Are there different types of spark plugs for the Teana?
3 Answers
Teana spark plugs do not have different types; they all use the original NGK iridium-platinum spark plug, model DILKAR6A11. The main types of spark plugs are: standard spark plugs, extended insulator spark plugs, electrode spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-gap spark plugs. How spark plugs work: The spark plug's ground electrode is connected to the metal shell, which is threaded into the engine block via the cylinder head. The insulator primarily serves to isolate the metal shell from the center electrode. The terminal nut is the part of the spark plug that contacts the high-voltage coil. When current passes through the terminal nut and the center electrode, it ionizes the medium between the center electrode and the ground electrode, generating a spark to ignite the air-fuel mixture in the cylinder. Spark plug replacement intervals: Under normal maintenance conditions, they should be replaced every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine, so it is recommended to follow the owner's manual. The following standards can be used as a reference for maintenance replacement: Platinum spark plugs should be replaced every 40,000 km, ordinary nickel alloy spark plugs every 20,000 km, and iridium spark plugs every 60,000 to 80,000 km.
Speaking of the classification of Teana spark plugs, I've owned a Teana for many years and replaced them several times. There are indeed different types. The most basic are nickel alloy spark plugs, which are cheap and easy to replace, with a lifespan of about 20,000 to 30,000 kilometers. The upgraded version is the iridium spark plugs, which provide more stable ignition and smoother engine performance, lasting up to 80,000 kilometers. Although they are more expensive, they are cost-effective in the long run. The Teana engine comes in 2.0L and 2.5L variants, and different model years require spark plugs with matching heat ranges. Choose heat range 6 for high-speed driving and 7 for city driving. I recommend purchasing according to the original manual or the recommendations of the 4S shop to avoid poor-quality products that may cause starting difficulties. When replacing, go to a professional shop to ensure the tightening torque is appropriate—don’t skimp on costs. Regular checks can maintain engine health. My experience is that the iridium version offers noticeable improvements, but avoid unnecessary modifications.
In the automotive repair industry, I've come across many Altimas, and spark plugs are primarily categorized by material and design. Standard nickel alloy spark plugs are low-cost but wear out easily, making them suitable for budget-conscious owners. Iridium or platinum plugs offer superior durability and efficient ignition, improving fuel economy and acceleration performance. For Altima engines like the L4 type, specific heat range spark plug models such as NGK BKR5E or Denso IX series are required – incorrect heat ranges can cause knocking (if too high) or misfires (if too low). Replacement is recommended every 30,000 to 50,000 km. I've measured the gap with a multimeter, and around 0.8mm is ideal. During installation, ensure electrodes are clean and free from oil contamination, and prioritize OEM parts over cheaper alternatives. Choosing the right spark plugs protects engine longevity, and even beginners can attempt this straightforward replacement.
