how to replace the spark plugs on my Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

558 words

Problem Statement

Step-by-step guide to replace spark plugs on Toyota Corolla E170 (2013-2019). Learn symptoms, diagnostic steps, and tools required for a successful repair.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before accessing spark plugs.

Symptoms

•Rough idle
•Engine misfires
•Decreased fuel efficiency
•Difficulty starting the engine
•Check engine light illuminated

Diagnostic Steps

1
Inspect the spark plugs for wear or damage.
2
Scan for error codes using an OBD-II scanner to check for misfire codes.
3
Check the ignition coils for proper operation if misfires are detected.
4
Verify the spark plug gap with a feeler gauge.
5
Inspect the ignition wires or boots for signs of 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

•Socket set
•Torque wrench
•Spark plug socket
•Ratchet
•Feeler gauge
•Anti-seize compound
•Dielectric grease

Parts Required

•4 spark plugs (specific to Toyota Corolla E170)
•Ignition coil seals (if worn)

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Solution

1. Preparation

Tools Required: Socket set, torque wrench, spark plug socket, ratchet, feeler gauge, anti-seize compound, dielectric grease.
Disconnect the negative battery terminal to ensure safety.
Allow the engine to cool down if it has been running.

2. Remove Engine Cover (if applicable)

Remove any screws or clips securing the engine cover.
Gently lift off the engine cover and set aside.

3. Access the Spark Plugs

Locate the ignition coils on top of the engine; these will be above the spark plugs.
For each ignition coil:
1. Disconnect the electrical connector by pressing the tab and pulling it off.
2. Remove the bolt securing the ignition coil using a socket.
3. Carefully pull the ignition coil straight up to avoid damaging it.

4. Remove Old Spark Plugs

Using a spark plug socket, carefully unscrew and remove each spark plug.
Inspect each plug for signs of wear, such as carbon buildup or damage.

5. Install New Spark Plugs

Check the gap on the new spark plugs using a feeler gauge; adjust if necessary to match manufacturer specifications.
Apply a small amount of anti-seize compound to the threads of the new spark plugs.
Carefully screw in each new spark plug by hand to prevent cross-threading, then tighten to the manufacturer’s specified torque (usually around 13-16 lb-ft).

6. Reinstall Ignition Coils

Apply a small amount of dielectric grease to the inside of the ignition coil boot.
Reinsert each ignition coil into its respective spark plug hole and secure it with the bolt.
Reconnect the electrical connector to each ignition coil.

7. Replace Engine Cover

If removed, place the engine cover back on and secure it with screws or clips.

8. Reconnect Battery

Reattach the negative battery terminal.