why does my Ford Explorer 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

572 words

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration in Ford Explorer. 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

•Always allow the engine to cool before working on it.
•Disconnect the battery before handling electrical components.

Symptoms

•Knocking noise during acceleration
•Possible vibrations felt through the steering wheel or chassis
•Decreased engine performance or power loss
•Check engine light illuminated (if applicable)
•Unusual exhaust noise or increased emissions

Diagnostic Steps

1
Inspect the engine oil level and condition to rule out low oil or dirty oil.
2
Use an OBD-II scanner to check for any stored error codes that could indicate engine issues.
3
Visually inspect the engine mounts for signs of wear or damage.
4
Examine the drive belts for cracks, fraying, or looseness.
5
Check the condition of the spark plugs and ignition coils for misfiring issues.
6
Listen for the noise while the vehicle is stationary in gear to determine if it is engine or drivetrain related.

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 dipstick
•Spark plug socket
•Belt tensioner tool

Parts Required

•Engine oil
•Oil filter
•Engine mounts (if damaged)
•Drive belts (if worn)
•Spark plugs
•Ignition coils (if faulty)

Related Faults

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Diagnostic Steps

1
Inspect the engine oil level and condition to rule out low oil or dirty oil.
2
Use an OBD-II scanner to check for any stored error codes that could indicate engine issues.
3
Visually inspect the engine mounts for signs of wear or damage.
4
Examine the drive belts for cracks, fraying, or looseness.
5
Check the condition of the spark plugs and ignition coils for misfiring issues.
6
Listen for the noise while the vehicle is stationary in gear to determine if it is engine or drivetrain related.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the ignition is off.

2. Check Engine Oil

Tools Required: Oil dipstick, oil container
Remove the oil dipstick and check the oil level. If low, add the manufacturer-recommended oil type until it reaches the full mark.
If oil is dirty, proceed to change the oil and filter.

3. Replace Worn Engine Mounts (if applicable)

Tools Required: Socket set, torque wrench, pry bar
Loosen the bolts securing the engine mounts using a socket set.
Use a pry bar to carefully lift the engine slightly to relieve pressure on the mounts.
Remove the old mounts and install new mounts, tightening to the manufacturer's specified torque.

4. Inspect and Replace Drive Belts (if needed)

Tools Required: Socket set, belt tensioner tool
Release tension from the drive belt using the tensioner tool.
Remove the old belt and inspect for wear. Replace with a new belt if signs of damage are present.
Reapply tension to the new belt and ensure proper alignment.

5. Replace Spark Plugs and Ignition Coils (if necessary)

Tools Required: Spark plug socket, torque wrench, ratchet
Remove the ignition coils by unbolting them from the engine.
Disconnect the electrical connectors and remove the spark plugs using a spark plug socket.
Install new spark plugs, ensuring they are gapped correctly according to specifications.
Reinstall the ignition coils and secure them with bolts.