Why is there smoke coming out of my spark plug?
Why is there smoke coming out of my spark plug? This is because the "umbrella" seals used on the valves don't last very long. This allows small amounts of oil to leak past the valves and into the cylinders. When you start the engine, you get smoke until the oil burns off. It could be this oil smoke is leaking from your exhaust manifold. Is there smoke coming out of my spark plug? Car use to smoke in mornings, warms up and goes away. Then for a week now, smoke nonstop. I checked the first left spark plug, took it...