F00041N038 Diesel Common Rail Injector Repair Kit — High-Pressure Seal & Gasket Rebuild Set

 

A single ageing thrust ring inside a Bosch CR injector can push return fuel flow past 250 ml/min - silently dragging down fuel efficiency, elevating exhaust temperatures, and triggering unnecessary DPF regenerations. The F00041N038 Injector Repair Kit targets precisely that failure mode. It delivers a full complement of sealing elements and adjustment shims that restore hydraulic integrity without replacing the entire injector body or solenoid.

FKM (Viton) elastomers are used throughout, rated for continuous operation at 200 °C and compatible with EN 590 diesel as well as B20/B30 biodiesel blends. The thrust ring employs a trapezoidal cross‑section that self‑centers under torque, eliminating the need for supplementary thread sealant.

 

0414701016

0414701018

0414701026

These injectors share an identical nozzle nut thread (M22 × 0.75 mm) and the same internal leak‑off passage diameter. They are widely found on medium‑ and heavy‑duty diesel platforms managed by Bosch EDC16/EDC17 engine control units. Whether you are servicing an industrial power unit, a marine auxiliary, or a commercial vehicle application, the F00041N038 kit covers all three variants without the need to stock separate seal sets. Always verify the part number engraved on the injector solenoid cap before ordering - the kit directly services 0414701016, 0414701018, and 0414701026.

 

On the high‑pressure side, the copper crush washer is annealed to a controlled hardness of 45–55 HV. This allows it to conform to micro‑irregularities on the nozzle seat without extruding at peak line pressures of 1,800 bar (with transient overshoots up to 2,100 bar). The result is a measurable drop in leak‑off volume: field tests on a 0414701026 injector that initially returned 215 ml/min showed a post‑rebuild return of under 14 ml/min when tested on a Bosch EPS 815 test bench at 1,600 bar rail pressure.

 

With the F00041N038 repair kit, a workshop can rebuild all three supported injector variants - 0414701016, 0414701018, 0414701026 - using one SKU, cutting shelf complexity and speeding turnaround.

 

Q1: How do I know whether my injector is a 0414701016, 0414701018, or 0414701026?
The part number is laser‑etched on the flat surface of the solenoid cap. Remove the connector and clean the area to read it. All three share the same external dimensions, so visual identification alone is unreliable.

Q2: Can the F00041N038 kit be used on an injector that has already been remanufactured once?
Yes, provided the nozzle needle guide and solenoid armature are unworn. The seal cavities do not change dimensions after one rebuild, so the kit seats correctly. Always test for nozzle chatter and solenoid response before resealing.

Q3: What makes the FKM seals in this repair kit different from standard Viton?
This formulation includes a minor percentage of perfluoro‑elastomer filler, which reduces volume swell in biodiesel by approximately 15 % compared to off‑the‑shelf FKM. It maintains cross‑sectional integrity even during cold‑weather operation with B20.

Q4: Does the kit include the small sealing washer for the return line connector?
Yes. A dedicated 9.8 mm × 1.5 mm FKM return line seal is included. Many generic kits skip this washer, but a leak at the return connector can produce an external fuel weep that mimics a high‑pressure sealing fault.

Q5: Why does the thrust ring design matter for nozzle protrusion?
The thickness of the thrust ring directly controls how far the nozzle tip protrudes into the combustion chamber. The F00041N038 ring maintains protrusion within the OEM‑defined window, preventing flame impingement and piston crown damage.

Q6: After installing the F00041N038 repair kit, is it necessary to recode the injector in the ECU?
If the same injector body is reinstalled, the original IMA (injector‑specific adjustment) code remains valid because the solenoid and hydraulic flow characteristic are unchanged. Only when swapping the complete injector does recalibration become necessary.

 

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