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Denso 6008 Spark Plug
| Brand | Denso 6008 |
|---|---|
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | U-Groove |
| Hex Size | 20.6 |
| Manufacturer Heat Range | 14 |
| Pre-Gap Size | 0.7 |
| Reach | 09.50 |
| Seat Type | Flat |
| Thread Diameter | 14.00 |
| Product line | U-Groove Conventional |
| Fits | Avanti and Chevrolet · 5 vehicles |
U-Groove design. Improves ignitability for more efficient engine performance.
Copper core. Helps deliver reliable spark performance.
Nickel electrodes. Built with nickel tips and core materials for consistent operation.
Cross-references DENSO Auto Parts W14-U for the same application. See all 1.
Denso 6008 U-Groove Spark Plug Overview
Denso 6008 is a conventional spark plug built for direct ignition performance in older Chevrolet applications. Its U-Groove ground electrode design helps improve ignitability, supporting more efficient combustion in the engine.
Compatible With 1969 Chevrolet C10 Suburban, C20 Suburban, El Camino, K10 Suburban, and K20 Suburban applications, this plug is a fitment-focused choice for classic GM secondary ignition service.
Key Features
- U-Groove ground electrode tip design for improved spark exposure
- Conventional spark plug construction for standard ignition systems
- Copper center electrode core material for stable conductivity
- Nickel center and ground electrode tip materials
- Pre-gapped to 0.7 for specified installation setup
- 14 mm thread diameter with flat seat design
- 20.6 hex size, 9.50 reach, and manufacturer heat range 14
Product Details
The Denso U-Groove Conventional line focuses on dependable ignition performance with a design that increases the spark’s exposure at the ground electrode. That geometry can help the plug fire more consistently under normal operating conditions, which is important for maintaining smooth combustion and engine efficiency. Part number 6008 cross-references DENSO Auto Parts W14-U for the same application.
For 1969 Chevrolet C10 Suburban, C20 Suburban, El Camino, K10 Suburban, and K20 Suburban models, Denso 6008 provides the specifications needed for a direct spark plug replacement in the listed secondary ignition applications.
Common Issues This Part Can Address
- Hard starting caused by worn spark plug electrodes
- Rough idle from inconsistent spark delivery
- Misfire symptoms related to aged ignition components
- Reduced combustion efficiency from degraded plug performance
- Maintenance replacement for original-style ignition service
Installation Notes and Tips
Verify thread diameter, reach, seat type, and heat range against the engine specification before installation. Check the pre-gap setting during service and confirm the plug is tightened to the manufacturer’s recommended torque for the cylinder head material. Inspect ignition wires, distributor components, and coil condition at the same time to avoid repeat ignition faults.
Quality Assurance
Denso is known for OE-level ignition component engineering, and the U-Groove Conventional product line is built around consistent spark delivery and practical serviceability for classic vehicle maintenance.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1969 | Chevrolet | C10 Suburban | N/A | U-Groove Conventional |
| 1969 | Chevrolet | C20 Suburban | N/A | U-Groove Conventional |
| 1969 | Chevrolet | El Camino | N/A | U-Groove Conventional |
| 1969 | Chevrolet | K10 Suburban | N/A | U-Groove Conventional |
| 1969 | Chevrolet | K20 Suburban | N/A | U-Groove Conventional |
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