why does my Toyota Corolla E170 (2013-2019) make a loud knocking sound

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

558 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Diagnose and fix the loud knocking sound in your 2013-2019 Toyota Corolla E170. Step-by-step guide with symptoms, diagnostic steps, 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 components.
•Allow engine to cool before opening the oil drain plug.

Symptoms

•Loud knocking sound, especially during acceleration or when the engine is under load
•Possible loss of power while driving
•Engine misfire or rough idle
•Unusual vibrations felt through the steering wheel or chassis
•Check Engine light illuminated (if applicable)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the engine oil level and condition; low or dirty oil can cause knocking sounds.
3
Check for loose or damaged engine mounts by visually inspecting them and performing a physical inspection.
4
Listen for the source of the knocking using a mechanic's stethoscope or by carefully using a long screwdriver against the engine block.
5
Inspect the timing chain/belt for wear or misalignment, especially if the noise is coming from the front of the engine.
6
Examine the spark plugs and ignition system for any signs of misfiring or abnormal wear.

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
•Mechanic's stethoscope
•Torque wrench
•Oil filter wrench
•Jack and jack stands

Parts Required

•Engine oil (0W-20)
•Oil filter
•Engine mounts (if required)
•Timing chain/belt (if required)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the engine oil level and condition; low or dirty oil can cause knocking sounds.
3
Check for loose or damaged engine mounts by visually inspecting them and performing a physical inspection.
4
Listen for the source of the knocking using a mechanic's stethoscope or by carefully using a long screwdriver against the engine block.
5
Inspect the timing chain/belt for wear or misalignment, especially if the noise is coming from the front of the engine.
6
Examine the spark plugs and ignition system for any signs of misfiring or abnormal wear.

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, mechanic's stethoscope, torque wrench.
Ensure the vehicle is on a flat surface and the engine is cool.
Safety Warning: Disconnect the battery before working on electrical components.

2. Change Engine Oil

Sub-steps:
1. Lift the vehicle using a jack and secure it with jack stands.
2. Remove the drain plug using a socket wrench and allow old oil to drain into a pan.
3. Replace the oil filter using an oil filter wrench.
4. Reinstall the drain plug and torque it to the manufacturer's specification (typically around 20-30 ft-lbs).
5. Refill the engine with new oil, ensuring it meets the manufacturer’s specifications (typically 0W-20 for Corolla).
6. Start the engine and check for leaks.

3. Inspect and Replace Engine Mounts (if necessary)

Sub-steps:
1. Identify the engine mounts and visually inspect for cracks or excessive wear.
2. Use a socket set to remove the bolts securing the engine mounts.
3. Replace damaged mounts with new OEM parts.
4. Torque the new mounts to specified values as per the service manual.

4. Check and Adjust Timing Chain/Belt

Sub-steps:
1. Remove any necessary covers to access the timing chain/belt.
2. Inspect the chain/belt for wear, tension, or misalignment.
3. Adjust the tensioner or replace the timing chain/belt if wear is detected.
4. Reinstall covers and ensure everything is secure.