why does my Honda Accord make a knocking noise when accelerating

Honda Accord 10th Generation (2018-2022)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

597 words

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration in Honda Accord. 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.
•Ensure the vehicle is securely supported on jack stands.

Symptoms

•Knocking noise that increases with engine RPM
•Loss of power during acceleration
•Abnormal vibrations felt in the vehicle
•Engine misfiring or rough running
•Check engine light illuminated (if applicable)

Diagnostic Steps

1
Inspect the engine oil level and condition; low or dirty oil can cause knocking.
2
Scan the vehicle's onboard diagnostic system for trouble codes using an OBD-II scanner.
3
Check for any loose or damaged components in the engine and transmission mounts.
4
Inspect the exhaust system for loose parts or leaks that may contribute to noise.
5
Conduct a visual and auditory inspection of the drive belts and pulleys for wear or damage.
6
Test the ignition system components (spark plugs, wires, coils) for proper operation.

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
•Spark plug socket
•Belt tension gauge

Parts Required

•Engine oil
•Oil filter
•Spark plugs
•Engine and transmission mounts (if damaged)
•Drive belts (if worn)

Related Faults

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Diagnostic Steps

1
Inspect the engine oil level and condition; low or dirty oil can cause knocking.
2
Scan the vehicle's onboard diagnostic system for trouble codes using an OBD-II scanner.
3
Check for any loose or damaged components in the engine and transmission mounts.
4
Inspect the exhaust system for loose parts or leaks that may contribute to noise.
5
Conduct a visual and auditory inspection of the drive belts and pulleys for wear or damage.
6
Test the ignition system components (spark plugs, wires, coils) for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the ignition is off.
Disconnect the battery to ensure safety while working on electrical components.

2. Change Engine Oil

Sub-steps:
1. Drain the old engine oil using a socket set to remove the oil pan plug.
2. Replace the oil filter using an oil filter wrench.
3. Refill the engine with the manufacturer-recommended oil type.
Tools Required: Socket set, oil filter wrench, oil catch pan.
Safety Warnings: Allow the engine to cool before handling oil components.

3. Inspect and Replace Spark Plugs

Sub-steps:
1. Remove the ignition coil or wire from each spark plug.
2. Use a spark plug socket to remove old plugs and inspect for wear.
3. Install new spark plugs, ensuring they are gapped correctly according to manufacturer specifications.
Tools Required: Spark plug socket, torque wrench.
Safety Warnings: Use gloves to protect hands from debris.

4. Check Engine and Transmission Mounts

Sub-steps:
1. Visually inspect engine and transmission mounts for cracks or deterioration.
2. Use a torque wrench to ensure all mounting bolts are tightened to specifications.
3. Replace any damaged mounts with OEM parts.
Tools Required: Torque wrench, socket set.
Safety Warnings: Ensure the vehicle is securely supported on jack stands.

5. Inspect Drive Belts and Pulleys

Sub-steps:
1. Visually inspect drive belts for fraying or cracks.
2. Check pulleys for alignment and wear; replace any damaged parts.
3. Adjust or replace belts as necessary.
Tools Required: Belt tension gauge, socket set.
Safety Warnings: Disconnect the battery before working on electrical components.