Im smelling a fish smell anti-freeze from my radiator and car starts overheating engine will start smoking until i park it for about 20 minutes...what is this..this 93 Ford Crown Vic.?

The smell of fish and overheating may indicate a problem with the engine head gasket. The head gasket is responsible for sealing the combustion chamber, preventing coolant and oil from mixing with each other. If the head gasket is damaged, coolant can leak into the combustion chamber, causing the fish smell and smoke. It can also cause the engine to overheat. Additionally, the smoke coming out of the engine could indicate that the head gasket is blown, allowing combustion gases and coolant to escape.

Here are some of the possible causes of a blown head gasket:

- Overheating: if the engine overheats, it can cause the head gasket to fail.

- Low coolant level: if the coolant level is low, it can cause the head gasket to overheat and fail.

- Faulty thermostat: a faulty thermostat can cause the engine to overheat, leading to a blown head gasket.

- Faulty water pump: a faulty water pump can cause the engine to overheat, leading to a blown head gasket.

To diagnose the problem, you will need to have the car inspected by a qualified mechanic. The mechanic will perform a pressure test on the cooling system to check for leaks, and may also remove the head gasket to inspect it for damage.

Replacing a blown head gasket is a complex and expensive repair, but it is necessary to prevent further damage to the engine.