why is my Ford Explorer Fifth Generation (2011-2019) making a hissing sound while driving

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

561 words

Problem Statement

Learn to diagnose and fix a hissing sound in your Ford Explorer (2011-2019). 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 systems
•Allow the engine to cool before inspecting the cooling system

Symptoms

•Hissing sound noticeable while driving
•Decreased engine performance
•Possible coolant leak
•Elevated engine temperature
•Unusual smells (e.g., burnt fluid)

Diagnostic Steps

1
Inspect for leaks under the vehicle, particularly coolant or brake fluid
2
Check engine coolant level in the reservoir
3
Examine the serpentine belt for wear or damage
4
Listen for air leaks in the intake manifold or vacuum lines
5
Scan for error codes using an OBD-II scanner
6
Inspect the exhaust system for holes or cracks

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
•Screwdrivers
•Flashlight
•Stethoscope or vacuum hose for listening

Parts Required

•Replacement serpentine belt
•Coolant (specific to Ford specifications)
•Hoses or gaskets (if damaged)

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Diagnostic Steps

1
Inspect for leaks under the vehicle, particularly coolant or brake fluid
2
Check engine coolant level in the reservoir
3
Examine the serpentine belt for wear or damage
4
Listen for air leaks in the intake manifold or vacuum lines
5
Scan for error codes using an OBD-II scanner
6
Inspect the exhaust system for holes or cracks

Solution

1. Preparation

Gather tools and parts needed.
Ensure the vehicle is parked on a flat surface.
Disconnect the battery to prevent electrical issues.

2. Addressing Fluid Leaks

Identify the Source: Use a flashlight to locate the source of the leak.
Repair or Replace: If the coolant leak is from a hose, replace that hose. If it's from the radiator or another component, repair or replace as necessary.
Refill Coolant: After repairs, refill the cooling system with the correct type of coolant as specified in the owner's manual.

3. Replace Serpentine Belt

Remove the Belt: Use a socket wrench to relieve tension on the serpentine belt tensioner and remove the belt.
Install New Belt: Route the new belt according to the belt routing diagram found under the hood.
Reapply Tension: Ensure the tensioner is applying the correct tension to the new belt.

4. Repair Air Leaks

Locate the Leak: If an air leak is detected, replace any damaged vacuum lines or gaskets.
Seal Any Cracks: Use appropriate sealant for cracks found on the intake manifold or hoses.

5. Exhaust System Inspection

Inspect Exhaust Components: Check for any damage to the exhaust pipes, muffler, or catalytic converter.
Weld or Replace Parts: If damage is found, either weld the cracks or replace the affected components.