Lincoln Repair Questions? Ask a Mechanic for Answers ASAP
I am not Chris and I don't know what your previous conversation but I can tell you that the heater control valve would affect both sides and that is just one side isn't blowing ac, then it is most likely an actuator or door that isn't functioning.
As far as the overheating goes, a leak wouldn't cause the overheating unless the coolant level was low because of the leak. If the radiator core is leaking, then yes, it should be replaced. I used to work for a radiator shop years ago when they would recore radiators. If you can fix the leaks somehow just be tightening up some hose clamps or whatever then I would try just removing the thermostat for now and see if it still overheats or not. You can also boil the thermostat on the kitchen stove with a thermometer in the pot just to check while it's out to see if it was that.
I have to ask though, did they pressure test the cooling system and let you actually see these leaks? If not, rent or borrow a cooling system pressure tester and test it yourself and see if it might just be a loose clamp.
If the engine has electric cooling fans, do they come on?
Do you mean coolant overflow tank, like a degas bottle or the radiator itself?
perhaps you should start off with what engine this is and in what year, make, model. All I know is that it is a Lincoln.
is there anything else I can help you with?
That probably just means it's been leaking, replace that degas cap.
I meant the degas cap was weak and leaking from the hole in the cap meaning the spring is weak, not leaking from being loose.
Even if the degas is leaking it shouldn't be causing the overheating until of course the coolant level drops, so if the degas bottle has some coolant in it and the engine still overheats, then the first thing to do is replace the thermostat to see if that prevents the overheating, then worry about the leaks.
You are welcome and good luck and don't forget to rate me well so I get credit.
Do you still need help with this or not, if not, kindly rate me well so I get credit for the time I spent which is time I could have spent on a customer who paid me.