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Champion 312 Spark Plug
Reliable Spark Plug for Jeep Wagoneer and Pontiac Tempest
The Champion Copper Plus 312 spark plug is engineered to deliver consistent ignition performance for select Jeep and Pontiac models. Designed with durable nickel and copper alloy components, this spark plug supports efficient combustion and reliable engine operation.
- Ground electrode core made of nickel for durability
- Nickel center electrode tip for stable spark delivery
- Pre-gap size of 0.025 inches (0.64 mm) for optimal ignition
- Flat seat type ensuring proper fit and seal
- Thread diameter of 14 mm (0.551 inches) with 0.5 inch reach
- Removable nut electrical terminal type for easy installation
- Heat range rating of 87 suitable for small engine applications
- No resistor type to match specific ignition systems
- Hex size of 20.65 mm (0.813 inches) for standard wrench compatibility
Detailed Product Description
The Champion Copper Plus 312 spark plug features a nickel copper alloy ground electrode and a nickel center electrode tip, providing a balance of conductivity and wear resistance. The plug’s pre-gap is set at 0.025 inches (0.64 mm), which supports efficient spark generation and combustion. Its flat seat design ensures a secure fit in the cylinder head, while the 14 mm thread diameter and 0.5 inch reach make it compatible with specific engine configurations. The removable nut electrical terminal type facilitates straightforward connection and maintenance. This spark plug is classified under Champion copper plus small engine parts and carries a manufacturer heat range of 87, making it suitable for the ignition requirements of Jeep Wagoneer and Pontiac Tempest models.
About the Champion Copper Plus Product Line
The Copper Plus line from Champion is designed to provide reliable ignition components with copper core technology. This product line focuses on delivering consistent spark performance and durability through the use of copper and nickel materials. The Copper Plus 312 spark plug is part of this line, offering a balance of conductivity and longevity tailored for small engine applications in vehicles like the Jeep Wagoneer and Pontiac Tempest.
Common Applications and Issues Addressed
- Replacement for worn or fouled spark plugs in Jeep Wagoneer and Pontiac Tempest
- Improves ignition reliability and engine start-up consistency
- Helps reduce misfires caused by electrode wear or gap erosion
- Supports stable combustion to maintain engine performance
- Addresses issues related to improper spark plug fit or heat range mismatch
Installation Notes and Tips
- Verify compatibility with your Jeep Wagoneer or Pontiac Tempest before installation
- Ensure the spark plug gap is set to 0.025 inches (0.64 mm) if adjustment is needed
- Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
- Inspect the spark plug seat and threads for cleanliness before installation
- Replace spark plugs in sets to maintain consistent engine performance
Quality Assurance and Warranty
Champion spark plugs, including the Copper Plus 312, are manufactured to meet industry standards for ignition components. While specific warranty details are not provided here, Champion products typically undergo rigorous quality control to ensure reliable performance. For warranty information, refer to Champion’s official documentation or contact authorized distributors.
| Brand | Champion |
|---|---|
| Part Number | 312 |
| Position | Copper Plus |
| Center Electrode Diameter (Inch) | 0.1 |
| Center Electrode Tip Material | Nickel |
| Classification | Champion Copper Plus Small Engine |
| Electrical Terminal Type | Removable Nut |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Material | Nickel Copper Alloy |
| Ground Electrode Quantity | 1 |
| Hex Size | 0.813 |
| Hex Size | 20.650 |
| Hex Type | Hex |
| Installed Height (Inch) | 2.24 |
| Insulator Height | 0.06 |
| Insulator Projection (Inch) | 0.06 |
| Manufacturer Heat Range | 87 |
| Plug Type | L87YC |
| Pre-Gap Size | 0.025 |
| Pre-Gap Size | 0.64 |
| Reach | 0.5 |
| Resistor Type | No |
| Seat Type | Flat |
| Taper Diameter (Inch) | 0.31 |
| Thread Diameter | 0.551 |
| Thread Diameter | 14.000 |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1967 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Non-Resistor Type; Gap 0.030 (in); Actual OE Part; Plug Type Number L87YC; Copper Plus |
| 1966 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Non-Resistor Type; Gap 0.030 (in); Actual OE Part; Plug Type Number L87YC; Copper Plus |
| 1965 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Non-Resistor Type; Gap 0.030 (in); Actual OE Part; Plug Type Number L87YC; Copper Plus |
| 1964 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Non-Resistor Type; Gap 0.030 (in); Actual OE Part; Plug Type Number L87YC; Copper Plus |
| 1963 | Jeep | Wagoneer | 3.8L | L6 | N/A | Non-Resistor Type; OE Type; Gap 0.030 (in); Plug Type Number L87YC; Copper Plus |
| 1962 | Pontiac | Tempest | 3.5L | V8 | N/A | Non-Resistor Type; OE Type; Gap 0.035 (in); Plug Type Number L87YC; Copper Plus |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.