why is my Ford Explorer Fifth Generation (2011-2019) losing coolant with no visible leaks?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

hard

Difficulty

high

Severity

3 min read

525 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 loss issues in the 2011-2019 Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Cooling System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool before starting work on the cooling system
•Disconnect the battery before working on electrical components

Symptoms

•Coolant reservoir consistently low despite refilling
•Engine overheating or reaching high temperatures
•Sweet smell of coolant in the cabin or engine compartment
•White smoke from the exhaust
•Presence of milky substance on the oil dipstick

Diagnostic Steps

1
Check for Diagnostic Trouble Codes (DTCs) using an OBD-II scanner
2
Inspect the radiator cap for cracks or damage
3
Perform a pressure test to identify any small leaks or weaknesses
4
Inspect the engine oil for coolant contamination
5
Inspect the coolant for oil contamination
6
Inspect the heater core for leaks

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
•Pressure tester
•Socket set
•Torque wrench

Parts Required

•Radiator cap
•Coolant hoses
•Radiator
•Heater core
•Head gasket

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check for Diagnostic Trouble Codes (DTCs) using an OBD-II scanner
2
Inspect the radiator cap for cracks or damage
3
Perform a pressure test to identify any small leaks or weaknesses
4
Inspect the engine oil for coolant contamination
5
Inspect the coolant for oil contamination
6
Inspect the heater core for leaks

Solution

1. Preparation

Tools Required: OBD-II scanner, pressure tester, socket set, torque wrench, coolant.
Safety Warnings: Allow the engine to cool before starting work on the cooling system.

2. Replace Radiator Cap (if faulty)

Remove the old radiator cap.
Install a new radiator cap that meets OEM specifications.
Ensure it is seated properly to prevent leaks.

3. Repair Cooling System Leaks

If leaks are found:
- Hose Replacement: Disconnect the hoses and replace any that are cracked or worn.
- Radiator Replacement: If the radiator is leaking, remove it by disconnecting hoses and mounting bolts, and install a new one.
If heater core is leaking:
- Drain the coolant from the system.
- Remove the dashboard if necessary to access the heater core.
- Disconnect the heater core hoses and replace the heater core.

4. Replace Blown Head Gasket (if applicable)

Drain the coolant and remove necessary engine components to access the head gasket.
Remove the cylinder head and replace the gasket.
Reassemble the engine, ensuring all bolts are torqued to manufacturer specifications.