Motor craft Diesel Glow Plug Diesel engine performing at its best with this part. Combining 2-spiral technology with premium insulation this product ensures even glow and trouble-free performance. Motor craft diesel glow plugs are made of premium materials and tested to withstand corrosion. Features: - Designed for each application- Recommended by Ford Motor Company- 2-spiral technology combined with premium insulation for even glow and reliable performance- Made of quality materials- Tested to withstand corrosion- Regulating and heating coils are designed for the fast heat-up of the glow tube- Conical seat ensures a positive seal with the combustion chamber- Threads are designed for strength and plated to prevent seizure- Connectors ensure precise fit and easy installation In diesel engines ignition is achieved during the engines compression stroke. When the air/fuel mixture in the cylinder is compressed its temperature rises to the point of ignition. Since the engine uses air temperature to cause ignition there is no need for a spark plug. When the engine block is cold the metal may absorb the heat generated by compression and prevent ignition. For this reason many diesel engines contain glow plugs. Glow plugs have a metal tip that transfers heat from a heating element to the cylinders. Once the cylinders are warm enough the glow plugs are switched off and the engine is able to start. Motor craft offers you quality diesel glow plugs that are engineered specifically for your Ford Power Stroke? Diesel engine. They combine 2-spiral technology with premium insulation to provide even glow and reliable performance. Built of quality materials Motor craft diesel glow plugs are tested to withstand corrosion and last at least 10 000 cycles. The conical seat ensures a positive seal with the combustion chamber while the connectors make for precise fit and easy installation.