Over heating can incur expensive repairs, among which are cracked or blown head gasket and warped cylinders. The head gasket seals coolant passages in the head. When it’s cracked or blown, the antifreeze may go everywhere and wreak havoc on the engine. While a head gasket itself is relatively inexpensive, the labor costs to replace it isn’t. The same goes for warped cylinders, the metal tubes in which your pistons move. Cylinders are the central working parts of the engine. If one of them “dies,” especially in an older car, it can almost be cheaper to replace the whole engine than fixing it. So how do we know when the engine is over heating? There are early signs you will notice before damage is done.

Please follow the link below to read more:
https://www.spotdem.com/2019/05/05/early-signs-of-engine-over-heating/