if fans are working and thermostat is good welcome to the world of northstar famous headgasket/faulty headbolt and stripped block crap engine problem
Sounds like a blown head gasket
It sounds like the antifreeze / distilled water mixture is freezing because the antifreeze mixture is too weak for the outside temperature Usually the antifreeze and preferably distilled water mixture is 50 / 50 ( Ford states to not exceed 60 % antifreeze )
Soundsw like heater core is going bad. You will smell antifreeze prior to actually noticing water/steam leak
Bring to a shop and have system pressure tested to find where problem is originating
AnswerIs the system overfull?, Is your gauge working?I had the same problem and I had to replace the head gaskets.
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when overheating occurs at highway speeds the cause is usually. a radiator or coolant circulation problem, Check for a restricted or clogged radiator.
Cadillacs are notorious for blowing head gaskets. You may want to look into that.
Dirty or plugged radiator Water pump Defective radiator cap Thermostat Cooling fan not operating hoses collapsing
The most common cause of overheating is a thermostat stuck in the closed position. However, other causes are: faulty water pump, clogged radiator, clogged hose(s), coolant leak or a broken drive belt. I had a 1987 legend with around 160K that was overheating. Antifreeze would boil out of the overflow. I changed my radiator and it fixed the problem.
The most common reason for The Lincoln LS over-heating problem: if it is warmer outside compared to what you have you temperature in your car set at the antifreeze fluids have no where to go so it floods your dagos bottle which in terms have a switch that tells your car it is overheating. you can take it to a mechanic so that if you have your car in the cooling mode they can put another reservoir on the engine to catch the excess antifreeze. it may be expensive but this will fix it.
Could be a problem with the engine cooling fan , water pump , restricted radiator , any body else have any ideas ?