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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

476 words

Problem Statement

Learn how to diagnose and fix the 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 battery before working on electrical systems.
•Allow the engine to cool before opening the radiator or working on the cooling system.

Symptoms

•Hissing noise when the engine is running
•Increase in engine temperature
•Check engine light illuminated
•Fluid leaks under the vehicle
•Loss of power when accelerating

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential engine faults.
2
Inspect the engine bay for any visible signs of leaks or damaged vacuum hoses.
3
Listen closely to pinpoint the location of the hissing noise.
4
Check the coolant levels and inspect for any signs of overheating.
5
Examine the intake manifold and throttle body for any leaks.
6
Perform a pressure test on the cooling system to check 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
•Cooling system pressure tester
•Pliers
•Socket set
•Throttle body cleaner

Parts Required

•Vacuum hoses
•Coolant
•Throttle body cleaner

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential engine faults.
2
Inspect the engine bay for any visible signs of leaks or damaged vacuum hoses.
3
Listen closely to pinpoint the location of the hissing noise.
4
Check the coolant levels and inspect for any signs of overheating.
5
Examine the intake manifold and throttle body for any leaks.
6
Perform a pressure test on the cooling system to check for leaks.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Vacuum Hoses

Sub-steps:
1. Locate all vacuum hoses connected to the intake manifold.
2. Visually inspect each hose for cracks, wear, or disconnections.
3. If damaged, remove the old hoses using pliers and replace them with new vacuum hoses.

Tools Required: Pliers, socket set
Parts Required: Vacuum hoses

3. Check and Repair Cooling System

Sub-steps:
1. Refill the coolant system with the appropriate coolant type specified in the owner’s manual.
2. Use a cooling system pressure tester to check for leaks.
3. If leaks are found at the radiator or hoses, replace the defective components.

Tools Required: Cooling system pressure tester
Parts Required: Coolant, radiator, hoses (if necessary)

4. Inspect and Clean Throttle Body

Sub-steps:
1. Remove the air intake duct to access the throttle body.
2. Clean the throttle body using throttle body cleaner and a soft cloth.
3. Reinstall the air intake duct and ensure all connections are secure.

Tools Required: Throttle body cleaner, soft cloth, socket set
Parts Required: Throttle body cleaner