Glow Plug Failure Analysis
The following are examples of glow plug failure. Each example gives a different clue to glow plug failure analysis.
- There is no visible damage, but glow plug is electrically open See Fig 1. This indicates an internal heating element failure.
- Glow plug tip that is missing can be caused by incorrect timing or poor fuel quality See Fig 2.
- Multiple, distorted glow plugs are usually caused by electrical overheating See Fig 3. A complete evaluation of the glow plug control system should be made.