Why is my engine overheating?

It happens when I'm doing long drives on the freeway. When the car b is under more stress I guess. By coolant you mean water right? Sorry I'm not to experienced.

When I got home I took off the radiator cap and filled it up with water but it filled uo with just a few ounces.

I installed a new fan motor and it started working and the engine does not overheat anymore thank you!

Ok, I have brought my car to my mechanic twice for this issue, and they can't find a thing wrong. My thermostat fluctuates, sometimes going all the way to H. I turn the heat on, and it goes down. Last night it was doing it again, so we tried not turning the heat on, and the thermostat stayed up to H for a minute, then slowly went down on its own. What is wrong with this car?

Thank you for responding! I have had a pressure test, thermostat was tested, the whole car, and the fluid level is checked every morning, just to be sure. The whole car is fine, is there anything else, or is it a recall issue?

Thank you KH!

Thanks ASE, my car had been referred/brought to the dealership, where even they are having difficulty figuring out the issue, as it is not doing it for them, and they cannot find a broken cracked or leaking part. Thanks to all! Hoping the dealership can determine the issue, as I really like my car! I was just hoping for some ideas :)

Overheats after driving eight to nine minutes. Changed both thermostats tested old both opened. Low coolant never see leakage. Was told 20,000 when I bought blown head gasket or cracked head also they added sealer in radiator copper bits in rad not much. No problem for 18,000. Burped coolant. Car sits in driveway at startup fifteen minutes does not overheat, the fans come on when temp rises to just above normal. Drive it seems okay for nine minutes. Six months ago hot day AC stops. Month later had low coolant a couple times I added more okay. Then temperature rises on hot daytime +80 driving but could be controlled with heater on. Let temperature rise almost to the top of gauge a week ago. Since then overheats more heater is not enough to keep cool. This week replaced two thermostats did not burp correctly. The next day burped fifteen minutes properly had bubbles etc. Now at normal temperature in neutral for burping today again okay in driveway drive it eight to nine minutes overheats. I cannot be sure top thermostat little hole is in correct position. I looked for one but do not recall seeing one. Thanks

Hello
I flushed the radiator, burped it. Then is sat running in the driveway for ten minutes does not overheat. I noticed the tiny bubbles in the coolant. However, I rigged a funnel to the radiator opening to have coolant above the radiator that is when I noticed the bubbles. While parked no problem I drove it for five minutes and it got almost to the top of the gauge. Seems like a head gasket.

Also the car sits in neutral (manual transmission).
No overheat issue, I can turn the AC on when the engine is still very cold and right after start. The fans will come on. Is that normal?