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Denso 3108 Spark Plug
| Brand | Denso 3108 |
|---|---|
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Ground Configuration | Semi-Surface |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | Standard |
| Hex Size | 20.6 |
| Manufacturer Heat Range | 14 |
| Pre-Gap Size | 1.1 |
| Reach | 19.00 |
| Resistance | 5000 |
| Seat Type | Flat |
| Thread Diameter | 14.00 |
| Product line | U-Groove Conventional |
| Fits | Honda · 2 vehicles |
OEM-specified design. Special ground electrode configuration for consistent ignition performance.
U-Groove Conventional. A proven spark plug line with a distinctive ground electrode shape.
Nickel and copper construction. Uses durable electrode materials for reliable spark delivery.
Cross-references DENSO Auto Parts W14EKR-S11, Honda 98079-541-83 and Honda 98079-541-83S for the same application. See all 3.
Denso 3108 Spark Plug for Honda Civic
The Denso 3108 is a conventional spark plug built with an OEM-specified special ground electrode configuration for consistent ignition performance. It is a direct-fit choice for select Honda Civic applications, including 1985 Honda Civic and 1987 Honda Civic models.
Key Features
- U-Groove Conventional spark plug design from Denso
- OEM-specified special ground electrode configuration
- Copper center electrode core material for stable conductivity
- Nickel center and ground electrode tip materials
- 5000 ohm resistance for ignition system noise control
- Flat seat design with 14.00 mm thread diameter and 19.00 mm reach
- Pre-gapped to 1.1 mm
- Manufacturer heat range 14
Product Details
Denso 3108 is part of the U-Groove Conventional product line, which focuses on a traditional spark plug construction with a specialized ground electrode profile. The semi-surface ground configuration and single ground electrode support reliable spark exposure, while the copper core helps maintain efficient heat transfer. This spark plug is specified for select Honda Civic applications and is a practical OE-style replacement for ignition service on those vehicles. This part cross-references Denso Auto Parts W14EKR-S11 and Honda 98079-541-83 for the same application.
What It Helps Address
- Hard starting caused by worn or fouled spark plugs
- Misfire conditions related to weak ignition output
- Rough idle from inconsistent spark delivery
- Reduced throttle response from degraded plug performance
- Maintenance replacement for aging Honda Civic ignition service
Installation Notes and Tips
Verify thread diameter, reach, seat type, and heat range before installation. The Denso 3108 uses a flat seat and 14.00 mm thread diameter, so correct torque and clean cylinder head threads are important for proper sealing. Confirm the pre-gap specification against your engine requirements before installation, and inspect ignition wires, distributor components, and coil condition during service.
Quality Assurance
Denso manufactures this spark plug to OE-style specifications with an OEM-specified ground electrode configuration for the listed Honda Civic applications. Confirmed fitment includes Fits 1985 Honda Civic, N/A and Fits 1987 Honda Civic, N/A.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1987 | Honda | Civic | N/A | U-Groove Conventional |
| 1985 | Honda | Civic | N/A | U-Groove Conventional |
| No rows match your filter. | ||||