1. Introduction
This manual provides essential information for the proper handling, installation, and maintenance of your NGK 9029 Spark Plugs. Designed for automotive applications, these spark plugs are engineered to meet OEM specifications, ensuring reliable ignition and optimal engine performance. Please read this manual thoroughly before proceeding with installation or any related procedures.
2. Safety Information
Always prioritize safety when working with automotive components. Failure to follow safety guidelines can result in injury or damage to your vehicle.
- Ensure the engine is turned off and cool before beginning any work.
- Disconnect the vehicle's battery to prevent accidental electrical discharge.
- Wear appropriate personal protective equipment, including safety glasses and gloves.
- Consult your vehicle's specific service manual for detailed instructions and torque specifications.
- Do not overtighten spark plugs during installation, as this can damage the engine cylinder head.
- Important: NGK 9029 spark plugs are pre-gapped from the factory. Do not attempt to adjust the gap, as this can damage the electrode and affect performance.
3. Product Features
The NGK 9029 Spark Plug offers several key features designed for enhanced performance and durability:
- Trivalent Metal Plating: Provides superior anti-corrosion and anti-seizing properties, ensuring easier removal and installation.
- Copper Core: Utilizes a copper core for excellent heat dissipation and conductivity.
- OEM Specifications: Manufactured to meet or exceed original equipment manufacturer standards for fit and function.
- Improved Efficiency: Contributes to increased fuel economy and reduced harmful emissions.
- Reduced Voltage Requirements: Designed to lower the ignition system's voltage demands, promoting system longevity.

This image displays a pack of four NGK 9029 spark plugs. Each plug features a robust metal construction with a threaded base for secure fitting into the engine block, and a white ceramic insulator with the 'NGK R' logo, designed for optimal electrical insulation and heat dissipation.
4. Installation Guide
The following steps outline a general procedure for spark plug replacement. Always refer to your vehicle's specific service manual for precise instructions and torque values.
- Preparation: Ensure the engine is cool. Gather necessary tools, including a spark plug socket, ratchet, torque wrench, and dielectric grease (optional).
- Access Spark Plugs: Locate the spark plugs, which are typically under ignition coils or spark plug wires. Carefully disconnect and remove the ignition coils or wires. Note their positions to ensure correct reinstallation.
- Remove Old Spark Plugs: Using a spark plug socket and ratchet, carefully loosen and remove the old spark plugs. Turn counter-clockwise. Inspect the old plugs for signs of wear or fouling, which can indicate engine issues.
- Inspect New Spark Plugs: Visually inspect the new NGK 9029 spark plugs for any damage. Confirm they are the correct model for your vehicle. Remember, these plugs are pre-gapped and should not be adjusted.
- Install New Spark Plugs:
- Apply a small amount of anti-seize compound to the spark plug threads (optional, but recommended for easier future removal).
- Carefully thread the new spark plug into the cylinder head by hand to avoid cross-threading.
- Once hand-tight, use a torque wrench to tighten the spark plug to your vehicle manufacturer's specified torque setting. Over-tightening can damage the cylinder head.
- Reconnect Ignition System: Reinstall the ignition coils or spark plug wires, ensuring they are securely connected to their respective spark plugs and electrical connectors.
- Final Check: Double-check all connections and ensure no tools or debris are left in the engine bay. Start the engine and listen for any unusual noises or misfires.
5. Operation and Maintenance
Once installed, NGK 9029 spark plugs operate as an integral part of your vehicle's ignition system, providing the necessary spark for combustion. Proper operation is indicated by smooth engine running, consistent power delivery, and expected fuel efficiency.
For maintenance, spark plugs are generally considered a replacement item rather than a serviceable component. Adhere to your vehicle manufacturer's recommended service intervals for spark plug inspection and replacement. These intervals can typically be found in your vehicle's owner's manual or service guide. Regular replacement ensures continued optimal engine performance, fuel economy, and emission control.
6. Troubleshooting
If you experience engine performance issues after spark plug installation, consider the following common troubleshooting steps:
- Misfires or Rough Idle: Check that all spark plugs are correctly installed and torqued. Ensure ignition coils or wires are securely connected and not damaged.
- Reduced Fuel Economy: While NGK 9029 plugs are designed to improve fuel economy, other factors can affect it. Verify proper installation and consider other engine components.
- Difficulty Starting: Confirm that the spark plugs are firing correctly. This may require diagnostic tools.
- Incorrect Gapping: As noted, NGK 9029 plugs are pre-gapped. If the gap was accidentally altered, the plug's performance would be compromised. Replacement is recommended in such cases.
If issues persist after verifying proper installation, it is recommended to consult a qualified automotive technician for diagnosis.
7. Specifications
| Attribute | Specification |
|---|---|
| Brand | NGK |
| Model Number | 9029 |
| Core Material | Copper |
| Thread Size | 14mm |
| Top Material Type | Metal |
| Vehicle Service Type | Car, Truck |
| Item Weight (per pack of 4) | 2.88 ounces |
| Product Dimensions (packaging) | 3.7 x 0.94 x 3.32 inches |
| OEM Part Number (Cross-reference) | NISSAN 22401JA01B |
| UPC | 463431200522 |
8. Warranty and Support
For information regarding warranty coverage, terms, and conditions for NGK products, please refer to the official NGK website or contact NGK customer support directly. Specific warranty details are subject to change and may vary by region.





