why does my Toyota Corolla E170 (2013-2019) have a knocking sound when accelerating?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

464 words

Problem Statement

Learn how to diagnose and fix knocking sound during acceleration in Toyota Corolla E170 (2013-2019). 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 components.
•Allow the engine to cool before inspecting engine mounts and components.

Symptoms

•Knocking noise that increases with acceleration
•Vibration felt through the steering wheel or floor
•Loss of power during acceleration
•Unusual engine sounds when under load
•Possible check engine light illuminated

Diagnostic Steps

1
Inspect the engine mounts for wear or damage.
2
Check the condition of the transmission mount.
3
Scan the vehicle with an OBD-II scanner for any error codes.
4
Examine the drive belt and pulleys for wear or misalignment.
5
Inspect the exhaust system for loose components or leaks.
6
Conduct a visual inspection of the suspension 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
•Torque wrench
•Wrench set
•Jack stands
•Flashlight

Parts Required

•Engine mounts (if damaged)
•Transmission mount (if damaged)
•Drive belt (if worn)

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Diagnostic Steps

1
Inspect the engine mounts for wear or damage.
2
Check the condition of the transmission mount.
3
Scan the vehicle with an OBD-II scanner for any error codes.
4
Examine the drive belt and pulleys for wear or misalignment.
5
Inspect the exhaust system for loose components or leaks.
6
Conduct a visual inspection of the suspension components.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the battery (negative terminal).

2. Inspect Engine and Transmission Mounts

Tools Required: Socket set, torque wrench.
Sub-steps:
1. Remove any covers obstructing access to engine and transmission mounts.
2. Visually inspect mounts for cracks or wear.
3. Use a torque wrench to check the mounting bolts for proper torque; retighten if needed, using manufacturer specifications.

3. Check Drive Belt and Pulleys

Tools Required: Wrench set, flashlight.
Sub-steps:
1. Inspect the drive belt for signs of fraying or glazing.
2. Check the pulleys for any wobble or misalignment.
3. Replace the drive belt if damaged or worn.

4. Repair or Replace Components

If damaged engine or transmission mounts are found, replace them using:
- Tools Required: Jack stands, socket set.
- Sub-steps:
  1. Raise the vehicle using jack stands.
  2. Remove the bolts securing the damaged mount.
  3. Install the new mount and torque to manufacturer specifications.

5. Reassemble and Test

Tools Required: None additional.
Sub-steps:
1. Reinstall any covers removed during inspection.
2. Reconnect the battery.
3. Start the engine and check for any abnormal noises.