my Ford Explorer Fifth Generation (2011-2019) is leaking coolant, what should I check?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

667 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 Ford Explorer 2011-2019. 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 to prevent burns.
•Ensure the vehicle is on a flat, stable surface and secure with wheel chocks.

Symptoms

•Coolant puddles under the vehicle
•Engine overheating
•Fluctuating temperature gauge
•Sweet smell of coolant inside or outside the vehicle
•Low coolant level warning light illuminated
•Steam rising from the engine bay

Diagnostic Steps

1
Inspect the ground under the vehicle for coolant puddles and determine the location of the leak.
2
Check the coolant reservoir for cracks or leaks.
3
Examine the radiator for signs of damage, corrosion, or leaking at the seams.
4
Inspect all hoses connected to the cooling system for cracks, soft spots, or loose connections.
5
Look at the water pump for signs of leakage or corrosion.
6
Check the thermostat housing and gasket for signs of coolant seepage.
7
Use a pressure tester to pressurize the cooling system and identify the source of the leak.

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

•Socket set
•Screwdrivers
•Torque wrench
•Pressure tester
•Drain pan

Parts Required

•New radiator (if applicable)
•Replacement hoses (as needed)
•Water pump (if applicable)
•Thermostat and gasket (if applicable)

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Diagnostic Steps

1
Inspect the ground under the vehicle for coolant puddles and determine the location of the leak.
2
Check the coolant reservoir for cracks or leaks.
3
Examine the radiator for signs of damage, corrosion, or leaking at the seams.
4
Inspect all hoses connected to the cooling system for cracks, soft spots, or loose connections.
5
Look at the water pump for signs of leakage or corrosion.
6
Check the thermostat housing and gasket for signs of coolant seepage.
7
Use a pressure tester to pressurize the cooling system and identify the source of the leak.

Solution

1. Preparation

Gather tools and safety equipment.
Tools Required:
- Socket set
- Screwdrivers
- Torque wrench
- Pressure tester
- Drain pan
Safety Warnings:
- Allow the engine to cool before starting work to prevent burns.
- Ensure the vehicle is on a flat, stable surface and secure with wheel chocks.

2. Locate the Leak

Use the pressure tester to pressurize the cooling system.
Inspect the system while under pressure to identify where coolant is escaping.
Mark the leak source for repair.

3. Replace Damaged Components

3.1 Radiator Replacement (if leaking)

Remove the front grill and any components obstructing the radiator.
Disconnect the upper and lower radiator hoses using the socket set.
Remove the radiator mounting bolts and lift the radiator out.
Install the new radiator in reverse order:
- Ensure proper alignment.
- Tighten mounting bolts to manufacturer specifications (typically 15-20 ft-lbs).

3.2 Hose Replacement (if damaged)

Identify the damaged hose and loosen the clamps using the screwdriver.
Remove the hose and replace it with a new one.
Tighten the clamps securely.

3.3 Water Pump Replacement (if leaking)

Drain the coolant into a pan.
Remove the serpentine belt from the water pump.
Disconnect the water pump hoses and mounting bolts.
Install the new water pump:
- Apply a new gasket or sealant as required.
- Torque bolts to manufacturer specifications (usually around 10-15 ft-lbs).

3.4 Thermostat Housing Replacement (if leaking)

Drain coolant to a level below the thermostat housing.
Remove the housing bolts and detach the housing.
Replace the gasket and install the new or cleaned housing.
Torque bolts to specifications (typically around 10-12 ft-lbs).

4. Refill and Bleed the Cooling System

Refill the cooling system with the appropriate coolant mixture (50/50 mix of coolant and distilled water).
Start the engine and let it run with the radiator cap off to bleed air from the system.
Monitor the temperature gauge and check for leaks.