why does my Ford Explorer's engine run hot during long drives

Ford Explorer Fifth Generation (2011-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

4 min read

622 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix overheating issues in Ford Explorer's engine during long drives. Step-by-step guide with diagnostic and repair instructions.

Affected Component

Cooling System

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the radiator or working on the cooling system to avoid burns.

Symptoms

•Check engine light illuminated
•Temperature gauge reading higher than normal
•Coolant leaking under the vehicle
•Engine stalling or losing power
•Increased engine noise, such as knocking or pinging
•Sweet smell of coolant inside or outside the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the engine or cooling system.
2
Check coolant levels and inspect for leaks in the cooling system, including hoses, radiator, and water pump.
3
Inspect the thermostat operation by checking if the engine reaches operating temperature and if the thermostat opens and closes properly.
4
Examine the radiator for blockages or debris that could impede airflow.
5
Test the operation of the cooling fans to ensure they engage at the correct temperature.
6
Inspect the water pump for proper operation and signs of wear or failure.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Multimeter
•Coolant catch pan
•Soft brush
•Hose

Parts Required

•Thermostat
•Water pump
•Gasket for thermostat housing
•Coolant

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the engine or cooling system.
2
Check coolant levels and inspect for leaks in the cooling system, including hoses, radiator, and water pump.
3
Inspect the thermostat operation by checking if the engine reaches operating temperature and if the thermostat opens and closes properly.
4
Examine the radiator for blockages or debris that could impede airflow.
5
Test the operation of the cooling fans to ensure they engage at the correct temperature.
6
Inspect the water pump for proper operation and signs of wear or failure.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the engine is cool before starting work.
Disconnect the battery to prevent electrical shorts.

2. Replace Thermostat

Tools Required: Socket set, torque wrench, gasket scraper, coolant catch pan.
Remove the thermostat housing by unscrewing the bolts using a socket set.
Take out the old thermostat and clean the mounting surface with a gasket scraper.
Install the new thermostat in the correct orientation, and replace the gasket if necessary.
Reinstall the thermostat housing and torque the bolts to the manufacturer’s specifications.

3. Repair or Replace Water Pump

Tools Required: Socket set, coolant catch pan, torque wrench.
Drain the coolant from the system into the catch pan.
Disconnect the hoses from the water pump and remove any retaining bolts using a socket set.
Take out the old water pump and clean the mounting surface.
Install the new water pump, ensuring proper alignment, and torque the bolts to specifications.
Reconnect the hoses and refill the coolant system.

4. Inspect and Clean Radiator

Tools Required: Hose, soft brush.
Disconnect the radiator from the vehicle if necessary.
Clean the exterior of the radiator with a soft brush and hose to remove debris.
Check for internal blockages; if necessary, perform a radiator flush to clear any buildup.

5. Verify Cooling Fan Operation

Tools Required: Multimeter.
Reconnect the battery and start the engine.
Use a multimeter to check the voltage at the fan connector when the engine reaches operating temperature.
Replace the cooling fan if it does not operate correctly.