It could if you are running it in very cold or very hot weather. In the winter, the engine has to warm the fluids and since the fluids are cold and thick, it takes more engine force to move them. In the summer, they are too thin so the engine isn't fighting the viscosity of the fluids. It's always best to make sure antifreeze/coolant is full. Always check them when the engine is hot. NEVER check Radiator HOT!
it can mess with both
Yes. If the engine is running too warm, from a lack of coolant, the ac will not work.
Yes. It would generally take a lack of oil or coolantYes. It would generally take a lack of oil or coolant
Lack of coolant, lack of coolant flow, air in cooling system, lack of airflow over radiator,........
Lack of antifreeze or wrong mix of antifreeze and water.
Because the engine is still running while in neutral. Your problem is probably your radiator or lack of antifreeze. Antifreeze serves as what it's name implies and as as a coolant. Additionally since the automobile is not moving forward the radiator is not receiving ventilation provided by the incoming air.
Look for leaking antifreeze/coolant. Usually you can see it leaking around the top of the engine. Also check your oil, if it looks milky it has been mixed with coolant and you intake manifold gasket is leaking. That being said, it is possible to have a leaking intake gasket with no sign of leaking antifreeze. Most intake manifold issues/leaks are coupled with poor engine performance and even sputtering and lack of power.
In the event that it over-heats and seizes, then yes. If your cooling fliud is plain water, and the engine hasn't frozen, then lack of antifreeze should not affect things in the short term. It is obviously desirable to have antifreeze in cold weather so the the enginge doesn't freeze. As above, if there is no cooling fluid at all, the engine will over-heat and sieze up.
It will destroy the engine from lack of lubrication and overheating.
lack of coolant . no cooling fan operation, low engine oil, improper coolant mixture, thermostat stuck, debri on radiator , restriction in cooling system.
Could be, lack of maintenance, abuse, lack of oil, lack of coolant, high mileage, exceeding speeds in any gear (abuse)
Antifreeze mixed with your oil will destroy the internal engine bearings and all moving components. The antifreeze will cause a lack of lubrication and all metal to metal surfaces will wear to the point of failure. There are tubes that run from the block into the head that carry oil and coolant. This is to cool and lubricate the head and valvetrain. In order to keep the coolant and oil in their correct tubes, there is a gasket between the cylinder head and block. It has holes cut into it that match the cooland/oil passages and allows it to pass while sealing around it. If your engine has run hot (the usual cause for a blown headgasket) it warps the head an leaves a gap between the head/block. When this happens the pressures inside the cylinder escape through the weaker gasket material, and usually break the seal on the oil/coolant passages. So now you have the oil and coolant passages where they can mix together. The main problem is that you have coolant in the engine oil. This is not good, since all the internal parts of the engine are metal. I would pull the head off and replace the gasket ASAP. Stop driving this car until you get this repaired.