1. Introduction
This manual provides essential information for the proper handling, installation, and maintenance of your ACDelco R42XLS Spark Plug. Designed for reliable and efficient performance, this spark plug is a critical component in your vehicle's ignition system. Please read these instructions carefully before proceeding with installation or maintenance.
2. Product Overview
The ACDelco R42XLS Spark Plug is engineered to deliver consistent ignition performance. It features a copper core for maximized conventional durability and a nickel top material. This spark plug is designed for vehicle-specific fitment, particularly for motorcycle service types.
Image: Full view of the ACDelco R42XLS Spark Plug, showing the ceramic insulator, metal shell, and electrode tip.
Image: Close-up view of the electrode tip of an ACDelco R42XLS Spark Plug, highlighting the gap and ground electrode.
3. Key Features
- Copper Core: Designed for maximized conventional durability, ensuring consistent performance.
- Nickel Top Material: Provides robust construction for longevity.
- Vehicle Specific Fit: Engineered for precise fitment in compatible vehicles, particularly motorcycles.
- Reliable Ignition: Contributes to efficient engine operation and fuel combustion.
Video: An overview of ACDelco Spark Plugs, detailing their design and various types, including OE Iridium, Double Platinum, and Gold RAPIDFIRE. This video highlights the engineering behind ACDelco's spark plug range for reliable and efficient performance.
4. Installation
Proper installation of spark plugs is crucial for optimal engine performance and longevity. Incorrect installation can lead to engine damage or reduced efficiency. It is highly recommended that spark plug replacement be performed by a qualified mechanic or an individual with appropriate automotive repair experience.
General Installation Guidelines:
- Safety First: Ensure the engine is cool before beginning work. Disconnect the negative battery terminal to prevent accidental starting.
- Identify and Remove Old Plugs: Carefully remove spark plug wires or coil packs. Use a spark plug socket to loosen and remove the old spark plugs. Note the condition of the old plugs as it can indicate engine health.
- Inspect New Plugs: Verify the new ACDelco R42XLS spark plugs are the correct type and that the electrode gap is set according to your vehicle manufacturer's specifications. Refer to your vehicle's service manual for precise gap settings.
- Install New Plugs: Hand-thread the new spark plugs into the cylinder head to avoid cross-threading. Once finger-tight, use a torque wrench to tighten them to the manufacturer's specified torque. Overtightening or undertightening can cause issues.
- Reconnect Components: Reattach spark plug wires or coil packs, ensuring they are securely connected to the correct cylinders. Reconnect the negative battery terminal.
- Test: Start the engine and listen for any unusual noises or misfires.
Always consult your vehicle's specific service manual for detailed instructions and torque specifications.
5. Operating Principles
The spark plug is responsible for igniting the air-fuel mixture in the engine's combustion chamber. When high voltage is applied to the center electrode, it creates a spark that jumps across the gap to the ground electrode, initiating combustion. The ACDelco R42XLS is designed to provide a consistent and powerful spark, contributing to efficient fuel consumption and smooth engine operation.
6. Maintenance
Spark plugs are wear items and require periodic inspection and replacement. The lifespan of a spark plug can vary based on engine type, driving conditions, and spark plug material. While the ACDelco R42XLS is designed for durability, regular checks are recommended.
Maintenance Tips:
- Regular Inspection: Inspect spark plugs at recommended service intervals (refer to your vehicle's manual). Look for signs of wear, fouling (carbon, oil, or fuel deposits), or damage to the electrodes.
- Gap Check: Periodically check the electrode gap. If it's outside the manufacturer's specification, adjust it carefully or replace the plug.
- Replacement: Replace spark plugs according to your vehicle manufacturer's recommended schedule, typically every 30,000 to 100,000 miles depending on the spark plug type and engine.
- Cleanliness: Keep the area around the spark plugs clean to prevent debris from entering the combustion chamber during removal or installation.
7. Troubleshooting Common Issues
Issues with spark plugs can manifest in various engine performance problems. Here are some common symptoms and potential causes:
| Symptom | Potential Cause | Action |
|---|---|---|
| Engine Misfire or Rough Idling | Fouled, worn, or incorrectly gapped spark plug. | Inspect and replace spark plugs. Check ignition system components. |
| Reduced Fuel Economy | Inefficient combustion due to worn spark plugs. | Replace spark plugs at recommended intervals. |
| Difficulty Starting Engine | Weak or no spark from faulty plugs. | Check spark plugs and ignition system. |
| Engine Knocking or Pinging | Incorrect heat range spark plug or pre-ignition. | Ensure correct spark plug type is used. Consult a mechanic. |
If you experience persistent issues, consult a professional automotive technician.
8. Specifications
| Specification | Detail |
|---|---|
| Brand | ACDelco |
| Model Number | R42XLS |
| Core Material | Copper |
| Thread Size | 14mm |
| Top Material Type | Nickel |
| Vehicle Service Type | Motorcycle |
| Item Weight | 2.08 ounces |
| Package Dimensions | 3.43 x 1.06 x 1.02 inches |
| UPC | 808709159902 |
9. Warranty and Support
ACDelco Spark Plugs are backed by GM with competitive limited-warranty coverage. For specific warranty details and to register your product, please refer to the official ACDelco website or contact their customer support. Keep your purchase receipt for warranty claims.
For further assistance or technical support, please visit the ACDelco Store on Amazon or the official ACDelco website.
