Why do diesel engines need glow plugs? Glow plugs are essential components in diesel engines, especially for starting the engine in cold weather. This video explains how glow plugs work, their role in preheating the combustion chamber, and why they are crucial for efficient engine performance. Learn about the different types of glow plugs, signs that they need replacement, and how they contribute to reducing emissions and improving fuel efficiency. A must-watch for anyone interested in the mecha