my Ford Explorer Fifth Generation (2011-2019) is making a hissing sound, what’s happening

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

524 words

Problem Statement

Learn how to diagnose and fix a hissing sound in your Ford Explorer Fifth Generation (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

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before inspecting the cooling system.

Symptoms

•Hissing sound when the engine is running
•Possible decrease in engine performance
•Overheating of the engine
•Check engine light may illuminate
•Unusual changes in idle speed

Diagnostic Steps

1
Inspect under the hood for any obvious signs of leaks or damaged hoses.
2
Use an OBD-II scanner to check for any error codes related to the engine or cooling system.
3
Check coolant levels in the reservoir and radiator for any drop.
4
Listen closely to identify the source of the hissing sound (e.g., near the intake manifold, hoses).
5
Inspect the vacuum lines for any cracks or disconnections.
6
Examine the serpentine belt and pulleys for wear and proper tension.

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
•Pliers
•Screwdriver
•Socket set
•Torque wrench
•Hose cutter

Parts Required

•Replacement hoses
•Replacement vacuum lines
•Serpentine belt (if necessary)

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Diagnostic Steps

1
Inspect under the hood for any obvious signs of leaks or damaged hoses.
2
Use an OBD-II scanner to check for any error codes related to the engine or cooling system.
3
Check coolant levels in the reservoir and radiator for any drop.
4
Listen closely to identify the source of the hissing sound (e.g., near the intake manifold, hoses).
5
Inspect the vacuum lines for any cracks or disconnections.
6
Examine the serpentine belt and pulleys for wear and proper tension.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to prevent any electrical shorts.
Ensure the vehicle is on a flat surface and secure with wheel chocks.

2. Inspect and Replace Damaged Hoses

Tools Required: Pliers, hose clamps, screwdriver.
Locate any damaged or cracked hoses identified during the diagnostic steps.
Use pliers or a screwdriver to loosen and remove the damaged hose.
Measure the length of the old hose and cut a new hose to match.
Install the new hose and secure with hose clamps.

3. Repair or Replace Vacuum Lines

Tools Required: Pliers, hose cutter.
Identify any defective vacuum lines by visual inspection.
Remove the damaged vacuum line by loosening any clamps.
Cut a new vacuum line to the proper length and install it in place of the old one.
Ensure all connections are tight and secure.

4. Check and Replace Serpentine Belt (if required)

Tools Required: Socket set, torque wrench.
Inspect the serpentine belt for cracks, fraying, or signs of wear.
If necessary, loosen the tensioner using a socket.
Remove the old belt and route the new belt according to the belt routing diagram.
Tighten the tensioner and ensure proper tension on the new belt.