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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

549 words

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration in Ford Explorer Fifth Generation. 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 performing any maintenance.

Symptoms

•Knocking or tapping noise during acceleration
•Loss of power or sluggish performance
•Engine misfire or rough running
•Unusual vibrations felt through the cabin
•Decreased fuel efficiency

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any underlying engine issues.
2
Check the engine oil level and condition; low or dirty oil can cause knocking noises.
3
Inspect the engine mounts for wear or damage, as worn mounts can transmit engine noise.
4
Examine the exhaust system for loose components or leaks that may contribute to noise.
5
Perform a visual inspection of the drive belts and pulleys for wear or misalignment.
6
Test the ignition system components, including spark plugs and coils, for proper function.

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 filter wrench
•Jack and jack stands

Parts Required

•Engine oil (5W-20 or as specified)
•Oil filter
•Engine mounts (if damaged)
•Spark plugs (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any underlying engine issues.
2
Check the engine oil level and condition; low or dirty oil can cause knocking noises.
3
Inspect the engine mounts for wear or damage, as worn mounts can transmit engine noise.
4
Examine the exhaust system for loose components or leaks that may contribute to noise.
5
Perform a visual inspection of the drive belts and pulleys for wear or misalignment.
6
Test the ignition system components, including spark plugs and coils, for proper function.

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 ensure safety.

2. Change Engine Oil

Sub-steps:
1. Remove the drain plug and allow the old oil to drain completely into a pan.
2. Replace the oil filter using an oil filter wrench.
3. Reinstall the drain plug and tighten to manufacturer specifications (typically 20-25 ft-lbs).
4. Refill the engine with the appropriate oil type (5W-20 or as specified in the owner's manual).
5. Start the engine and let it run for a few minutes, then check for leaks.

3. Inspect and Replace Engine Mounts

Tools Required:
- Socket set
- Torque wrench
Sub-steps:
1. Lift the vehicle securely on jack stands.
2. Remove the bolts securing the engine mounts to the engine and frame.
3. Carefully lift the engine slightly using a jack to relieve pressure on the mounts.
4. Replace any worn or damaged mounts with new ones, tightening bolts to manufacturer specifications.
5. Lower the engine and recheck for stability.

4. Inspect Ignition System

Sub-steps:
1. Remove the ignition coil packs and inspect for signs of wear or damage.
2. Replace any faulty spark plugs with new ones, ensuring they are gapped correctly (typically 0.054 inches).
3. Reinstall the ignition coils and ensure all connections are secure.