Glow Plugs

Reliable Start-up for Diesel Engines

NGK glow plugs must perform well even under the worst of conditions. Diesel car drivers and automobile manufacturers value and appreciate NGK SPARK PLUG’s expertise around the world.

Many years of glow plug experience

> 260 part numbers available for European markets

86% coverage of vehicles in operation in Europe (source: TecDoc)

80 D-Power* part numbers for faster stock rotation *available in some markets only

NGK Glow Plug Technologies

NGK glow plugs are setting new standards in glow plug technology.
Under a certain temperature, the engine will not start without well-performing glow plugs. Therefore, glow plugs are mandatory to ensure a perfect engine start, especially in cold conditions. This is why NGK SPARK PLUG is constantly expanding its expertise.

There are two glow plug types: metal rod glow plugs and ceramic glow plugs. The two technologies have special characteristics in regard to thermal behavior.

Many car manufacturers are not prepared to compromise on the quality and performance of their diesel glow plugs. This is why they choose the proven NGK technology.

Safe start-up from low ambient temperatures
Low emissions during warm-up phase
Stable idling running before engine reaches operating temperature
High-quality coating on shell for high resistance to corrosion
Unique shell design for excellent heat transfer
Perfect gas-tight sealing
High shear torque
High resistance to deformation and security of the heating coils

Glow Plug Requirements

Glow plugs need to perform well under extremely harsh conditions.
The self-ignition process must be reached even when cold or frost starting. This is why additonal heat must be introduced to the combustion chamber. NGK glow plugs master this process of pre-glowing perfectly. In that sense, the glow plug functions like an immersion heater. It is introducing electrical energy and heating it up to extremely high temperatures of up to 1350°C.

Read why Diesel engines will remain important