Engine Overheating

Yes it sounds like it is overheating. First off I need to know when it happenes. Is it while driving or sitting still or all the time. Have you checked the coolant yet?

It sounds like you have a stuck thermostst. I would change the t-stat and rad cap and make sure the cooling fan comes on.

As far as overheating, does the radiator fan run? In not, check the fan system. Some makes and models, if you turn on the ac, the fan/s will run. Again on some makes and models if you unplug the coolant temp sensor, the fan may run. Just trying to find out if fan will run?

If the radiator leaks, you need to fix that. I recommend a new radiator, if that is the problem? Yes, you can use radiator stop leak or take the radiator to a radiator shop. As far as I know, if radiator tanks are plastic and the leak is in the tank, radiator shop can't fix it. They may be able to order new radiator?

Check for applicable trouble codes, see if it leads anywhere? To check codes yourself, at the least, you need an obd2 reader. Some of the national brand autostores will check codes for free. Check the coolant temp sensor

Have you ever replaced the thermostat? On a cool engine can you check for coolant flow through the radiator? If possible with radiator cap off, cool engine, start vehicle, watch the coolant, if the coolant level starts rising really fast, you may have a head gasket problem?

I can only make suggestions on what to che3ck, you have to do the testing.