hey guys i know this has been done before but the mrs car is overheating at really weird times, only started the other day so i checked on here and bled the radiator and gave it a top up (just with water for now), but again the same problem today, can be driving fine for 20 minutes then all the sudden its getting the engine overheating and check powertrain warning. ive noticed when it does it there is a leak coming from a small plug looking thing around the trans that has a yellow ring around it but i have no idea what it is or what its for. ive attached a picture of where the water is dripping from, not sure if it may be a heater related thing or maybe thermostat? ive only noticed the leak when it overheats. also when it overheats it makes a loud banging noise from the front of the car(maybe the radiator) at first i thought it was one of the fans hitting the radiator every now and then.
circled is the plug and the arrow is pointing towards the front of the car
circled is the plug and the arrow is pointing towards the front of the car