What’s wrong with my glow plug? (pt 6…)

Posted in glow plugs on February 21st, 2012 by admin

Heating Element Ruptured

Ruptured Glow Plugs

Cause:

  • Use of non-Duraterm glow plug in post-glow system

Effect:

  • Short circuit due to overheating
  • Tube may burst or split

Corrective Action:

  • replace with Bosch quality glow plugs
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What’s wrong with my glow plug? (pt 5…)

Posted in glow plugs on February 2nd, 2012 by admin

What happened to my glow plugs this time?  Southwest Diesel has come across another unfortunate glow plug issue.

Terminal stud damaged

The stud is damaged.

Cause:

  • Excessive terminal-nut tightening torque
  • Use of incorrect wrench

Effect:

  • Terminal stud shears off, damage to hexagon, short circuit.

Corrective:

  • Use appropriate torque wrench
  • Torque glow plug according to specifications
  • Replace with Bosch quality glow plugs from Southwest Diesel
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What’s wrong with my glow plug? (pt 4…)

Posted in Diesel, glow plugs, injection timing on January 25th, 2012 by admin

No glow-plug continuity

No glow-plug continuity

Cause:

  • Annular gap between plug shell and heating element constricted or blocked by carbon deposits and the regulating coil remains cold allowing excessive current to reach the heating coil.

Effect:

  • Break in heating wire, premature failure

Corrective Action:

  • Check injection system
  • Check/reset injection timing
  • Torque according to specifications
  • Replace if necessary

 

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What’s wrong with my glow plug?…. (pt 3)

Posted in glow plugs, heating element, injection timing on January 23rd, 2012 by admin

Heating element melted/broken off

Heating element broken off or meltedCause:

  • Incorrect injection timing
  • Carbon buildup on nozzles
  • Engine damage (due to valve damage, piston seizure, seized piston rings, etc.)
  • Leaking nozzles

Effect:

  • Glow plug casting overheats, melts, or breaks

Corrective Action:

  • Check injection system (i.e. nozzle-and-holder assembly)
  • Check/reset injection timing
  • Check for engine damage
  • Replace with Bosch quality glow plugs
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What’s wrong with my glow plugs? (pt 2…)

Posted in glow plugs, heating element on January 12th, 2012 by admin

Depressions in heating element

Depressions in heating element.Cause:

  • Operation with excessively high voltage, i.e. vehicle jump started
  • Excessively long energization (power supply/preheating relay)
  • Incorrect post-glow with running motor
  • Incorrect glow plug installed (no post-glow capability)
  • Increased alternator voltage

Effect:

  • Break in heating wire

Corrective Action:

  • Check pre-glow system
  • Replace preheating-time relay
  • Replace with Bosch quality glow plugs.

What’s wrong with my glow plugs? (an 8 post series)

Posted in glow plugs, heating element, injection timing, injector spray pattern on January 10th, 2012 by admin

Ceramic heating element brokenGlow plug with broken heating element

Cause:

  • Incorrect injection timing
  • incorrect injector spray pattern
  • Supply voltage too high (incorrect application)

Effect:

  • Ceramic heating element becomes too hot and breaks.

Corrective Action:

  • Check engine for oil consumption
  • Check control unit function
  • Check/reset injection timing
  • Replace with Bosch quality glow plugs
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