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Glow Plugs

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NGK Glow Plugs

Glow plugs are used in diesel vehicles as an ignition component to aid the starting of the engine. Unlike petrol engines, diesel engines do not use spark plugs for combustion instead they rely on heat from highly compressed air to initiate combustion.

Glow plugs help heat up the engine cylinders, warming the engine block and aiding the spontaneous combustion of the diesel. Whereas older glow plugs required a long pre-heating “wait to start” period, more modern diesel cars start much quicker.

Signs that a glow plug needs replacing include:

  • Poor starting performance
  • Excessive cranking required
  • Rough idling
  • Excessive exhaust emissions on start-up
Although we sell glow plugs individually we do recommend changing all glow plugs at the same time. We stock a full range of Bosch glow plugs as well as glowplugs from NGK and Denso. Our high quality glow plugs offer excellent cold start performance as well as high durability and corrosion resistance.

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