why does my Toyota Corolla E170 (2013-2019) make a knocking noise when starting?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

562 words

Problem Statement

Diagnose and fix knocking noise during engine start 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 systems
•Allow the engine to cool completely before performing any inspections or repairs

Symptoms

•Knocking noise during engine start
•Possible engine stalling upon ignition
•Check engine light illuminated
•Rough idle immediately after starting
•Reduced engine performance or power

Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect battery voltage and connections for corrosion or looseness
3
Verify that the engine oil level is adequate and in good condition
4
Examine the starter motor for wear or damage
5
Inspect the engine mounts for wear or damage
6
Use a mechanic's stethoscope to isolate the source of the knocking noise

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
•Wrench set
•Wire brush
•Multimeter
•Socket set
•Oil filter wrench
•Oil catch pan
•Funnel
•Jack and jack stands

Parts Required

•Engine oil
•Oil filter
•Starter motor (if defective)
•Engine mounts (if worn)

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect battery voltage and connections for corrosion or looseness
3
Verify that the engine oil level is adequate and in good condition
4
Examine the starter motor for wear or damage
5
Inspect the engine mounts for wear or damage
6
Use a mechanic's stethoscope to isolate the source of the knocking noise

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and secured with wheel chocks.
Disconnect the battery to prevent electrical shock.

2. Battery and Connections Inspection

Tools Required: Wrench set, wire brush, multimeter
Inspect battery terminals for corrosion; clean with a wire brush if necessary.
Tighten any loose connections to ensure good contact.

3. Engine Oil Change (if needed)

Tools Required: Socket set, oil filter wrench, oil catch pan, funnel
Drain the engine oil using the oil catch pan.
Replace the oil filter with a new one.
Refill with the manufacturer-recommended engine oil (usually 0W-20 for Toyota Corolla).

4. Starter Motor Inspection

Tools Required: Socket set, multimeter
Remove the starter motor from the engine.
Test the starter motor with a multimeter to ensure it is functioning properly.
If faulty, replace with a new starter motor following manufacturer's specifications.

5. Engine Mount Replacement (if necessary)

Tools Required: Jack and jack stands, socket set
Raise the vehicle and support it securely on jack stands.
Locate the engine mounts and examine for cracks or wear.
Replace with new engine mounts by removing the old ones and securing the new mounts to manufacturer specifications.