I have a 1990 Loyale, 300k miles, beater but generally reliable car.
Its been running hot from time to time, but yesterday was running close to the red on temp gauge.
Added coolant, but noted there is a leak coming from the plastic nut located just above the drain stop cock.
Pulled that leaky nut out and found the threads and washer are shot.
Can anyone tell me the purpose of that aperture into the radiator?
Can I just replace that or plug it with a similar nut, or do I need a specialized part?
Alos note the fan is not working. How can I tell where the fan faiure lies? Fan Motor? Controll Unit? Thermostat?