Categories: Diesel Injector ProblemDiesel Injector Repair

Essential Injector Repair Parameters for Bosch, Denso, Cummins, and Caterpillar

essential injector repair parameters for bosch, denso, cummins, and caterpillar

Injector repair parameters involve several critical technical specifications that are essential for ensuring the performance and accuracy of fuel injection. Here are some common injector repair parameters:

  • Solenoid valve nut tightening torque
  • Control valve nut tightening torque
  • Injector nozzle nut tightening torque
  • Armature stroke
  • Buffer stroke
  • Nozzle needle stroke
  • Solenoid valve spring preload

Precise control of these parameters is key to ensuring proper injector operation and optimal engine performance. When repairing injectors, specialized tools should be used, and operations should strictly adhere to these parameters to maintain injector performance and longevity.

Below are the repair parameters for Bosch, Denso, Cummins, and Caterpillar injectors for your reference.

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CRIN1 Bosch First Generation Injector Repair Parameters
>Solenoid Valve Nut Tightening Torque: 30 ± 5 Nm
>Control Valve Nut Tightening Torque: 65 ± 5 Nm
>Injector Nozzle Nut Tightening Torque: 65 ± 5 Nm
>Armature Stroke: 50 ± 3 microns
>Buffer Stroke: 35 ± 5 microns
>Remaining Air Gap Stroke: 45 ± 5 microns
>Nozzle Needle Stroke: 200-300 microns (depending on the model)
CRIN2 Bosch Second Generation Injector Repair Parameters
>Solenoid Valve Nut Tightening Torque: 30 ± 5 Nm
>Control Valve Nut Tightening Torque: 65 ± 5 Nm
>Injector Nozzle Nut Tightening Torque: 65 ± 5 Nm
>Armature Stroke: 52 ± 3 microns
>Buffer Stroke: 40 ± 5 microns
>Remaining Air Gap Stroke: 45 ± 2 microns (no adjustment needed, for inspection only)
>Nozzle Needle Stroke: 200-320 microns (depending on the model)
CRIN3 Bosch Third Generation Injector Repair Parameters
>Solenoid Valve Nut Tightening Torque: 30 ± 5 Nm
>Control Valve Nut Tightening Torque: 75 ± 5 Nm
>Injector Nozzle Nut Tightening Torque: 65 ± 5 Nm
>Armature Stroke: 52 ± 2 microns
>Buffer Stroke: 20 ± 5 microns
>Remaining Air Gap Stroke: 45 ± 5 microns (no adjustment needed, for inspection only)
>Nozzle Needle Stroke: 200-300 microns (depending on the model)
CRI Bosch Injector Repair Parameters
>Solenoid Valve Nut Tightening Torque: 30 ± 5 Nm
>Control Valve Nut Tightening Torque: 50 ± 5 Nm
>Injector Nozzle Nut Tightening Torque: 55 ± 5 Nm
>Armature Stroke: 42 ± 3 microns
>Buffer Stroke: 30 ± 5 microns
>Remaining Air Gap Stroke: (National III 45 ± 5 microns) (National IV 30 ± 5 microns)
>Nozzle Needle Stroke: 850-900 microns (depending on the model)
Cummins Injector Repair Parameters
>Solenoid Valve Nut Tightening Torque: 12-16 Nm
>Control Valve Nut Tightening Torque: 70 ± 5 Nm
>Injector Nozzle Nut Tightening Torque: 65 ± 5 Nm
>Armature Stroke: 40 ± 3 microns
>Remaining Air Gap Stroke: 70-75 microns (no adjustment needed, for inspection only)
>Nozzle Needle Stroke: 300 ± 20 microns (depending on the model)
Denso G2 Injector Repair Parameters
>Solenoid Valve Nut Tightening Torque: 30 ± 5 Nm
>Control Valve Nut Tightening Torque: 70 ± 5 Nm
>Injector Nozzle NutTightening Torque:
(M:14: 65 ± 5 Nm)
(M19: 75 ± 5 Nm)
>Armature Stroke: 60 ± 5 microns
>Remaining Air Gap Stroke: 45-50 microns (no adjustment needed, for inspection only)
>Nozzle Needle Stroke: 350 ± 20 microns (no adjustment needed, for inspection only)
Caterpillar 320D Injector Repair Parameters
>Solenoid Valve Nut Tightening Torque: 30 ± 5 Nm
>Control Valve Nut Tightening Torque:
(Made in China Valve 45 ± 5 Nm)
(Original Valve 65 ± 5 Nm)
>Injector Nozzle Nut Tightening Torque: 55 ± 5 Nm
>Armature Stroke: 50 ± 2 microns
>Remaining Air Gap Stroke: 35-40 microns
>Nozzle Needle Stroke: 300 ± 10 microns

Toni Tao

Hi, I’m Toni Tao, a manager at ERIKC Diesel. I have more than 10 years of experience and focus on providing quality diesel parts and great service to customers worldwide.

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Toni Tao
2 months ago

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