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DENSO Glow Plug - DG-655

DENSO Glow Plug - DG-655

Ensure reliable engine starts with the DENSO Glow Plug (DG-655). Designed to meet or exceed origin...

Best current price£18.19from eBay

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eBayDENSO , GLOW PLUG DG-655 FOR MITSUBISHI 2.5 L 200 / TRITON (05-15)
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£18.19
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My Motor WorldDenso Dg-655 Glow Plug (Single)
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£20.99
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Product Information

Full details

The DENSO Glow Plug (DG-655) is designed for diesel engine owners who require reliable, cold-weather ignition performance that meets or exceeds original equipment (OE) standards. Built for durability and precise heat generation, this double-coil glow plug ensures your engine starts consistently in challenging environments. While it is engineered for high performance, users must note that improper installation torque can damage the threads, making it essential to use a torque wrench during replacement to avoid costly cylinder head repairs.

All features

Model Part NumberDG-655
BrandDENSO

Extended Product Information

FAQs

Does the DG-655 come in a set or as a single unit?

This listing is for a single glow plug unit.

What is the correct tightening torque?

The tightening torque must be strictly controlled between 10-12 Nm.

Can I use this for non-compatible vehicles if the thread size matches?

No, you must match the plug to the OEM reference 1820A009, as heat range and protrusion length are critical for engine health.

Do I need to gap these glow plugs?

No, glow plugs are not gapped like spark plugs. They are ready to install out of the box.

How often should I replace my glow plugs?

Glow plugs do not have a set mileage interval but should be replaced if you experience hard starting, rough idling, or if a diagnostic test shows high resistance.

Troubleshooting

Engine continues to struggle with cold starts after replacement

Check the glow plug relay or control module to ensure they are providing the correct voltage to the plugs.

Difficulty removing the old glow plug

Apply a penetrating oil to the base of the plug and allow it to soak for several hours before attempting removal.

Dashboard warning light remains on

Clear the engine diagnostic codes with an OBDII scanner after ensuring all new plugs are properly seated and connected.

Pros and Cons

Pros

  • Reliable cold-start performance
  • Meets or exceeds OE standards
  • Durable double-coil construction
  • Precise fit for compatible vehicle applications

Cons

  • Sensitive to over-tightening during installation
  • Requires verification of specific OEM part numbers
  • Professional installation recommended for some vehicle layouts

Setup, Compatibility & Care

To ensure success with the DG-655, you must first verify your vehicle's compatibility against OEM reference 1820A009. Installation requires a 12mm spanner and a torque wrench set specifically to the 10-12 Nm range. Exceeding this torque specification can strip the cylinder head threads or snap the plug housing. Care should be taken to clean the glow plug port of carbon buildup before inserting the new unit to ensure proper thermal conductivity. Always disconnect the negative battery terminal before beginning work to prevent accidental short circuits.

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