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NGK 3478 Spark Plug
| Brand | NGK 3478 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Stud |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 2 |
| Hex Size | 5/8 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 10.00 |
| Part Number | Cr8ek |
| Stock Number | 3478 |
| Fits | — |
OE supplier heritage. Built by NGK, a long-standing spark plug manufacturer.
Copper core. Promotes reliable ignition performance and heat transfer.
Standard spark plug. Direct replacement for routine ignition service.
Cross-references Anchor 3478, 4158 and 09482-00412 for the same application. See all 7.
NGK CR8EK Standard Spark Plug
The NGK CR8EK standard spark plug is built for dependable ignition performance in a wide range of domestic and import applications. As part number 3478, it combines a copper center electrode core, nickel center and ground electrode tips, and a 5,000 ohm resistor for stable spark delivery and reduced electrical noise.
NGK’s Standard Spark Plug line focuses on OE-style construction and consistent operation for everyday driving. For drivers searching for an NGK spark plug for Honda Civic, Toyota Corolla, or similar applications, CR8EK part number 3478 is a direct-reference option to verify against the vehicle’s required heat range and thread specifications.
Key Features
- NGK Standard Spark Plug, part number 3478
- Resistance: 5,000 ohms
- Copper center electrode core with nickel tip material
- Nickel ground electrode core with standard ground design
- Pre-gapped at .028 inch
- 2 ground electrodes for consistent ignition contact
- 10 mm thread diameter, .75 inch reach, flat seat
- 5/8 inch hex size and stud terminal type
- Manufacturer heat range 8
Product Details
The NGK CR8EK spark plug is engineered to meet original equipment-style requirements for ignition systems that call for a 10 mm, flat-seat plug with a .75 inch reach and heat range 8. Its nickel electrode construction and 5,000 ohm resistance support steady combustion performance and help maintain reliable spark under normal operating conditions. This part number 3478 is commonly searched by buyers comparing NGK CR8EK specifications for Honda Civic and Toyota Corolla service needs.
This part cross-references Anchor 3478 for the same application.
Common Issues This Part Can Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent ignition firing
- Misfire conditions related to weak spark output
- Reduced fuel economy from degraded plug performance
- Engine hesitation during acceleration
Installation Notes and Tips
Verify the vehicle’s required thread diameter, reach, seat type, heat range, and terminal style before installation. Check the plug gap against the engine specification, even though this plug is pre-gapped at .028 inch. Use proper torque procedures and inspect ignition wires or coils for wear before installing new plugs. For Honda Civic, Toyota Corolla, and other direct-reference applications, confirm the OE part number match before service.
Quality Assurance
NGK is a long-established OE supplier and manufacturer with broad coverage across automotive, motorcycle, marine, and small engine applications. The CR8EK part number 3478 reflects NGK’s OE-style approach to durability, fit, and consistent ignition performance.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||