why is my Ford Explorer Fifth Generation (2011-2019) making a hissing noise

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

598 words

Problem Statement

Learn how to diagnose and fix hissing noise in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic procedures 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 the engine to cool before opening the radiator or coolant system.

Symptoms

•Hissing sound during engine operation or while accelerating
•Loss of power or sluggish acceleration
•Increased engine temperature
•Check engine light illuminated
•Air conditioning not functioning properly

Diagnostic Steps

1
Inspect the engine bay for any visible signs of vacuum leaks or damaged hoses.
2
Use an OBD-II scanner to check for any error codes that may indicate specific issues.
3
Check the condition of the serpentine belt and pulleys for any signs of wear or damage.
4
Inspect the coolant levels and look for signs of leaks in the cooling system.
5
Test the operation of the air conditioning system for unusual noises or inefficiencies.

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
•Smoke machine or spray bottle with soapy water
•Socket set
•Torque wrench
•Coolant pressure tester
•AC gauge set

Parts Required

•Serpentine belt (if damaged)
•Vacuum hoses (if leaks found)
•Coolant (if levels are low)
•AC refrigerant (if needed)

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Diagnostic Steps

1
Inspect the engine bay for any visible signs of vacuum leaks or damaged hoses.
2
Use an OBD-II scanner to check for any error codes that may indicate specific issues.
3
Check the condition of the serpentine belt and pulleys for any signs of wear or damage.
4
Inspect the coolant levels and look for signs of leaks in the cooling system.
5
Test the operation of the air conditioning system for unusual noises or inefficiencies.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to avoid any electrical issues.

2. Inspect for Vacuum Leaks

Tools Required: Smoke machine or spray bottle with soapy water.
Use a smoke machine to introduce smoke into the intake system and look for escaping smoke that indicates leaks. Alternatively, spray soapy water on suspected hoses and connections while the engine is running to see if bubbles form, indicating a leak.
Tighten or replace any leaking hoses or connections as necessary.

3. Check Serpentine Belt and Pulleys

Tools Required: Socket set, torque wrench.
Use a socket set to remove any covers obstructing access to the serpentine belt.
Inspect the belt for cracks, fraying, or glazing.
Check the pulleys for smooth operation and any abnormal noise.
Replace the belt if damaged, ensuring proper tension according to manufacturer specifications.

4. Inspect Cooling System

Tools Required: Coolant pressure tester, wrench set.
Check coolant levels in the reservoir and radiator.
Use a coolant pressure tester to check for leaks in the cooling system.
Inspect hoses and connections for signs of wear or leaks and replace as needed.

5. Examine Air Conditioning System

Tools Required: AC gauge set.
Connect the AC gauge set to the service ports and check for proper refrigerant levels.
Listen for any unusual noises from the AC compressor.
If necessary, recharge the system or repair any identified leaks.