1. Introduction
The Denso ITF20 Iridium Power Spark Plug is engineered for enhanced engine performance and ignitability. Featuring the world's smallest 0.4mm iridium center electrode, this spark plug is designed to maximize firing potential. Its patented U-Groove ground electrode further optimizes flame kernel growth while minimizing the required voltage, contributing to increased performance and fuel efficiency in compatible engines.
2. Product Features
- 0.4 mm Iridium Center Electrode: World's smallest diameter, designed to maximize firing potential for efficient combustion.
- U-Groove and Taper Cut Ground Electrode: Promotes faster spark flame growth and reduces heat quenching, enhancing ignition efficiency.
- DENSO Patented 360 Degree Laser Welding Process: Ensures an exceptionally strong and durable bond with the iridium center electrode, contributing to long-term reliability.
Figure 1: A close-up view of the Denso ITF20 Iridium Power Spark Plug, showing its ceramic insulator, metal shell, and electrode tip. The "IRIDIUM ITF20" branding is visible on the white ceramic section.
3. Installation Guide
Proper installation is crucial for optimal performance and longevity of your Denso Iridium Power Spark Plugs. If you are unsure about any step, it is recommended to consult a qualified mechanic.
Safety Precautions:
- Ensure the engine is cool before beginning work to prevent burns.
- Disconnect the negative terminal of the vehicle's battery to prevent accidental electrical discharge.
- Wear appropriate personal protective equipment, including gloves and eye protection.
Tools Required:
- Spark plug socket (correct size for your vehicle)
- Ratchet and extension
- Torque wrench
- Spark plug gap tool (if necessary, though Iridium plugs are often pre-gapped)
- Dielectric grease (optional, for spark plug boots)
- Anti-seize compound (optional, for spark plug threads)
Installation Steps:
- Locate Spark Plugs: Identify the spark plug wires or coil packs connected to the spark plugs on your engine.
- Remove Wires/Coil Packs: Carefully disconnect the spark plug wires or remove the coil packs. Note the order to ensure correct reinstallation.
- Clean Around Plugs: Before removing old plugs, clean any debris around the spark plug wells to prevent it from falling into the combustion chamber.
- Remove Old Plugs: Use the spark plug socket and ratchet to loosen and remove the old spark plugs. Turn counter-clockwise.
- Inspect New Plugs: Carefully inspect the new Denso ITF20 spark plugs for any damage. Do not attempt to re-gap Iridium spark plugs unless specifically instructed by the vehicle manufacturer, as this can damage the fine electrode.
- Apply Anti-Seize (Optional): Apply a small amount of anti-seize compound to the threads of the new spark plug, avoiding the electrode tip.
- Install New Plugs: Hand-thread the new spark plugs into the cylinder head to avoid cross-threading. Once hand-tight, use a torque wrench to tighten them to the vehicle manufacturer's specified torque setting. Overtightening can damage the spark plug or cylinder head.
- Reconnect Wires/Coil Packs: Reconnect the spark plug wires or coil packs, ensuring they are securely seated. Apply dielectric grease to the inside of the spark plug boots if desired.
- Reconnect Battery: Reconnect the negative terminal of the vehicle's battery.
- Test: Start the engine and check for smooth operation.
4. Operation and Function
The Denso ITF20 Iridium Power Spark Plug functions as a critical component in the internal combustion engine's ignition system. Its primary role is to ignite the air-fuel mixture within the engine's cylinders. When the ignition coil sends a high-voltage electrical pulse, the spark plug creates a spark across its electrodes. This spark ignites the compressed mixture, initiating the combustion process that drives the engine's pistons.
The advanced design of the Denso ITF20, with its fine iridium center electrode and U-Groove ground electrode, ensures a more consistent and powerful spark. This leads to more complete combustion, which can result in improved engine performance, better fuel economy, and reduced emissions compared to conventional spark plugs.
5. Maintenance and Replacement
Spark plugs are wear items and require periodic replacement. Unlike some other engine components, spark plugs typically do not require routine maintenance beyond replacement.
Replacement Intervals:
Denso Iridium Power spark plugs are designed for extended durability. Consult your vehicle's owner's manual for the recommended spark plug replacement interval. These intervals can vary significantly between vehicle manufacturers and models, but iridium plugs generally last longer than traditional copper or platinum plugs.
Signs of Worn Spark Plugs:
- Reduced fuel economy
- Engine misfires or rough idling
- Difficulty starting the engine
- Lack of acceleration or power
- Check Engine Light illumination (often related to misfires)
If you experience any of these symptoms, it may be time to inspect or replace your spark plugs.
6. Troubleshooting
While Denso Iridium Power spark plugs are highly reliable, issues can sometimes arise that may be related to spark plug performance or installation. Here are some common symptoms and potential causes:
| Symptom | Possible Cause (Spark Plug Related) | Solution |
|---|---|---|
| Engine Misfire / Rough Idle | Fouled, worn, or incorrectly gapped spark plug; damaged spark plug wire/coil pack. | Inspect spark plugs for deposits or wear. Ensure proper gap (if applicable). Check spark plug wires/coil packs for damage or loose connections. Replace faulty components. |
| Hard Starting | Worn spark plugs not producing a strong enough spark. | Replace spark plugs if they are past their service life or show signs of significant wear. |
| Reduced Fuel Economy | Inefficient combustion due to worn or fouled spark plugs. | Inspect and replace spark plugs as part of routine maintenance. |
| Engine Knocking / Pinging | Incorrect heat range spark plug (less common with direct replacement). | Ensure the correct spark plug model (ITF20) is used for your vehicle. Consult a professional if knocking persists. |
Note: Many engine issues can mimic spark plug problems. If troubleshooting steps do not resolve the issue, it is advisable to seek professional automotive diagnostic services.
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | Denso |
| Model Number | ITF20 |
| Manufacturer Part Number | 267700-0670 |
| Core Material | Iridium |
| Top Material Type | Nickel |
| Vehicle Service Type | Motorcycle (Note: Always verify compatibility with your specific vehicle.) |
| Item Weight | 0.8 ounces |
| Product Dimensions | 1.4 x 3.6 x 1.1 inches |
| Global Trade Identification Number (GTIN) | 00042511053311 |
| UPC | 042511053311 |
| ASIN | B000CJ04AA |
| Date First Available | November 23, 2005 |
8. Warranty Information
Specific warranty terms for the Denso ITF20 Iridium Power Spark Plug are provided by the manufacturer, Denso, or the authorized seller at the time of purchase. Please retain your proof of purchase. For detailed warranty coverage, duration, and claim procedures, refer to the documentation included with your product or visit the official Denso website.
9. Support
For technical assistance, product inquiries, or support regarding your Denso ITF20 Iridium Power Spark Plug, please contact Denso customer service or an authorized Denso distributor. You can typically find contact information on the official Denso website or through your product retailer.
When contacting support, please have your product model number (ITF20) and any relevant purchase details ready to facilitate a quicker resolution.
