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Mercury Grand Marquis Overheating

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my Mercury Grand Marquis overheats?

While there are a variety of reasons your Mercury Grand Marquis is overheating, the most common 3 are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat.
41%
of the time it's
Coolant leak (water pump, radiator, hose etc.)
32%
of the time it's
Radiator Fan
17%
of the time it's
Thermostat

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See what others are asking about their Mercury Grand Marquis. Get answers from RepairPal's community of auto experts and enthusiasts.
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Related Mercury Grand Marquis Problems

Find the most common driver-reported problems that are to blame when a Mercury Grand Marquis overheats.
The Mercury Grand Marquis 4.6L V8 engine is known for displaying the normal symptoms of a coolant leak, including ove...
The 1996-2001 Mercury Grand Marquis with a 100% plastic intake manifold  is known for engine overheating, even with n...

Mercury Grand Marquis Overheating Repair Symptoms

When the radiator fans stop functioning properly, the engine temperature will rise as there will be insufficient airflow to cool the radiator. The spike in temperature will be t...Read More
A failing radiator can cause the engine to run hot or overheat. Most radiators are made of metal and plastic. The plastic parts can become brittle and crack over time, causing a...Read More
A thermostat that is stuck open can cause the engine to run colder than normal and set the Check Engine Light. It may also cause poor fuel mileage and the heater to blow cool ai...Read More
Water pumps require replacement if they begin to leak coolant or become noisy. Leaking water pumps can result in damage to the drive and timing belts, as well as cause the engin...Read More
If the fan motor does not work, there will not be enough air movement through the radiator to dissipate the heat in the coolant. The symptom usually associated with a faulty fan...Read More
A coolant leak may be noted from the hoses. Coolant hoses can be damaged by oil leaks, or age. This will lead to swelling or cracking, it is suggested to replace the hoses befor...Read More
When the cooling system is not working to its full potential, normally due to a leak, the engine will being to run increasingly warmer with time and vehicle use. This is because...Read More