Here's a general guide. Always consult your owner's manual for specific torque specifications and detailed diagrams. These instructions are for general guidance only and may vary slightly depending on your specific engine configuration.
Tools You'll Need:
* Socket wrench set: You'll likely need a deep well socket that fits your spark plugs (usually 5/8" or 13/16"). A ratchet and extensions will also be helpful.
* Spark plug gap tool: Used to check and adjust the gap of new spark plugs (if needed). The correct gap is specified in your owner's manual.
* Torque wrench: Crucial for tightening the spark plugs to the correct specification to prevent damage. Over-tightening is a common mistake.
* Penetrating oil (like PB Blaster): May help loosen stubborn spark plugs.
* Gloves: To protect your hands.
* New spark plugs: Buy the correct type and heat range specified in your owner's manual.
* Jack and jack stands (highly recommended): Provides easier access and safer working conditions. Never work under a vehicle supported only by a jack.
* Wheel chocks: For added safety.
* Wrench for the coil pack mounting bolts (if applicable): Some Aurora's have individual coil packs per spark plug, others have a coil pack assembly.
Procedure:
1. Safety First: Disconnect the negative battery terminal. Support the vehicle securely on jack stands. Apply wheel chocks.
2. Locate Spark Plugs: The spark plugs are located on the top of the engine. You may need to remove some plastic engine covers for better access. Consult your owner's manual for precise locations.
3. Remove Coil Packs (If Applicable): If your Aurora has individual coil packs, you'll likely need to remove them first. They are usually held in place by bolts or clips. Carefully disconnect the electrical connector from each coil pack before removing it.
4. Remove Spark Plugs: Spray penetrating oil onto the spark plugs if they're difficult to remove. Let it sit for a few minutes. Use the appropriate socket to carefully remove the old spark plugs. Avoid cross-threading. If a spark plug is very stubborn, consider using a spark plug socket with a rubber insert to get a better grip.
5. Inspect Old Spark Plugs: Examine the old plugs for wear, fouling, or damage. This can help diagnose engine problems.
6. Install New Spark Plugs: Carefully install the new spark plugs by hand, screwing them in gently until they are snug. Do not over-tighten by hand.
7. Tighten with Torque Wrench: Use your torque wrench to tighten the spark plugs to the manufacturer's specified torque. This is crucial to prevent damage to the spark plugs and engine block. The torque specification is in your owner's manual. Do not over-tighten.
8. Reinstall Coil Packs (If Applicable): Carefully reinstall the coil packs, making sure the electrical connectors are securely attached.
9. Reconnect Battery Terminal: Reconnect the negative battery terminal.
10. Start the Engine: Start the engine and listen for any unusual noises. Let it run for a few minutes.
Important Considerations:
* Consult your owner's manual: This guide is a general overview. Your owner's manual has specific instructions and torque specifications for your vehicle.
* Gap check: Verify the gap of the new spark plugs matches the manufacturer's specifications.
* Cleanliness: Keep the area around the spark plugs clean to prevent debris from entering the engine.
* Professional help: If you are not comfortable performing this task, take your vehicle to a qualified mechanic.
This process might seem daunting if you're not mechanically inclined. If you're unsure about any step, it's best to seek professional help from a mechanic to avoid potential damage to your engine.
