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

547 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 cooling system.

Symptoms

•Hissing noise audible during engine operation
•Possible loss of power or acceleration
•Engine overheating
•Check engine light illuminated
•Unusual changes in engine performance
•Increased fuel consumption

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related issues.
2
Inspect for vacuum leaks by visually checking hoses and connections for cracks or disconnections.
3
Check the coolant level and inspect for any signs of leaks that could contribute to hissing sounds.
4
Listen closely to pinpoint the source of the hissing noise (e.g., intake, exhaust, or coolant system).
5
Test the operation of the PCV valve to ensure it is functioning properly and not causing excessive hissing.
6
Examine the brake booster for any signs of failure that could cause hissing noises.

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
•Pliers
•Smoke machine
•Carburetor cleaner
•Coolant
•Hose clamps
•Funnel

Parts Required

•Vacuum hoses (as needed)
•PCV valve (if replacement is necessary)
•Coolant (as required)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related issues.
2
Inspect for vacuum leaks by visually checking hoses and connections for cracks or disconnections.
3
Check the coolant level and inspect for any signs of leaks that could contribute to hissing sounds.
4
Listen closely to pinpoint the source of the hissing noise (e.g., intake, exhaust, or coolant system).
5
Test the operation of the PCV valve to ensure it is functioning properly and not causing excessive hissing.
6
Examine the brake booster for any signs of failure that could cause hissing noises.

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery for safety.

2. Inspect and Repair Vacuum Leaks

Sub-step 1: Visually inspect all vacuum hoses for damage. Replace any cracked or broken hoses.
Sub-step 2: Use a smoke machine or carburetor cleaner to find hard-to-detect leaks. Apply the cleaner around suspected areas and observe for changes in engine RPM.
Tools Required: Smoke machine, carburetor cleaner, hose clamps.

3. Check and Replace the PCV Valve (if necessary)

Sub-step 1: Locate the PCV valve, typically found on the valve cover or intake manifold.
Sub-step 2: Remove the PCV valve and inspect it for blockages or damage.
Sub-step 3: If defective, replace with a new PCV valve, ensuring a secure fit.
Tools Required: Socket set, pliers.

4. Inspect and Repair Coolant System

Sub-step 1: Check the coolant reservoir for proper levels and inspect hoses for leaks.
Sub-step 2: Replace any damaged hoses, ensuring that all connections are tight.
Sub-step 3: If coolant leaks are detected, use appropriate coolant type to refill the system.
Tools Required: Coolant, funnel.

5. Inspect Brake Booster

Sub-step 1: Locate the brake booster and inspect for any signs of wear or damage.
Sub-step 2: Test the brake booster by pressing the brake pedal; if the hissing persists, consider replacing the booster.
Tools Required: Socket set.