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Champion 327 Spark Plug
| Brand | Champion 327 |
|---|---|
| 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 | RL87YC |
| Pre-Gap Size | 0.040 |
| Pre-Gap Size | 1.01 |
| Reach | 0.5 |
| Resistor Type | Yes |
| Seat Type | Flat |
| Taper Diameter (Inch) | 0.31 |
| Thread Diameter | 0.551 |
| Thread Diameter | 14.000 |
| Product line | Copper Plus |
| Fits | Hyosung, Yamaha, Honda, Renault, Volvo, Citroen, Rover, Triumph, Morgan, Mercedes-Benz, Fiat, Jeep, Buick, and Pontiac · 11 vehicles |
Copper core electrode. Improves conductivity and heat control for steady wear.
Resistor type. Helps reduce electrical noise for cleaner ignition performance.
Flat seat design. Provides a secure, consistent spark plug fit.
Cross-references AMS Automotive 4632, Carlson 7022 and DENSO Auto Parts 4022 for the same application. See all 20.
Champion Copper Plus 327 Spark Plug Overview
Champion Copper Plus 327 is a resistor spark plug built for dependable ignition performance in small engine and classic vehicle applications. Its copper core electrode improves conductivity and heat control, while nickel center and ground electrode materials support consistent wear characteristics.
Compatible With select Jeep Wagoneer, Buick LeSabre, Buick Skylark, and Pontiac Tempest applications, Champion 327 is a practical choice when you need a direct-replacement spark plug with the correct reach, seat type, and heat range.
Key Features
- Copper core electrode for improved conductivity and heat management
- Nickel center electrode tip and nickel copper alloy ground electrode construction
- Resistor type spark plug for ignition system noise control
- Pre-gapped at 0.040 in / 1.01 mm
- Flat seat design with 0.5 in reach and 14 mm thread diameter
- Champion Copper Plus Small Engine classification
- Part number 327 for easy catalog matching
Product Details
The Champion Copper Plus line focuses on straightforward ignition service with a copper core design that helps transfer heat away from the firing tip and maintain stable performance. This Champion 327 spark plug uses nickel-based electrode materials, a removable nut terminal, and a hex design sized for standard service tools. The 87 heat range, 0.040 in pre-gap, and RL87YC plug type make it a fitment-specific option for applications calling for those specifications, including 1964-1967 Jeep Wagoneer, 1964 Buick LeSabre, 1961-1964 Buick Skylark, and 1962 Pontiac Tempest.
This part cross-references NGK 2633 for the same application.
What It Helps Address
- Hard starting caused by worn or inconsistent spark plugs
- Misfire concerns related to degraded electrode condition
- Rough idle from weak or unstable ignition output
- Heat-related plug wear in service intervals
- Ignition noise concerns in resistor-type applications
Installation Notes and Tips
Verify the required plug type, reach, seat style, thread diameter, and heat range before installation. Champion 327 is a flat-seat plug with a 0.5 in reach and 14 mm threads, so it should be matched to the engine specification exactly. Check the gap against the vehicle or engine requirement before installation, since listed fitment notes include 0.030 in and 0.035 in applications. Use the correct spark plug socket for the hex size and confirm terminal style before connecting the ignition lead.
Quality Assurance
Champion Copper Plus spark plugs are built around a copper core design for conductivity and heat control, with nickel electrode materials selected for dependable wear characteristics. The Champion 327 part number is cataloged for specific OE-style applications, including Jeep Wagoneer, Buick LeSabre, Buick Skylark, and Pontiac Tempest fitments listed above.
- Fits 1964-1967 Jeep Wagoneer, N/A; 1/2 in reach spark plugs; resistor type; gap 0.030 in; plug type RL87YC; Copper Plus
- Fits 1964 Buick LeSabre, N/A; OE type; gap 0.035 in; plug type RL87YC; Copper Plus
- Fits 1961-1964 Buick Skylark, N/A; OE type; gap 0.035 in; plug type RL87YC; Copper Plus
- Fits 1963 Jeep Wagoneer, N/A; resistor type; gap 0.030 in; plug type RL87YC; Copper Plus
- Fits 1962 Pontiac Tempest, N/A; resistor type; gap 0.035 in; plug type RL87YC; Copper Plus
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1967 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Resistor Type; Gap 0.030 (in); Plug Type Number RL87YC; Copper Plus |
| 1966 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Resistor Type; Gap 0.030 (in); Plug Type Number RL87YC; Copper Plus |
| 1965 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Resistor Type; Gap 0.030 (in); Plug Type Number RL87YC; Copper Plus |
| 1964 | Buick | LeSabre | 4.9L | V8 | N/A | OE Type; Gap 0.035 (in); Plug Type Number RL87YC; Copper Plus |
| 1964 | Buick | Skylark | 4.9L | V8 | N/A | OE Type; Gap 0.035 (in); Plug Type Number RL87YC; Copper Plus |
| 1964 | Jeep | Wagoneer | 3.8L | L6 | N/A | 1/2 (in) Reach Spark Plugs; Resistor Type; Gap 0.030 (in); Plug Type Number RL87YC; Copper Plus |
| 1963 | Buick | Skylark | 3.5L | V8 | N/A | OE Type; Gap 0.035 (in); Plug Type Number RL87YC; Copper Plus |
| 1963 | Jeep | Wagoneer | 3.8L | L6 | N/A | Resistor Type; Gap 0.030 (in); Plug Type Number RL87YC; Copper Plus |
| 1962 | Buick | Skylark | 3.5L | V8 | N/A | OE Type; Gap 0.035 (in); Plug Type Number RL87YC; Copper Plus |
| 1962 | Pontiac | Tempest | 3.5L | V8 | N/A | Resistor Type; Gap 0.035 (in); Plug Type Number RL87YC; Copper Plus |
| 1961 | Buick | Skylark | 3.5L | V8 | N/A | OE Type; Gap 0.035 (in); Plug Type Number RL87YC; Copper Plus |
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