0445120008 — Complete Overhaul / Rebuild Kit For Common-Rail Injector

0445120008 overhaul kit - a workshop-ready collection of precision seals, valves and wear components engineered to bring Bosch-spec common-rail injectors back to OEM behavior. Ideal for professional diesel shops, fleet depots and remanufacturers, this kit targets the small parts that most commonly cause leakage, poor spray patterns and unstable rail pressure when worn or contaminated.

 

 

✓ High-precision

✓ O-rings, backup rings and internal seals sized for 0445120008 housings

Note: contents vary slightly by supplier - always verify the supplied parts list to ensure it matches your injector revision.

 

 

0445120008 and common-rail systems that use this nozzle/valve family. Typical applications include light-to-medium commercial vehicles, regional delivery trucks and industrial engines where Bosch CRI components are fitted. Always confirm injector part tag and engine/pump serial to ensure exact interchange - mixing revisions can lead to incorrect fit or hydraulic mismatch.

 

 

🔧 New seals eliminate internal bypass and external leaks that reduce rail pressure and cause hard starts.

🚚 Fresh valve/nozzle components re-establish correct atomization, lowering smoke and improving fuel economy.

⏱ A rebuild with a complete kit is substantially cheaper and faster than replacing the full injector assembly.

🛡 Correct spray and return flow behavior reduce DPF stress and aftertreatment load.

 

 

- record injector serials, install photos and fault history before disassembly.

- ultrasonic or approved solvent cleaning removes varnish and deposits prior to measurement.

- measure nozzle tip geometry, valve seats and bore condition; reject cores with scoring beyond service limits.

- replace all seals, valves and filters; do not reuse elastomers or springs.

- flow, leak and spray pattern tests on a calibrated injector tester; flow-match to OEM tolerances across the set.

- attach bench certificates and batch codes to the serviced injector for traceability.

 

 

low deviation across matched set: within ±0.5–1.5% (follow OEM bench spec)

 

 

0445120008 overhaul kit is a high-value service item that returns worn Bosch common-rail injectors to precise, factory-like operation. When combined with rigorous cleaning, dimensional checks and bench testing, a complete kit is one of the most economical ways to recover engine performance, reduce emissions and protect expensive aftertreatment hardware - keeping fleets rolling and workshops profitable.

 

 

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