why does my Ford Explorer Fifth Generation (2011-2019) make a hissing sound?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

491 words

Problem Statement

Learn how 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

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems
•Allow engine to cool before opening the radiator

Symptoms

•Hissing sound coming from the engine bay or under the vehicle
•Possible loss of power during acceleration
•Decreased fuel efficiency
•Check engine light illuminated (may or may not be present)
•Fluid leaks visible under the vehicle
•Overheating engine warning

Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect for vacuum leaks by visually checking hoses and connections
3
Check fluid levels to ensure engine oil, coolant, and transmission fluid are within specifications
4
Examine exhaust system for any signs of leaks or damage
5
Listen for the source of noise using a mechanic's stethoscope
6
Perform a cooling system pressure test to detect any leaks in the radiator or hoses

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
•Vacuum gauge
•Mechanic's stethoscope
•Safety goggles
•Gloves
•Socket set
•Torque wrench

Parts Required

•Vacuum hoses
•Exhaust gaskets or pipes (if damaged)
•Coolant

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect for vacuum leaks by visually checking hoses and connections
3
Check fluid levels to ensure engine oil, coolant, and transmission fluid are within specifications
4
Examine exhaust system for any signs of leaks or damage
5
Listen for the source of noise using a mechanic's stethoscope
6
Perform a cooling system pressure test to detect any leaks in the radiator or hoses

Solution

1. Preparation

Tools Required: OBD-II scanner, vacuum gauge, mechanic's stethoscope, safety goggles, gloves.
Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Addressing Vacuum Leaks

Inspect and Replace Hoses:
- Check all vacuum hoses for cracks or holes.
- If damaged, remove the old hoses and replace them with new ones. Ensure they are properly connected.

3. Repairing Exhaust Leaks

Inspect and Fix Exhaust Components:
- Locate any leaks in the exhaust manifold or pipes.
- If a leak is found, either tighten the connections or replace damaged components as needed.

4. Cooling System Maintenance

Fix Leaks in Cooling System:
- If the pressure test indicates leaks, replace any faulty hoses, clamps, or the radiator as necessary.
- Refill the cooling system with the appropriate type of coolant as specified in the owner's manual.

5. Final Assembly and Cleanup

Reassemble All Components:
- Ensure all components and hoses are secured and properly positioned.
- Remove any tools and debris from the engine bay.