The coolant mix allows the coolant to get cold to a point and not freeze because of the etholyn glycol. It is also not good to put straight antifreeze into your engine because antifreeze does not have as much cooling potential as water antifreeze mix. Also if you have just antifreeze in your engine the antifreeze will boil at a much lower temperature than a mix of aproxamalty 50/50.