Description
Remanufactured electronic unit injector (EUI) for the Caterpillar 3406E, C15, and C16 14.6L and 15.8L on-highway diesel engines, built and tested by Delphi to OE-equivalent flow and timing standards. The Delphi EX630958 replaces Cat 10R0958 and 10R2780 (current service), plus the earlier 0R4118, 0R4668, 0R4893, and 0R9258 service numbers.
Symptoms of a Failing EUI Injector
- Hard starting, extended cranking, or no-start condition
- Rough idle, miss under load, or cylinder cutout in active diagnostics
- White or black smoke from incomplete combustion or over-fueling
- Elevated fuel dilution of engine oil or excessive blow-by
- Active or logged DTCs for cylinder balance, injector solenoid, or trim-code mismatch
Specifications
| Manufacturer | Delphi Technologies |
|---|---|
| Part Number | EX630958 |
| Part Type | Remanufactured Electronic Unit Injector (EUI) |
| Engine Compatibility | Caterpillar 3406E / C15 / C16 (14.6L / 15.8L) |
| Condition | Remanufactured — flow-matched and tested |
| Core Charge | Yes — refundable on return of rebuildable core |
Cross References
This injector replaces or is equivalent to the following part numbers:
- Caterpillar: 10R0958, 10R2780
- Caterpillar (superseded): 0R4118, 0R4668, 0R4893, 0R9258
Applications
This EUI injector fits the following engines:
- Caterpillar 3406E 14.6L (≈1994-2003)
- Caterpillar C15 15.8L (single-turbo, on-highway)
- Caterpillar C16 15.8L (on-highway)
Representative vehicles using these engines:
- Class 8 on-highway tractors — Peterbilt 379/385/387, Kenworth W900/T800/T600, Freightliner Classic/Century/Columbia, Western Star
- Vocational severe-service trucks spec’d with the 3406E / C15 / C16
Verify engine serial number, performance code, and emissions calibration before ordering. Cat 14.6L / 15.8L engines exist in multiple trim windows; mismatched injector calibration can cause cylinder-balance faults or engine damage. Replace all six injectors as a set when service intervals warrant.
