my Toyota Corolla E170 (2013-2019) makes a knocking noise when I accelerate what's wrong

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

645 words

Problem Statement

Diagnose and fix knocking noise during acceleration in 2013-2019 Toyota Corolla E170. Step-by-step guide with symptoms, diagnostics, and repairs.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is on a flat surface and secure it with wheel chocks
•Disconnect the battery when working on electrical components

Symptoms

•Knocking noise when accelerating
•Loss of power during acceleration
•Vibrations felt in the steering wheel or chassis
•Check engine light may be illuminated
•Increased fuel consumption

Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect engine mounts for wear or damage
3
Examine the exhaust system and heat shields for loose or damaged parts
4
Check the condition and tension of the timing chain or belt
5
Inspect the transmission for low fluid levels or abnormal noises
6
Check suspension parts like struts and bushings for 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
•Jack and jack stands
•Torque wrench
•Inspection mirror

Parts Required

•Engine mounts (if damaged)
•Exhaust hangers or heat shields (if loose or damaged)
•Timing chain/belt (if worn)

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect engine mounts for wear or damage
3
Examine the exhaust system and heat shields for loose or damaged parts
4
Check the condition and tension of the timing chain or belt
5
Inspect the transmission for low fluid levels or abnormal noises
6
Check suspension parts like struts and bushings for wear

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, jack and jack stands, torque wrench, inspection mirror.
Safety Warnings: Ensure the vehicle is on a flat surface and secure it with wheel chocks. Disconnect the battery when working on electrical components.

2. Address Engine Mount Issues

Raise the Vehicle: Use a jack to lift the front of the vehicle and secure it with jack stands.
Inspect Engine Mounts: Examine all engine mounts for cracks or wear.
- If damaged: Remove the bolts securing the engine mount to the engine and subframe.
- Replace with new engine mounts and torque the bolts to the manufacturer’s specifications (typically 40-60 ft-lbs).

3. Tighten or Replace Loose Components

Inspect Exhaust System: Check all bolts and hangers for tightness.
- If loose, tighten them with a socket set.
- If damaged, replace the affected parts (e.g., heat shields, exhaust hangers).

4. Check Timing Chain/Belt

Remove Access Covers: If necessary, remove the engine cover and timing belt/chain cover.
Inspect Timing Components: Check for proper tension and signs of wear.
- If worn, replace the timing chain or belt according to manufacturer specifications, usually requiring replacement every 60,000-100,000 miles.

5. Examine Transmission Fluid

Check Fluid Level: With the engine running, check the transmission fluid level using the dipstick.
- If low, add the correct type of transmission fluid (typically Toyota ATF WS).
- If dirty or burnt, consider a transmission fluid change.

6. Suspension Inspection

Inspect Suspension Components: Look for wear in the struts, bushings, and control arms.
- If worn, replace the affected components, ensuring all bolts are torqued to specifications.