DENSO Glow Plug - DG-157
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eBayDENSO , GLOW PLUG DG-157 FOR NISSAN 3.2 PATROL (79-88)
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Product Information
Full details
The DENSO DG-157 Glow Plug is designed for automotive technicians and vehicle owners looking for a high-quality, reliable replacement part that meets exact OEM standards. Its primary benefit is providing consistent, efficient engine starting even in cold weather conditions through advanced double-coil technology. However, users should be aware that this specific component is designed for systems requiring an 11V power input, and incorrect voltage matching can lead to premature failure or ignition issues.
All features
| Model Part Number | DG-157 |
|---|---|
| Brand | DENSO |
Extended Product Information
FAQs
Can I use the DG-157 in a 12V system?
The DG-157 is rated for 11V. While it may function in some 12V systems, it is designed for an 11V regulated environment to prevent overheating and burnout.
How do I know if my glow plugs need replacing?
Common signs include difficulty starting in cold weather, excessive white smoke during startup, or an engine that idles roughly for a few minutes after starting.
Should I replace all glow plugs at once?
Yes, it is highly recommended to replace all glow plugs as a set to ensure balanced resistance and uniform heating performance across all cylinders.
What is the thread pitch for this model?
The DG-157 utilizes an M10x1.25 thread.
Does this product require any special tools for installation?
You will need a torque wrench and a deep-well spark plug or glow plug socket to ensure the component is installed to the manufacturer's recommended torque specifications.
Troubleshooting
Engine fails to start in cold conditions
Test the electrical resistance of each glow plug using a multimeter; if the resistance is out of specification, replace the faulty unit.
Hard starting despite new glow plugs
Check the glow plug relay or control module to ensure power is actually reaching the plugs during the pre-heat cycle.
Difficulty threading the plug into the cylinder head
Stop immediately, clean the cylinder head threads with a chaser tool, and ensure you are using the correct M10x1.25 thread size.
Pros and Cons
Pros
- Meets or exceeds OEM performance standards
- Double-coil design ensures faster heat-up times
- High thermal resistance for long service life
- Consistent and reliable cold-weather starting
Cons
- Limited to 11V electrical systems
- Requires mechanical expertise for safe installation
- Not compatible with glow plug systems requiring different thread pitches
Setup, Compatibility & Care
Installation requires removing the existing glow plug from the cylinder head using an appropriate deep-well socket, taking care not to cross-thread the new M10x1.25 unit. Ensure the engine block is cool before beginning the replacement to avoid burns and to prevent potential damage to the cylinder head threads. Once installed, ensure the electrical connector is firmly seated and free from corrosion to prevent high resistance. Routine care involves inspecting the electrical harness annually for frayed wires or oxidation, as these issues can cause the glow plug to underperform despite the component being in good condition.