Should Spark Plugs Be Coated with Insulating Silicone Grease?
1 Answers
Spark plugs should be coated with insulating silicone grease. When applying the grease, it is crucial to apply it only to the white ceramic part and avoid the metal contact areas. The silicone grease serves to prevent scattered arcs, avoid tracking currents, prevent leakage and spark plug breakdown, extend the service life of the ignition coil rubber sleeve, and ensure ignition efficiency. Insulating silicone grease is a synthetic lubricant product with properties such as high-temperature resistance, aging resistance, ozone resistance, and hydrophobicity. It also offers excellent waterproofing, moisture resistance, and vacuum sealing capabilities, preventing dust and contaminants from entering sealed areas. If a spark plug shows cracks or leakage, applying insulating silicone grease will have limited effect, and it is recommended to replace the spark plug directly to avoid affecting engine performance.