how to find a leak in my Ford Explorer Sixth Generation (2020-present) coolant system

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

617 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 coolant leaks in your Ford Explorer (2020-present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Cooling System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool completely before opening the cooling system to avoid burns.

Symptoms

•Coolant warning light illuminated on the dashboard
•Puddles of green, orange, or pink fluid under the vehicle
•Overheating engine during operation
•Reduced heater performance inside the cabin
•Frequent need to top off coolant levels
•Hissing or bubbling sounds from the engine bay

Diagnostic Steps

1
Inspect the exterior for visible coolant leaks, checking under the vehicle and around the engine bay.
2
Check the coolant reservoir for cracks or signs of damage.
3
Use an OBD-II scanner to check for any related diagnostic trouble codes (DTCs).
4
Perform a pressure test on the cooling system using a cooling system pressure tester.
5
Inspect hoses and clamps for wear, cracks, or looseness.
6
Check the water pump for leaks around the shaft and housing.
7
Examine the radiator and heater core for any signs of leakage.

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
•Cooling system pressure tester
•Socket set
•Wrench set
•Screwdrivers
•Funnel

Parts Required

•Replacement hoses
•New radiator (if necessary)
•New water pump (if necessary)
•New coolant reservoir (if necessary)
•Coolant

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Diagnostic Steps

1
Inspect the exterior for visible coolant leaks, checking under the vehicle and around the engine bay.
2
Check the coolant reservoir for cracks or signs of damage.
3
Use an OBD-II scanner to check for any related diagnostic trouble codes (DTCs).
4
Perform a pressure test on the cooling system using a cooling system pressure tester.
5
Inspect hoses and clamps for wear, cracks, or looseness.
6
Check the water pump for leaks around the shaft and housing.
7
Examine the radiator and heater core for any signs of leakage.

Solution

1. Preparation

Gather all necessary tools and parts, and ensure the vehicle is parked on a level surface.
Disconnect the battery to avoid any electrical issues during repair.
Allow the engine to cool completely before starting work on the cooling system.

2. Pressure Testing the Cooling System

Tools Required: Cooling system pressure tester
Sub-steps:
1. Attach the pressure tester to the coolant reservoir cap.
2. Pump the tester to apply pressure to the system as per the manufacturer's specifications (usually around 15-20 psi).
3. Observe the gauge for any drops in pressure, which indicates a leak.
4. If pressure drops, inspect the area where the gauge indicates for leaks.

3. Repairing Identified Leaks

Tools Required: Socket set, wrench set, screwdrivers
Sub-steps:
1. If the leak is found at a hose, loosen the clamp and replace the damaged hose with a new one. Tighten the clamp to the manufacturer's torque specifications.
2. For a leaking radiator, drain the coolant, remove the radiator, and replace it with a new one. Reinstall using the appropriate bolts and torque settings.
3. If the water pump is leaking, drain the coolant, remove the water pump, and install a new pump. Ensure to use a new gasket and torque the bolts to specifications.
4. For cracks in the coolant reservoir or any other plastic components, replace them entirely.

4. Refilling the Coolant

Tools Required: Funnel
Sub-steps:
1. Refill the cooling system with the appropriate type of coolant as specified in the owner’s manual.
2. Start the engine and let it reach normal operating temperature while checking for leaks.
3. Top off any coolant as necessary and ensure the system is properly bled of air.