I have a 2002 Lincoln ls v8. It overheats after a short distance of driving it. I have replaced the thermostat. The fan comes on an it goes into engine protection mode fans come on but still overheats

Hi,

Given what you have already tried, here are some other things to look for or check:

1. The condition of the coolant - is it contaminated? When was the last time the system was flushed or cleaned?

2. The strength of the coolant protection - the coolant should contain anti-freeze protected to a minimum of -20F.

3. Is the coolant circulating? When the engine is COLD, you can remove the radiator cap (also check the cap). Let the engine warm up with the cap removed and see if the coolant is circulating through the top of the radiator - you may have to remove a little of the coolant to observe this. This will let you know if the water pump is working. Make sure the drive belt is ok.

4. Check for extra soft upper or lower radiator hoses. They can sometimes collapse internally although this doesn't happen frequently.

5. Check the A/C condenser and radiator for plugging or debris collection. Clean as needed.

6. A bad head gasket. They make a kit to check for the presence of carbon monoxide (CO) in the coolant. Try a local auto parts store.

7. Pull the dip sticks on the engine and the transmission. Look for excessive transmission fluid level and pink coloring (this indicates that the internal transmission cooling tank is ruptured). The transmission may be damaged.

8. Make sure the cooling fans are operating properly and coming on at the correct time. There could be a bad sensor or fan(s).

9. Check for any DTCs (diagnostic trouble codes) from the OBD port.

10. A bad temperature sensor or gauge.