How to Remove the Spark Plug of Lavida?
3 Answers
The method to remove the spark plug of Lavida is as follows: 1. Locate the position of the spark plug and unplug the electrical connector. 2. Use a wrench or socket to loosen and remove the screw, then gently pull out the spark plug and its contactor. 3. Loosen the spark plug with a socket, use a rubber sleeve to grip the spark plug, and pull it upward to remove it. More information about spark plugs is as follows: 1. The spark plug is a crucial component of the gasoline engine's ignition system. It introduces high voltage into the combustion chamber and generates a spark across the electrode gap to ignite the combustible mixture in the cylinder. It mainly consists of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell, with the side electrode welded to the shell. 2. The thermal value in spark plug standards typically characterizes the thermal properties of the spark plug. The thermal value indicates the balance between heat absorption and dissipation of the spark plug insulator skirt. A higher thermal value means better heat absorption and dissipation balance. Therefore, hot-type spark plugs have a lower thermal value, while cold-type spark plugs have a higher thermal value. Generally, high-power, high-compression engines use cold-type spark plugs with high thermal values; conversely, low-power, low-compression engines use hot-type spark plugs with low thermal values.
I've been repairing cars for over a decade. For the Lavida's spark plugs, it's best to work on a cold engine. First disconnect the ignition coil wiring harness connector - pinch the clip when pulling, don't yank it forcefully. Use a 10mm socket to remove the mounting bolt, then the ignition coil can be gently wiggled upward. At this point, use a dedicated spark plug socket wrench (16mm model works best), paired with an extension bar for better handling. Slowly turn counterclockwise with a ratchet wrench - the old spark plug will be held by the socket's rubber ring and come out. Remember to clean any debris from the well afterward to prevent dirt from falling into the cylinder. Before installing new spark plugs, check the electrode gap - 0.8-0.9mm is ideal. The tightening feel is crucial - first hand-tighten, then give just half a turn with the wrench. Last time I saw a rookie use excessive force and cracked the ceramic insulator, causing electrical leakage.
To do a good job, one must first sharpen one's tools. Preparing a 16mm magnetic spark plug socket and a torque wrench is crucial. The four spark plugs of the Lavida EA211 engine are hidden beneath the ignition coils. First, disconnect the negative terminal of the battery to prevent accidental contact, and pay attention to the clip positions when removing the coil wires. The removal and installation should follow a diagonal sequence—replace each spark plug immediately after removal to prevent dust from entering the combustion chamber. The installation torque should be controlled at around 25 N·m, and the torque wrench can prevent thread damage. Wear safety goggles during the operation, as old spark plugs may carry fine carbon deposits. After completion, don’t rush to put away the tools; first, start the engine and listen for smooth operation—any misfiring sound may indicate a possible air leak.
