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Re: lincoln ls overheating
Cheap try is new radiator cap. If it cant pressurize the system the boil temp lowers considerably. If put new cap on and still over heat could have bad head gasket or a blockage in radiator...Cap is common and 10.00 to fix....
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SOUND LIKE COOLANT FANS HAS A FAULTY THERMO SWITCH LOCATED AT THE BOTTOM OF THE RADIATOR ON LEFT HAND SIDE.CHECK THE FUSES 8 IN THE ENGINE COMPARTMENT AND CHECK FUSE 16 IN THE PASSENGER COMPARTMENT FUSE BOX.WHEN ENGINE OVERHEATING IF BOTH COOLING FANS WORKING.OVERHEATING PROBLEM COULD BE BLOWN HEAD GASKET.CHECK ENGINE OIL LOOKS LIKE MILK HEAD GASKET LEAKING.SEE WHEN YOU DRIVING LOW AND HIGH SPEEDS THE COOLING FANS SUPPOSE TO BE RUNNING.IF THEY NOT RUNNING THAT IS YOUR OVER HEATING PROBLEM.
Believe it or not, new thermostats can be bad. Did you maybe get some adhesive on the thermostat preventing it to open fully? Is the thermostat installed with the crown up? The only other thing that I can think of, if it's a closed cooling system and the wrong radiator cap is installed, it won't hold the pressure, therefor overheating. The other thing may be the water pump. Many times the impellers will wear down internally causing to low of water flow.
If it's overheating in a matter of minutes from cold, it is probably not the fan or fan switches. If the gauge goes up that fast, it is often because of air in the system. When hot air hits a water sensor, the gauge will skyrocket. make sure the radiator is full and open any bleeders in the cooling system (if it has any) to purge all of the air out. Also, try turning on the air conditioner -- that should start the cooling fan -- to see if that makes a difference. One more thing: just because a part is new, don't assume it's good. I once saw a car overheating with no heat and a full radiator (classic water pump) with a new water pump on it. We took it off and realized the impellor (blades) was loose on the shaft! Good luck.