Diesel Levante offers a wide range of glow plugs for almost all diesel cars of original brench mark as Bosch and Beru and its own aftermarket mark KNOERI. Our KNOERI glow plugs are manufactured to the highest standards and are of the highest quality.
The glow plug range has 200 part numbers and more than 7000 applications; this includes post-heating glow plugs, which offer superior starting performance, reduced emissions and longer service life.
Starting diesel engines
Diesel engines rely on the compression of gases to achieve combustio
This is fine in some conditions, however when the outdoor temperature is low, or the engine's cold, glow plugs are required to assist starting. Glow plugs reach temperatures of around 850°C and take a while to preheat the engine in readiness for combustio
Three phases heating system ( Pre-heat – heating during starting – post heating), means that the glow plug heats also up 180 seconds after starting, protecting the environment and the engine.
This unique post-heat process has dramatically reduced emissions, improved fuel economy and ensures smooth initial running of the engine even at low speeds.
This technology is available to all, with 90% coverage of all new vehicles. Every 75.000 at 100.000 Km. glow plugs should be tested or checked with a glow plug tester. This ensures reliable diesel starting also at low temperatures.
POSSIBLE DEFECTS OF GLOW PLUGS
Analisys
examples of the major causes of glow plug defects
long-term tests and experienced diesel engine experts have assisted us to acertain that the majority of glow plug defects is apparently due to external factors such as malfunction of components or other engine parts.
Main causes of breakdown:
1) SERVICE SYSTEMS
DEVICE
1.1 STARTER BOOSTER
DEFECT
EXCESSIVE VOLTAGE TO THE BATTERY
RESULT
GLOW PLUGS ARE SUBMITTED TO AN EXCESSIVE VOLTAGE CAUSING THE INTERRUPTION OF THE FILAMENT
2) DEFECTS OF ELECTRIC PARTS
ELECTRIC PART
2.1 RELAIS TEMPORIZZATORE
DEFECT
POWER SUPPLY
RESULT
GLOW PLUGS ARE IS NOT INTERRUPTED BEYOND THE ESTABLISHED TIMES CAUSING A SEVERE REDUCTION OF THEIR LIFESPAN
ELECTRIC PART
2.2 STARTER SWITCH
DEFECT
POWER SUPPLY
RESULT
GLOW PLUGS ARE IS NOT INTERRUPTED BEYOND THE ESTABLISHED TIMES CAUSING A SEVERE REDUCTION OF THEIR LIFESPAN
ELECTRIC PART
2.3 ALTERNATOR/REGULATOR
DEFECT
POWER SUPPLY
RESULT
INTERRUPTION OR REDUCED LIFESPAN
3) DEFECTS OF MECHANICAL PARTS
MECHANICAL PART
3.1 PRESSURE MEMBRANE OF POWER BRAKE
DEFECT
LOSS OF OIL
RESULT
INTAKE OF OIL INTO COMBUSTION CHAMBER
- GRADE OF SMOKE
- SCALE DEPOSIT
- REDUCED LIFESPAN OF GLOW PLUG
MECHANICAL PART
3.2 SCRAPER RING SEGMENTS
DEFECT
LOSS OF OIL
RESULT
INTAKE OF OIL INTO COMBUSTION CHAMBER
- GRADE OF SMOKE
- SCALE DEPOSIT
- REDUCED LIFESPAN OF GLOW PLUG
MECHANICAL PART
3.3 VALVE GUIDE
DEFECT
LOSS OF OIL
RESULT
INTAKE OF OIL INTO COMBUSTION CHAMBER
- GRADE OF SMOKE
- SCALE DEPOSIT
- REDUCED LIFESPAN OF GLOW PLUG
MECHANICAL PART
3.4 VALVOLE ‘EGR’
DEFECT
EXCESSIVE RECOVERY OF FUMES AND OIL
RESULT
INTAKE OF OIL INTO COMBUSTION CHAMBER
- GRADE OF SMOKE
- SCALE DEPOSIT
- REDUCED LIFESPAN OF GLOW PLUG
MECHANICAL PART
3.5 EXCESS OF OIL
DEFECT
EXCESSIVE OIL FUMES
RESULT
INTAKE OF OIL INTO COMBUSTION CHAMBER
- GRADE OF SMOKE
- SCALE DEPOSIT
- REDUCED LIFESPAN OF GLOW PLUG
TO CHECK THE PRESENCE OF OIL IN THE COMBUSTION CHAMBER, CONTROL IF THERE IS A LEAK OF LUBRICANT OF THE INDUCTION MANIFOLD OR THE SEAT OF THE AIR FILTER.
CHECK THE OIL LEVEL AND TEST THE CYLINDER COMPRESSION.
4) DEFECTS OF DIESEL INJECTION PARTS
PART
4.1 INJECTION PUMP
DEFECT
DETER IORATED FUEL SUPPLY
RESULT
GRADE OF SMOKE, TOO HIGH TEMPERATURE IN THE COMBUSTION CHAMBER SCALE DEPOSIT ON THE RESISTANCE
PART
4.2 INJECTOR
DEFECT
FUEL NOT SPRAYED
RESULT
GRADE OF SMOKE, SCALE SCALE DEPOSIT ON THE RESISTANCE
Control:
· remove, clean and check the injectors
· fit the new glow plugs
· power the glow plugs by turning the ignition key into position pre-heating
· check the correct heating time of the glow plugs
· reassemble the injectors
· start the engine and control the pump stroke, adjust pump stroke if necessary
· analize the exhaust fumes with a proper control device (opacimeter) . values exceeding the pre-established parameters given by the car manufacturer, prove an excessive presence of oil in the combustion chamber.
in this case there will be a deposit of oil on the glow plugs, caused by the fuel turbulence also in the prechambers, where the glow plugs are located. as a consequence the tbe will not be able to dissipate the heat of the filament during the pre-heating stages and as a result of repeated overheating inside, the performance will be gradually reduced until breakdown.
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