why does my Honda Accord make a knocking noise when accelerating

Honda Accord Eleventh Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

582 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 beginning work on any components

Symptoms

•Knocking noise increases with engine RPM
•Poor acceleration performance
•Unusual vibrations felt through the vehicle
•Possible check engine light illuminated
•Increased engine temperature

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored diagnostic trouble codes (DTCs)
2
Inspect engine oil level and condition
3
Check for loose or damaged engine mounts
4
Examine the exhaust system for loose components or leaks
5
Listen to the engine while idling to determine if the noise originates from a specific component
6
Inspect the intake and fuel system for any irregularities

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)
•Oil filter
•Engine mounts (if needed)
•Exhaust components (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored diagnostic trouble codes (DTCs)
2
Inspect engine oil level and condition
3
Check for loose or damaged engine mounts
4
Examine the exhaust system for loose components or leaks
5
Listen to the engine while idling to determine if the noise originates from a specific component
6
Inspect the intake and fuel system for any irregularities

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to prevent electrical shorts.

2. Engine Oil Change

Sub-step 1: Remove the oil drain plug using a socket wrench and drain the old oil into a suitable container.
Sub-step 2: Replace the oil filter using an oil filter wrench, applying a thin layer of new oil to the gasket before installing.
Sub-step 3: Replace the drain plug and tighten to the manufacturer's specifications (typically around 20-25 ft-lbs).
Sub-step 4: Fill the engine with the recommended type and amount of oil (usually 5W-20 for Honda Accord).

3. Inspect and Replace Engine Mounts

Sub-step 1: Use a jack to lift the engine slightly for support.
Sub-step 2: Locate and inspect engine mounts for wear or damage.
Sub-step 3: Remove the bolts securing the damaged engine mount using a socket set.
Sub-step 4: Install the new engine mount and tighten bolts to the manufacturer’s torque specifications.
Sub-step 5: Carefully lower the engine and remove the jack.

4. Exhaust System Inspection and Repair

Sub-step 1: Inspect the entire exhaust system for loose bolts, damaged hangers, or rusted sections.
Sub-step 2: Tighten any loose bolts or hangers.
Sub-step 3: If any components are damaged, replace them with OEM or quality aftermarket parts.