F00041N040 Diesel Common Rail Injector Sealing & Calibration Kit — Complete Elastomer & Crush Element Restoration

 

Every cold‑start cycle pushes the internal O‑rings of a Bosch CR injector through a thermal swing exceeding 150 °C within 60 seconds. After roughly 3,000 cycles, standard NBR seals surrender up to 40 % of their radial compression - a silent leak path that bleeds rail pressure into the return gallery, adds minutes to hot‑start cranking, and raises the frequency of active DPF regenerations. The F00041N040 Injector Repair Kit replaces every fatigue‑prone sealing element and crush washer with dimensionally stabilized FKM elastomers and controlled‑hardness copper components. It addresses the hydraulic root cause before the ECU even logs a fault code, covering four high‑volume Bosch injector part numbers with a single SKU.

 

‣ FKM body O‑rings (Ø7.6×1.8 mm / Ø14.0×2.0 mm / Ø18.5×1.5 mm) – formulated with a perfluoro‑elastomer filler that limits volume swell in biodiesel blends below 8 %, compared to 18 % for generic nitrile. Operating window is −35 °C to +200 °C.
‣ Copper crush thrust ring – annealed to a Vickers hardness of 45–55 HV and finished to Ra 0.7 µm, allowing it to mirror the nozzle seat micro‑profile under 1,800 bar without extruding.
‣ Combustion seal washer – bi‑metallic configuration with a pre‑calculated collapse stroke of 0.12 mm, maintaining nozzle protrusion within the OEM‑specified band.

A full set of adjustment shims (0.90 mm → 1.30 mm, 0.02 mm increments) is included, together with the nozzle‑retaining‑nut gasket and the small return‑line connector seal that generic kits frequently omit.

 

0414701035

0414701060

0414701068

0414701069

These units appear on mid‑displacement commercial and off‑highway diesel platforms controlled by EDC16/EDC17 ECUs - including Deutz, Volvo Penta, and Iveco applications. Regardless of whether the solenoid cap reads 0414701035, 0414701060, 0414701068, or 0414701069, the seal cavities are identical, which means one F00041N040 Injector Repair Kit services the entire family.

 

Because the solenoid armature, needle guide, and IMA code remain untouched, the rebuilt injector retains its original flow characteristic. The ECU adapts immediately, with rail pressure deviation dropping to within ±15 bar during snap‑throttle events.

 

Q1: Can I visually separate the four injector variants covered by the F00041N040 kit?
Externally they appear near‑identical. The definitive identifier is the laser‑etched part number on the solenoid cap. Wipe the flat area clean and use a strong light; all four - 0414701035, 0414701060, 0414701068, 0414701069 - will accept the same seals.

Q2: Does the kit stop diesel from weeping past the injector body into the cylinder head well?
Yes. The external body O‑rings and the combustion seal washer work together to form a dual barrier. Replace both using the kit and the well will stay dry under full‑load boost pressure.

Q3: Is a scan tool required after installing the repair kit?
No ECU reprogramming is needed when the original injector body is reused. The injector‑specific IMA code and solenoid response remain unchanged. A short road test or stationary run is enough for the ECU to re‑adapt fuel trims.

Q4: What return‑flow volume should I expect after a successful rebuild?
On a Bosch EPS‑type test bench at 1,600 bar, a properly sealed unit should return less than 12 ml/min. Values under 15 ml/min are generally considered acceptable for high‑mileage injectors.

Q5: The kit contains multiple shims - are they pre‑sorted?
Each shim is laser‑marked with its thickness. You will need a micrometer to confirm, but the 0.02 mm increment steps allow precise NOP targeting without extra shim stock.

Q6: Can this seal kit improve cold‑start white smoke when the nozzle spray pattern is still good?
Indirectly, yes. White smoke on a cold start often results from rail pressure decay during cranking, which is exacerbated by internal seal leaks. By restoring hydraulic tightness, the kit helps the injector achieve clean atomisation pressure faster, reducing unburnt fuel mist.

 

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