BrianAtSmarty
SmartyResource
- Joined
- Aug 13, 2012
- Messages
- 432
Why should we avoid using remanufactured injectors?
Lets scrutinize the examples of higher mileage injectors that are sent in for remanufacture!
What do we normally find in examples of old used injectors?
Particle contamination causing:
- 1. Wear at the nozzle guidance causing leakage, a higher friction between nozzle needle and nozzle body, bad starting performance and reduced injection quantity at lower rail pressures.
- 2. Abrasive wear at the valve seat causing leakage (bad starting performance and higher injection quantity) and leakage is causing a later pressure build up to close the nozzle needle.
-
3. Wear at the valve piston (similar failure consequences as a worn nozzle guidance).
Fuel deposits causing a sticking armature group.
Water contamination causing corrosion with the result of sticking armature group or cracks of a valve piece or injector body caused by corrosion marks making the material weak.
Extruded high pressure sealing ring (only on injectors with manufacturing date 2003-2005)
Cracked injector body because of higher than standard rail pressure.
The reason to not use remanufactured injectors is simple, because only failed parts and the nozzle get replaced when the injector gets repaired. All other parts of the injector will remain. So a reman injector has wear already on its internal parts and will never reach the same running time or will it function like a new injector. (that is in the case of using a Bosch reman injector with the number 0986xxxxxx)
We have examined thousands of sets of injectors which were destined for remanufacturing. Very often there were injector sets with a single remanufactured injector in it which was primarily the one in the set which didn´t work anymore.
Evidence shows that most companies attempting to remanufacture CR injectors appear to not have the knowledge to remanufacture injectors properly. They are trying to finish the sealing surfaces between the nozzle and the injector body. These surfaces originally have a concave shape which they wrongly remove. That also effects the nozzle needle lift by the material they remove in the grinding process and they do not adjust it afterwards. Very often the armature lift gets no adjustment or they simply get dirt into the injector…. and so on. The list of issues caused by these remanufacturers is long.
Lets scrutinize the examples of higher mileage injectors that are sent in for remanufacture!
What do we normally find in examples of old used injectors?
Particle contamination causing:
- 1. Wear at the nozzle guidance causing leakage, a higher friction between nozzle needle and nozzle body, bad starting performance and reduced injection quantity at lower rail pressures.
- 2. Abrasive wear at the valve seat causing leakage (bad starting performance and higher injection quantity) and leakage is causing a later pressure build up to close the nozzle needle.
-
3. Wear at the valve piston (similar failure consequences as a worn nozzle guidance).
Fuel deposits causing a sticking armature group.
Water contamination causing corrosion with the result of sticking armature group or cracks of a valve piece or injector body caused by corrosion marks making the material weak.
Extruded high pressure sealing ring (only on injectors with manufacturing date 2003-2005)
Cracked injector body because of higher than standard rail pressure.
The reason to not use remanufactured injectors is simple, because only failed parts and the nozzle get replaced when the injector gets repaired. All other parts of the injector will remain. So a reman injector has wear already on its internal parts and will never reach the same running time or will it function like a new injector. (that is in the case of using a Bosch reman injector with the number 0986xxxxxx)
We have examined thousands of sets of injectors which were destined for remanufacturing. Very often there were injector sets with a single remanufactured injector in it which was primarily the one in the set which didn´t work anymore.
Evidence shows that most companies attempting to remanufacture CR injectors appear to not have the knowledge to remanufacture injectors properly. They are trying to finish the sealing surfaces between the nozzle and the injector body. These surfaces originally have a concave shape which they wrongly remove. That also effects the nozzle needle lift by the material they remove in the grinding process and they do not adjust it afterwards. Very often the armature lift gets no adjustment or they simply get dirt into the injector…. and so on. The list of issues caused by these remanufacturers is long.
opcorn:
