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The NGK 97439 Laser Iridium Spark Plug is designed for automotive enthusiasts and DIY mechanics looking to restore or maintain peak ignition performance in compatible engines. Featuring a high-grade iridium center electrode, this plug provides exceptional durability and reliable starts, though users must be careful to verify exact vehicle compatibility before installation to avoid engine mismatch issues.
| Model Part Number | NGK-DILKAR7E11HS |
|---|---|
| Brand | NGK |
Yes, it is factory-set to a 1.1mm gap, though it is good practice to verify this before installation.
NGK generally advises against using anti-seize on their plugs, as they feature a special trivalent plating designed to prevent seizing.
Refer to your vehicle owner's manual for recommended service intervals, as replacement timing depends on your specific engine type.
This is a single NGK 97439 spark plug; ensure you purchase the correct quantity for your engine's cylinder count.
Iridium is much harder and has a higher melting point than standard materials, allowing for a thinner electrode that improves ignitability and durability.
Verify that the ignition coil is fully seated and the electrical connector is clicked into place.
Stop immediately to prevent stripping; remove the plug, check the threads for debris, and start the threading process by hand.
Re-check the electrode gap; if it was dropped during installation, it may have closed or widened outside the 1.1mm spec.
Before installation, always verify the `NGK-DILKAR7E11HS` part number against your vehicle's service manual or NGK’s online catalog, as minor variations in thread pitch (1.25mm) and reach (28.5mm) can cause engine damage. Use a 14mm spark plug socket to avoid damaging the ceramic insulator. Do not apply excessive force; tighten to the manufacturer's specified torque. Check the electrode gap before installation to ensure it remains at the factory-set 1.1mm, as impact during shipping can occasionally alter it.
