What is the replacement interval for EA211 spark plugs?
1 Answers
Typically, the service life of a standard spark plug is 15,000 km, while long-life spark plugs can last up to 30,000 km. Different vehicle manufacturers specify varying maintenance intervals, so the actual replacement cycle should follow the automaker's recommendations. Below is relevant information: 1. Spark plugs (spark-plugs), commonly known as sparking plugs, function by discharging high-voltage pulses sent through the ignition wire, creating an electric arc between the electrodes to ignite the air-fuel mixture in the combustion chamber. Fundamental requirements for high-performance engines include: stable high-energy sparks, uniformly mixed air-fuel mixture, and high compression ratio. 2. The spark plug insulator skirt (the conical insulating portion surrounding the center electrode) directly contacts high-temperature gases in the combustion chamber, absorbing substantial heat. This absorbed heat is dissipated through the spark plug shell to both the cylinder head and atmosphere. Research indicates that proper engine operation requires the insulator skirt to maintain 500-600°C (known as the self-cleaning temperature). Below this threshold, carbon deposits form on the skirt, causing electrode leakage and affecting spark performance. Conversely, if insulator temperatures exceed 900°C, premature ignition may occur when the mixture contacts this overheated surface, leading to engine knocking. Normal operating temperatures for spark plugs range between 450-870°C, during which they exhibit a tan coloration. Persistent operation below 450°C results in excessive carbon buildup around the plug, turning it black.
