Replace Spark Plugs and Coils Nissan MR20DE, T31 Xtrail, Tiida, Juke, Qashqai, Sentra, Renault

Introduction

This tutorial provides a step-by-step guide on how to replace spark plugs and ignition coils for Nissan MR20DE engines. This process is applicable to various Nissan and Renault models, including the Juke, X-Trail, Tiida, Qashqai, and Sentra. Regular maintenance of spark plugs and coils is essential for optimal engine performance and fuel efficiency.

Step 1: Gather Necessary Tools and Materials

Before starting the replacement process, make sure you have the following tools and materials on hand:

• New spark plugs
• New ignition coils
• Socket wrench set
• Torque wrench
• Extension bar (if needed)
• Ratchet
• Screwdrivers (flathead and Phillips)
• Pliers
• Clean cloths
• Engine oil (for spark plug threads)

Practical Tips

• Check your vehicle’s manual for the correct specifications of spark plugs and coils.
• Ensure the engine is cool before starting the replacement to avoid burns.

Step 2: Disconnect the Battery

Safety first! Before working on your vehicle, disconnect the negative terminal of the battery to prevent any electrical shorts.

Step 3: Locate the Spark Plugs and Coils

• Open the hood and locate the engine cover.
• Remove the engine cover if applicable, usually held in place by bolts or clips.
• Identify the location of the spark plugs and ignition coils. They are typically found on the top of the engine.

Step 4: Remove the Ignition Coils

1. Disconnect the electrical connectors from each ignition coil.
2. Remove the bolts securing the ignition coils using a socket wrench.
3. Carefully pull the ignition coils out of their sockets.

Common Pitfalls

• Be gentle when pulling out coils to avoid damaging them or the connector.

Step 5: Remove the Spark Plugs

1. Use a spark plug socket and ratchet to loosen and remove each spark plug.
2. Turn counterclockwise until the spark plug is free, then lift it out of the cylinder head.

Practical Advice

• Inspect the old spark plugs for signs of wear or damage. This can indicate underlying engine issues.

Step 6: Prepare New Spark Plugs

• Before installing the new spark plugs, apply a small amount of engine oil to the threads. This helps with installation and future removal.

Step 7: Install New Spark Plugs

1. Carefully thread the new spark plugs into the cylinder head by hand to avoid cross-threading.
2. Use a torque wrench to tighten the spark plugs to the manufacturer’s specified torque setting.

Step 8: Install New Ignition Coils

1. Insert the new ignition coils into their respective sockets.
2. Secure them with bolts and reconnect the electrical connectors.

Step 9: Reassemble the Engine Cover

• If you removed the engine cover, reinstall it and secure it with the bolts or clips.

Step 10: Reconnect the Battery

• Reconnect the negative terminal of the battery to restore electrical power.

Conclusion

Replacing spark plugs and ignition coils is an essential maintenance task that can enhance engine performance and efficiency. After completing the replacement, start the engine and listen for any irregular sounds. If everything sounds good, you’ve successfully completed the task! For ongoing maintenance, consider checking your spark plugs and coils every 30,000 miles or as recommended by your vehicle’s manual.