Shop Glow Plug essentials. Find Block heater plug & Plugging in block heater. Explore Plug in heater options. Get Glow plug diesel solutions. Ensuring your vehicle's glow plugs are properly maintained is crucial for a smooth start in cold conditions. Over time, worn-out glow plugs may cause hard starting or engine misfires; these are clear indicators that replacements are needed. When selecting new glow plugs, opt for high-quality materials like durable alloys for longevity and optimal performance. With a range of ceramic and metal glow plugs available, each offering unique heat-up times and longevity features, it's important to choose ones that match your engine's specifications. Remember to follow the manufacturer's guidelines for installation to ensure efficient operation and prevent damage to your engine.