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NGK 7669 Spark Plug
| Brand | NGK 7669 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Taper cut |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Stud |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 5/8 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .5 |
| Thread Diameter | 10.00 |
| Part Number | Cr8hix |
| Stock Number | 7669 |
| Fits | — |
Iridium tip. Promotes strong spark performance and long service life.
Copper core. Helps transfer heat efficiently for stable operation.
OE supplier heritage. Built by NGK, a long-time original equipment manufacturer.
Cross-references Carlson 7669, DENSO Auto Parts 5384 and StrongArm 4215 for the same application. See all 11.
NGK Iridium IX Spark Plug 7669 Overview
NGK Iridium IX Spark Plug 7669 is built for drivers who want precise ignition performance and stable combustion in a wide range of domestic and import applications. This plug uses an iridium center electrode, a nickel ground electrode, and a 0.028 pre-gap to support consistent spark delivery in engines that call for a flat-seat, 10 mm spark plug.
As part of the NGK Iridium IX Spark Plug line, this plug reflects NGK’s long OE manufacturing background and focus on original-equipment standards. It is a practical choice for maintenance on vehicles such as Honda Civic and other applications that specify the CR8HIX configuration.
Key Features
- NGK Iridium IX Spark Plug, part number 7669
- Iridium center electrode tip for durable spark performance
- Copper core center electrode for efficient heat transfer
- Nickel ground electrode with taper-cut tip design
- 5,000 ohm resistance for ignition system compatibility
- Flat seat, 10 mm thread diameter, 0.5 reach
- Pre-gapped to 0.028 for specified applications
- Heat range 8 with stud terminal type
Product Details
NGK 7669 is a CR8HIX spark plug engineered for engines that require a 5/8 hex, flat-seat plug with a 0.5-inch reach and a 10 mm thread diameter. The iridium tip helps maintain a consistent spark point, while the copper core supports heat dissipation under normal operating conditions. This combination is suited to ignition service where stable firing and reliable combustion matter, including Honda Civic applications that call for the CR8HIX specification.
This part cross-references DENSO Auto Parts 5384 for the same application.
What It Helps Address
- Hard starting caused by worn spark plug electrodes
- Rough idle from inconsistent ignition firing
- Misfire conditions tied to plug wear or gap drift
- Reduced throttle response from weak spark delivery
- Maintenance replacement for vehicles calling for NGK 7669 or CR8HIX
Installation Notes and Tips
Verify the engine calls for a 10 mm, flat-seat spark plug with a 0.5 reach before installation. Check the specified gap and compare it to the engine requirement before threading the plug into the cylinder head. Use the correct 5/8 hex spark plug socket and tighten to the vehicle manufacturer’s torque specification. For Honda Civic and similar applications, confirm the OE-equivalent plug code and heat range before service.
Quality Assurance
NGK is a major OE spark plug supplier in North America and manufactures ignition components for domestic and import vehicles, motorcycles, marine engines, and small engines. Part number 7669 is produced to support original-equipment standards for durability and operational performance.
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