why does my Ford Explorer Fifth Generation (2011-2019) make a knocking noise when accelerating

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

546 words

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration 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 any components.

Symptoms

•Knocking noise when accelerating
•Vibration felt through the vehicle
•Loss of power during acceleration
•Engine check light illuminated (possible)
•Unusual engine sounds at idle (possible)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the engine oil level and condition; low or contaminated oil can cause knocking.
3
Check for any loose or damaged components in the engine bay, including mounts and brackets.
4
Inspect the exhaust system for loose or damaged parts that may cause noise.
5
Test drive the vehicle to replicate the noise and identify the specific conditions under which it occurs.
6
Listen for the knocking noise while performing a visual inspection of the drive belts and pulleys.

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
•Torque wrench
•Oil catch pan
•Screwdriver set

Parts Required

•Engine oil
•Oil filter
•Engine mounts (if damaged)
•Drive belts (if worn)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the engine oil level and condition; low or contaminated oil can cause knocking.
3
Check for any loose or damaged components in the engine bay, including mounts and brackets.
4
Inspect the exhaust system for loose or damaged parts that may cause noise.
5
Test drive the vehicle to replicate the noise and identify the specific conditions under which it occurs.
6
Listen for the knocking noise while performing a visual inspection of the drive belts and pulleys.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to ensure safety.

2. Inspect and Tighten Engine Mounts

Locate the engine mounts and visually inspect for damage or wear.
Use a socket set to tighten any loose bolts on the engine mounts to the manufacturer’s torque specifications.
If any mounts are damaged, replace them with new units.

3. Oil Change (if oil condition is poor)

Place an oil catch pan under the engine.
Remove the oil drain plug using a socket wrench and let the old oil drain completely.
Replace the oil drain plug and torque it to the manufacturer’s specifications.
Replace the oil filter with a new one, ensuring it’s tightened properly.
Fill the engine with the appropriate type and amount of new engine oil as per manufacturer recommendation.

4. Inspect and Replace Worn Components

Inspect the drive belts and pulleys for wear; replace any that show signs of damage.
- For belt replacement: Loosen the tensioner and remove the old belt; install the new belt and adjust tension.
Check the exhaust system for loose hangers or damaged sections; repair or replace as necessary.

5. Road Test

Reconnect the battery.
Start the engine and allow it to reach operating temperature.
Take the vehicle for a test drive to ensure the knocking noise has been resolved.