Glow Plugs

Glow plugs heat diesel engines before combustion, easing cold starts and smooth running. This Glow Plugs category includes metal and ceramic options in common sizes such as 12mm, 14mm, and 18mm to fit a wide range of engines and cylinder heads. They are built for durability, resisting vibration and heat cycling in demanding climates.

Key features vary by design: metal plugs often use copper cores for fast heat transfer and reliable ignition, while ceramic plugs combine robust insulation with longer life and higher temp tolerance. Several variants use different heat ranges to match a given engine's preheat profile, helping reduce start-up misfires and improve idle stability.

Buying considerations include engine compatibility (thread size and overall length), heat range, and material choice. Check OEM specs or cross-reference guides to ensure correct fit. For sourcing, The Green Spark Plug Company offers NGK glow plugs for many applications: The Green Spark Plug Company.