Denso SC16HR11
Denso 3499 Iridium Long-Life Spark Plug User Manual
Model: SC16HR11
1. Introdución
This manual provides essential information for the proper installation, operation, and maintenance of your Denso 3499 Iridium Long-Life Spark Plug. Please read this manual thoroughly before attempting any installation or service to ensure safety and optimal performance.
2. Produto rematadoview
The Denso 3499 Iridium Long-Life Spark Plug (Model SC16HR11) is engineered for superior performance and extended durability in various automotive applications. Featuring an iridium tip, it provides consistent ignition and contributes to efficient fuel combustion.
- Genuine DENSO Parts: Ensures authenticity and quality.
- Iridium Long-Life Design: Offers extended service intervals and reliable performance.
- Direct Replacement: Designed to fit specific vehicle applications as a direct replacement.
- Includes original packaging and hardware.

Image: The Denso 3499 Iridium Long-Life Spark Plug shown alongside its product packaging.

Image: A visual representation of three different types of Denso Iridium spark plugs, highlighting their distinct designs.
3. Información de seguridade
Prioriza sempre a seguridade ao traballar no teu vehículo. O incumprimento das precaucións de seguridade pode provocar lesións ou danos no vehículo.
- Asegúrese de que o motor estea completamente apagado e frío antes de comezar calquera traballo.
- Disconnect the negative terminal of the battery to prevent accidental electrical discharge.
- Usar o equipo de protección individual (EPI) axeitado, incluíndo lentes e luvas de seguridade.
- Use only the correct tools for spark plug removal and installation.
- Keep spark plugs and tools away from children.
4. Configuración e instalación
Proper installation is crucial for the performance and longevity of your spark plugs. Consult your vehicle's service manual for specific instructions and torque specifications.
- Preparación: Allow the engine to cool completely. Gather necessary tools: spark plug socket, ratchet, torque wrench, anti-seize compound, dielectric grease (optional).
- Buxías de acceso: Locate the spark plugs. This may involve removing engine covers, ignition coils, or spark plug wires. Note the order of removal to ensure correct reinstallation.
- Retirar as buxías vellas: Use a spark plug socket to carefully loosen and remove the old spark plugs. Inspect them for signs of wear or issues.
- Inspeccionar as buxías novas: Visually inspect the new Denso spark plugs for any damage. The gap is typically pre-set from the factory for Iridium plugs; avoid adjusting unless specified by your vehicle manufacturer.
- Aplicar antiaglomerante: Apply a small amount of anti-seize compound to the threads of the new spark plug. Avoid getting it on the electrode or insulator.
- Instalar novas buxías: Carefully thread the new spark plug into the cylinder head by hand to prevent cross-threading. Once finger-tight, use a torque wrench to tighten to the manufacturer's specified torque. Overtightening can damage the spark plug or cylinder head.
- Remontar: Reinstall ignition coils or spark plug wires, ensuring they are securely connected. Reattach any removed engine covers.
- Verificación final: Double-check all connections and ensure no tools or debris are left in the engine bay.

Imaxe: Unha detallada view of the spark plug's electrode and ground strap, highlighting the iridium tip.

Image: A close-up of the ceramic insulator and metal body of the spark plug, showing the Denso branding and model number.
5. Principios de funcionamento
Spark plugs are a critical component of your vehicle's ignition system. They ignite the air-fuel mixture in the engine's combustion chambers, creating the power stroke that drives the engine. The Denso Iridium Long-Life spark plug is designed to provide a strong, consistent spark for efficient combustion and reduced emissions over an extended period.
6. Mantemento
Denso Iridium Long-Life spark plugs are designed for extended service intervals. Refer to your vehicle manufacturer's recommended maintenance schedule for spark plug inspection and replacement. Typically, iridium plugs can last significantly longer than traditional copper plugs.
- Inspección periódica: During routine maintenance, visually inspect spark plugs for signs of wear, fouling, or damage.
- Substitución: Replace spark plugs as per your vehicle's maintenance schedule or if performance issues arise.
- Proper Gapping: While Denso Iridium plugs are typically pre-gapped, always verify the correct gap for your specific vehicle application using a wire-type gap tool if necessary, though adjusting iridium tips should be avoided if possible.
7. Solución de problemas comúns
If you experience issues after spark plug installation or during their service life, consider the following common problems:
| Síntoma | Causa posible | Solución |
|---|---|---|
| Fallo de acendido do motor / Ralentí irregular | Incorrectly gapped plug, fouled plug, damaged plug, loose connection. | Check plug gap, inspect for fouling/damage, ensure ignition coil/wire is securely connected. |
| Economía de combustible reducida | Worn or fouled spark plugs. | Inspect and replace spark plugs if necessary. |
| Dificultade para comezar | Weak spark due to worn plugs or ignition system issues. | Check spark plugs and ignition system components. |
| Comprobar a luz do motor | Fallo de acendido detectado polo ordenador do vehículo. | Scan for diagnostic trouble codes (DTCs) and address the root cause, which may include spark plug issues. |
Se os pasos de resolución de problemas non resolven o problema, recoméndase consultar un técnico de automoción cualificado.
8. Especificacións
| Atributo | Detalle |
|---|---|
| Marca | Denso |
| Número de modelo | SC16HR11 |
| Material do núcleo | Platino |
| Tamaño do oco | 1.1 milímetros |
| Tamaño da rosca | 1.25 mm |
| Tipo de material superior | Metal |
| Peso do elemento | 1.41 onzas |
| Dimensións do produto | 9.35 x 5.51 x 3.07 polgadas |
| Número de peza OEM | CITROËN/PEUGEOT 1611548180, DAIHATSU 90919-01253, DAIHATSU 90919-01275, SUBARU 90919-01253, TOYOTA 90919-01253 |
| UPC | 042511034990 |
9. Garantía e soporte
For information regarding warranty coverage and technical support for your Denso spark plugs, please refer to the official Denso websitio web ou póñase en contacto directamente co servizo de atención ao cliente de Denso. Garde o recibo da compra como proba da mesma.
Oficial de Denso Websitio: www.denso.com
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