Ouch, tough one. You might be able to have a machine shop drill and tap a hole that would let you screw a pipe in to hook up a tube. It would depend on what is directly behind that hole in the engine. Consult a machine shop or mechanic.
You will have to replace the refrigerant, but not the engine coolant.
Your coolant pump is behined the fan, you will have to replace the water pump.
I had a split in the coolant hose that goes to the turbo. It sits down behind the engine and next to the firewall. It was very expensive to replace the hose and labor intensive because of how difficult it was to get to it..
Open the drain out valve at the bottom of the radiator to allow the coolant to run out. Replace the valve and add the fresh coolant.
The coolant temperature sensor can be found on the front of the engine, near the thermostat. Remove the coolant temperature sensor retaining nut, to replace it.
If there is coolant on an engine, it is likely a seal or a hose is leaking or broken. It should be repaired immediately or the engine may seize up and quick working.
in the engine compartment on the firewall right in front of the passenger and right behind the coolant bottle.
check/replace the engine coolant level sensor located in the engine coolant overflow reservior (located at the rear of the engine compartment pass. side)
Flush and replace the engine coolant. Replace the engine timing belt or chain. Replace the spark plugs & wires.
A = Replace engine oil1 = Rotate Tires3 = Replace Transmission Fluid5 = Replace Engine Coolant
A = Replace engine oil 1 = Rotate Tires 3 = Replace Transmission Fluid 5 = Replace Engine Coolant
Low engine coolant or ineffective coolant. Add or replace anti freeze