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The NGK APR6FS spark plug is designed for petrol engine owners who require a reliable, high-quality ignition component for consistent combustion. It is ideal for users performing routine engine maintenance or replacing worn-out ignition parts, offering a dependable nickel center electrode for reliable sparking. However, users should be aware that this is a specific taper-seat design, meaning it is not compatible with engines requiring a flat-gasket seat, necessitating careful verification of your engine's compatibility before installation.
| Model Part Number | APR6FS |
|---|---|
| Brand | NGK |
While NGK plugs are often set to a general factory gap, you should always check the gap against your vehicle manufacturer's specifications before installation.
This plug uses a 20.8 mm hex nut size.
No, this plug is designed with a taper seat. Using it in a flat-seat application will not create a proper seal and may damage the cylinder head.
This indicates the plug has an internal resistor designed to reduce electromagnetic interference (EMI) that could otherwise disrupt sensitive vehicle electronics.
Service life varies based on engine condition, driving habits, and fuel quality; follow your vehicle's maintenance schedule for recommended replacement intervals.
Check the spark plug gap to ensure it meets your engine's technical specifications and verify that the plug wire is securely attached to the SAE connector.
Stop immediately to avoid cross-threading. Remove the plug, inspect the cylinder head threads, and verify that the plug is the correct size (18mm) for your engine.
Check your air-fuel mixture ratio and ensure your engine is not running too rich, as improper combustion can cause premature electrode fouling.
Installation requires a 20.8mm spark plug socket. Before threading the plug into the cylinder head, ensure the threads are clean and free of debris. Since this plug uses a taper seat, it does not require a crush washer; tighten it carefully to the manufacturer's specified torque to ensure the taper seals correctly against the head.
Compatibility check: Always cross-reference the `APR6FS` part number or trade number `2922` with your vehicle owner's manual or engine service guide to ensure the thread length (10.9mm) and reach are correct for your specific engine model. Periodically inspect the electrode for signs of wear or carbon buildup to maintain peak efficiency.
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