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Glow Plugs Set 4x - DENSO - DG-625

Glow Plugs Set 4x - DENSO - DG-625

Ensure optimal engine starting performance with this set of 4 premium DENSO glow plugs. Designed f...

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eBayDENSO , GLOW PLUG DG-625 FOR VAUXHALL 1.7 MOKKA (12-)
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My Motor WorldDenso Dg-625 Glow Plug (Single)
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Product Information

Full details

This DENSO DG-625 glow plug set is designed for diesel vehicle owners looking to restore reliable ignition and improve cold-weather starting performance. These premium 4.4V glow plugs utilize instant-heating technology to minimize wait times before engine turnover, making them an ideal replacement for worn-out OEM components; however, users must verify engine compatibility and torque specifications specifically for their vehicle to ensure proper seating and prevent cylinder head damage.

All features

Model Part NumberDG-625
BrandDenso

Extended Product Information

FAQs

Can I use these in a 12V diesel engine?

No. These are 4.4V glow plugs. Installing them in a 12V system will cause immediate failure.

How many plugs are included in the set?

This package contains four (4) individual glow plugs.

Are these compatible with all diesel engines?

No. Please verify compatibility with OE numbers 1214067 and 55567737 before purchase.

Should I apply grease to the threads?

Use a specialized high-temperature anti-seize compound on the threads to ensure easy removal in the future.

What is the correct socket size for installation?

You will need a 10mm socket to install these plugs.

Troubleshooting

Engine continues to struggle with cold starts after installation

Check the glow plug control module or relay to ensure it is supplying power to the plugs.

Dashboard indicator light remains off

Verify the electrical connection to the glow plug harness is secure and that the fuse associated with the glow plug circuit is not blown.

Difficult removal of old glow plugs

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

Pros and Cons

Pros

  • Rapid heating performance in cold conditions
  • Direct fit replacement for specified OE numbers
  • High-grade materials ensure long-term thermal stability
  • Set of four provides a complete replacement for standard 4-cylinder engines

Cons

  • Not compatible with 12V or 24V ignition systems
  • Requires specific torque tools for safe installation
  • Potential for seizure in cylinder heads if removed improperly

Setup, Compatibility & Care

To install, first ensure the engine is completely cool to avoid thermal shock or personal injury. Remove the electrical connection to the existing glow plugs, then use a 10mm deep-well socket to carefully unscrew the old units. It is highly recommended to apply a small amount of high-temperature anti-seize compound to the threads of the new DG-625 plugs before insertion. Tighten according to the vehicle manufacturer’s specific torque settings. Always check the electrical relay to ensure it is delivering the correct 4.4V current, as faulty relays can destroy new plugs. Keep the terminals clean and free of corrosion to maintain optimal current flow.

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