Glow plugs
Destroyed/lacking probe tip
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
Remedy:
- Check the correspondence of ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling.
Dimples on the probe tip
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
Remedy:
- Check the correspondence of ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling.
Broken probe tip
Cause:
- Glowing time too long or voltage too high (12-V glow plug used in the 24-V system or vice versa).
- Alternator & regulator failure.
Remedy:
- Check glow plug regulator (contacts).
- Check on-board voltage and glow plug voltage.
- Check charging system voltage.
“Swollen” probe tip
Cause:
- Excessive voltage (12-V glow plug used in the 24-V system or vice versa)
- Alternator & regulator failure.
- Inappropriate storage (moisture).
Remedy:
- Check on-board voltage and glow plug operation voltage.
- Check charging system.
- Check storage conditions.
Bulging ring on the probe tip
Cause:
- Oil in the combustion chamber (probable cause: car engine wear).
Remedy:
- Check piston tightness in engine cylinders.
- Check engine oil consumption.
Probe deformation (due to overheating)
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Glowing time too long or excessive voltage (12-V glow plug used in the 24-V system or vice versa)
- Alternator & regulator failure.
- Injection unit operation/timing failure.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling. Check glow plug regulator (contacts).
- Check on-board voltage and glow plug voltage.
- Check charging system voltage.
- Check fuel injection timing.
Lacking probe
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Injection unit operation/timing failure.
- Damaged glow plug installation hole thread in the cylinder head/not tightened glow plug causing incorrect plug seating.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check ignition pump timing.
Probe perforation, fissures or melting close to the glow plug body
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Injection unit operation/timing failure.
- Damaged glow plug installation hole thread in the cylinder head/not tightened glow plug causing incorrect plug seating.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check ignition pump timing.
Probe in contact with the glow plug body
Cause:
- Tightening torque too high.
- Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the cylinder head hole thread for damage/carbon fouling.
- Check correct glow plug tightening.
Carbon fouling between the plug body and the probe glow
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Ignition pump operation/timing failure.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for carbon fouling.
- Check ignition pump and its timing.
Carbon fouling in the glow plug seat
Cause:
- Incorrect glow plug seating.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug.
Damaged glow plug hexagon/thread
Cause:
- Tightening torque too high.
- Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug.
Power supply terminal bent
Cause:
- Tightening torque too high. Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug.
Power supply terminal broken off
Cause:
- Tightening torque too high.
- Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug
Destroyed/lacking probe tip
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
Remedy:
- Check the correspondence of ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling.
Dimples on the probe tip
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
Remedy:
- Check the correspondence of ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling.
Broken probe tip
Cause:
- Glowing time too long or voltage too high (12-V glow plug used in the 24-V system or vice versa).
- Alternator & regulator failure.
Remedy:
- Check glow plug regulator (contacts).
- Check on-board voltage and glow plug voltage.
- Check charging system voltage.
“Swollen” probe tip
Cause:
- Excessive voltage (12-V glow plug used in the 24-V system or vice versa)
- Alternator & regulator failure.
- Inappropriate storage (moisture).
Remedy:
- Check on-board voltage and glow plug operation voltage.
- Check charging system.
- Check storage conditions.
Bulging ring on the probe tip
Cause:
- Oil in the combustion chamber (probable cause: car engine wear).
Remedy:
- Check piston tightness in engine cylinders.
- Check engine oil consumption.
Probe deformation (due to overheating)
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Glowing time too long or excessive voltage (12-V glow plug used in the 24-V system or vice versa)
- Alternator & regulator failure.
- Injection unit operation/timing failure.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling. Check glow plug regulator (contacts).
- Check on-board voltage and glow plug voltage.
- Check charging system voltage.
- Check fuel injection timing.
Lacking probe
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Injection unit operation/timing failure.
- Damaged glow plug installation hole thread in the cylinder head/not tightened glow plug causing incorrect plug seating.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check ignition pump timing.
Probe perforation, fissures or melting close to the glow plug body
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Injection unit operation/timing failure.
- Damaged glow plug installation hole thread in the cylinder head/not tightened glow plug causing incorrect plug seating.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check ignition pump timing.
Probe in contact with the glow plug body
Cause:
- Tightening torque too high.
- Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the cylinder head hole thread for damage/carbon fouling.
- Check correct glow plug tightening.
Carbon fouling between the plug body and the probe glow
Cause:
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Ignition pump operation/timing failure.
Remedy:
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for carbon fouling.
- Check ignition pump and its timing.
Carbon fouling in the glow plug seat
Cause:
- Incorrect glow plug seating.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug.
Damaged glow plug hexagon/thread
Cause:
- Tightening torque too high.
- Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug.
Power supply terminal bent
Cause:
- Tightening torque too high. Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug.
Power supply terminal broken off
Cause:
- Tightening torque too high.
- Inappropriate tool used or damage of the cylinder head hole thread.
Remedy:
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check correct tightening of the glow plug