Intermittent overheating issue I changed the thermostat and coolant temperature sensor

Good morning,

There are many possibilities for this but since this has been happening often, you may have damaged the head gasket from constant overheating.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

I would have a leak down test done on all the cylinders to determine is the head gasket is leaking into the cooling system. This is a test where they remove the plugs and insert shop air into each cylinder and look for movement in the radiator.

https://www.2carpros.com/articles/symptoms-of-an-overheating-engine

https://www.2carpros.com/articles/head-gasket-blown-test

A clogged radiator will also cause the overheating and the temperatures of the radiator need to be tested to verify as that may be the root cause of overheating and the reason for the head gasket failure.

Roy

Yes, from the failed head gasket. That is why you need to have it tested.

Roy