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NGK 6629 Spark Plug
| Brand | NGK 6629 |
|---|---|
| Resistance | 1 |
| 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 | .036 |
| Ground Electrode Quantity | 1 |
| Hex Size | 18 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 9 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 12.00 |
| Part Number | Dp9ea-9 |
| Stock Number | 6629 |
| Fits | —7 vehicles |
OE-focused design. Built to original-equipment standards for consistent ignition performance.
Copper core center. Helps manage heat transfer for stable spark plug operation.
Pre-gapped .036. Ready for service with a standard gap setting.
Cross-references AMS Automotive 4152, AMS Automotive 6629 and 4108 for the same application. See all 11.
Overview
NGK 6629 is a standard spark plug built for reliable ignition performance and OE-style serviceability. It uses a copper core center electrode with nickel tip materials and a standard ground configuration for consistent spark delivery.
Compatible with a wide range of ignition service needs, this NGK spark plug is identified by part number 6629 and stock number 6629. The DP9EA-9 design supports straightforward replacement selection when matching the correct thread, reach, seat, and heat range.
Key Features
- Standard spark plug design for routine ignition service
- Copper core center electrode for stable thermal control
- Nickel tip materials on the center and ground electrodes
- 1 ohm resistance for ignition circuit compatibility
- Flat seat, 12 mm thread diameter, and 0.75 reach
- Pre-gapped to .036 for installation efficiency
Product Details
NGK 6629 is a conventional spark plug engineered around OE manufacturing standards and broad application coverage. The stud terminal, standard ground electrode layout, and 18 mm hex size make it a practical replacement choice for service work where the original plug specification calls for the DP9EA-9 configuration. NGK spark plugs are backed by the company’s long history as a major OE supplier in North America, and this part number 6629 reflects that same focus on durability and consistent operation.
Common Issues This Part Can Address
- Hard starting caused by worn spark plug electrodes
- Misfire from excessive plug wear or incorrect gap
- Rough idle related to weak ignition output
- Reduced throttle response from inconsistent spark delivery
- Service intervals due to aged or fouled plugs
Installation Notes
Verify the required thread diameter, reach, seat type, heat range, and terminal style before installation. Confirm the gap specification against the vehicle service information, even when the plug arrives pre-gapped. Use proper torque procedures and inspect the ignition system for wear before installing NGK 6629.
Quality Assurance
NGK is a major OE supplier and manufacturer of spark plugs for domestic and import vehicles in North America. The brand’s OE legacy and manufacturing focus support consistent quality and original-equipment standards across its ignition products.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 1993 | Suzuki | DR650S | -L | -- | Spark plug with a gap of 0.036 inches.; Standard Spark Plug |
| 1992 | Suzuki | DR650S | -L | -- | Spark plug with a gap of 0.036 inches.; Standard Spark Plug |
| 1991 | Suzuki | DR650S | -L | -- | Spark plug with a gap of 0.036 inches.; Standard Spark Plug |
| 1990 | Suzuki | DR650S | -L | -- | Spark plug with a gap of 0.036 inches.; Standard Spark Plug |
| 1985 | Kawasaki | ZX550 GPZ | -L | -- | Spark plug with a gap of 0.036 inches.; Standard Spark Plug |
| 1985 | Suzuki | SP600 | -L | -- | Spark plug with a gap of 0.036 inches.; Standard Spark Plug |
| 1984 | Kawasaki | ZX550 GPZ | -L | -- | Spark plug with a gap of 0.036 inches.; Standard Spark Plug |
| No rows match your filter. | |||||