why does my Ford Explorer Fifth Generation (2011-2019) make a loud noise when I start it

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

574 words

Problem Statement

Learn how to diagnose and fix loud noise on startup in Ford Explorer 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 oil drain plug or inspecting components

Symptoms

•Loud knocking or grinding noise at startup
•Noise persists for several seconds before quieting down
•Possible check engine light illuminated
•Unusual vibrations felt through the vehicle
•Engine may exhibit rough idle after starting

Diagnostic Steps

1
Scan for error codes using OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the engine oil level and condition; low oil or dirty oil can cause excessive noise
3
Listen for the noise and identify its source (e.g., front of the engine, timing chain area, etc.)
4
Check the battery and starter connections for corrosion or loose connections that might create noise during startup
5
Examine the serpentine belt for wear or damage, which can cause noise if it slips or is misaligned
6
Inspect the exhaust system for leaks or loose components that could create a loud noise during startup

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
•Oil filter wrench
•Torque wrench
•Jack and jack stands

Parts Required

•Engine oil (5W-20 or as specified)
•Oil filter
•Serpentine belt (if needed)
•Exhaust hangers or clamps (if needed)

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the engine oil level and condition; low oil or dirty oil can cause excessive noise
3
Listen for the noise and identify its source (e.g., front of the engine, timing chain area, etc.)
4
Check the battery and starter connections for corrosion or loose connections that might create noise during startup
5
Examine the serpentine belt for wear or damage, which can cause noise if it slips or is misaligned
6
Inspect the exhaust system for leaks or loose components that could create a loud noise during startup

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the battery to ensure safety while working on the vehicle.

2. Engine Oil Check and Change

Check Oil Level: Use the dipstick to check if the oil is at the proper level.
Change Oil if Necessary:
1. Place the vehicle on a flat surface and raise it with jack stands.
2. Remove the oil drain plug using a socket wrench and allow the oil to drain completely into a container.
3. Replace the oil filter using an oil filter wrench.
4. Reinstall the drain plug and torque it to the manufacturer's specification (usually around 20-25 ft-lbs).
5. Refill the engine with the recommended oil type (typically 5W-20 or as specified in the owner's manual).

3. Inspect and Replace Components

Inspect Serpentine Belt:
1. Visually inspect the belt for cracks or glazing.
2. If damaged, remove the belt by releasing tension from the tensioner pulley.
3. Install a new serpentine belt, following the routing diagram usually found on a sticker in the engine bay.
Examine Starter and Battery:
1. Check battery terminals for tightness and corrosion; clean if necessary.
2. Test the starter motor by performing a voltage drop test, replacing it if it fails to meet specifications.

4. Exhaust System Inspection

Inspect Exhaust Components:
1. Look for loose or damaged exhaust hangers and brackets.
2. Tighten any loose bolts or replace damaged components as needed.