why is my Ford Explorer making a knocking noise when accelerating

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

558 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

•Disconnect the battery before working on electrical systems.
•Allow engine to cool before opening any components.

Symptoms

•Knocking noise when accelerating
•Possible loss of power during acceleration
•Engine misfire or rough running
•Vibration felt through the chassis
•Check engine light illuminated (if applicable)

Diagnostic Steps

1
Inspect the engine oil level and condition to ensure proper lubrication.
2
Scan the vehicle’s onboard computer for any diagnostic trouble codes (DTCs) using an OBD-II scanner.
3
Check for any loose or damaged engine mounts that could contribute to noise.
4
Inspect the exhaust system for loose components or leaks that may cause knocking sounds.
5
Perform a visual inspection of the drive belts and pulleys for wear or looseness.
6
Check the condition of the spark plugs and ignition system components.

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
•Wrench set
•Torque wrench
•Oil dipstick

Parts Required

•Engine oil
•Oil filter
•Spark plugs
•Engine mounts (if damaged)
•Exhaust components (if damaged)

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Diagnostic Steps

1
Inspect the engine oil level and condition to ensure proper lubrication.
2
Scan the vehicle’s onboard computer for any diagnostic trouble codes (DTCs) using an OBD-II scanner.
3
Check for any loose or damaged engine mounts that could contribute to noise.
4
Inspect the exhaust system for loose components or leaks that may cause knocking sounds.
5
Perform a visual inspection of the drive belts and pulleys for wear or looseness.
6
Check the condition of the spark plugs and ignition system components.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery before beginning work to ensure safety.
Allow the engine to cool if it has been running.

2. Engine Oil Check

Remove the dipstick and wipe it clean.
Reinsert the dipstick and remove it again to check the oil level.
- Tools Required: Oil dipstick
If the oil is low or dirty, change the engine oil and filter.
- Sub-steps:
  1. Drain old oil using a wrench to remove the oil pan bolt.
  2. Replace the oil filter with a new one.
  3. Refill with manufacturer-recommended oil type and quantity.

3. Inspect Engine Mounts

Visually inspect engine mounts for any signs of wear or damage.
If mounts are damaged, use a socket set to replace them.
- Sub-steps:
  1. Support the engine with a jack.
  2. Remove the bolts securing the damaged mount.
  3. Install the new mount and torque to manufacturer specifications.

4. Exhaust System Inspection

Examine the exhaust system for loose brackets or damaged components.
Tighten any loose connections or replace damaged parts as necessary.
- Tools Required: Wrench set
- Sub-steps:
  1. Check all exhaust hangers and brackets for integrity.
  2. Use a wrench to tighten any loose bolts or nuts.

5. Spark Plug and Ignition System Check

Remove spark plugs and inspect for wear or carbon buildup.
Replace spark plugs if necessary.
- Tools Required: Socket set, torque wrench
- Sub-steps:
  1. Remove ignition coils (if applicable) to access spark plugs.
  2. Replace spark plugs and torque to manufacturer specifications.