Place of Origin:
China
Brand Name:
Yuchai
Model Number:
S04-1118100-L05-08
A four-cylinder National VI turbocharger assembly whose identification plate carries four distinct fields. The drawing number, model line, serial and short code each serve a different purpose, and the field a buyer quotes is rarely the one that identifies the physical unit. Two revisions of the same drawing sit one digit apart, while the eleven-figure group in the middle is shared by several unrelated Chinese engine programmes.
| Product Name | Turbocharger assembly, wastegated |
|---|---|
| Drawing Number | S04-1118100-L05-08, with the earlier revision S04-1118100-L05-07 alongside |
| Model Field | YC4G-L05 |
| Serial Field | 105JC180010, unique to the unit photographed |
| Code Field | L05 |
| Maker On Plate | The Ningbo charger works, whose name is cast into the cover as well |
| Engine Programme | The YC4G family, filed by suppliers under National VI |
| Boost Control | Single canister on a bracket, fed by a short hose from the cover |
| Cooling As Shown | No coolant ports appear on the photographed unit |
| Compressor Wheel | Six full blades, boreless nut |
| Packing | Foam cradle, ports capped, actuator braced against the bracket |
| Four Fields, One Plate | The drawing figure, the model line, the serial and the short code all sit on a label the size of a stamp, and a buyer who quotes the wrong one sends the enquiry into a different queue. |
|---|---|
| Two Revisions | The seventh and eighth revisions share every character but the tail, so a stored quotation can drift onto the neighbouring unit without anyone noticing. |
| The Middle Group | That eleven-figure block is used by several unrelated Chinese engine programmes as the generic code for a complete charger, so a search on it alone crosses brands and displacements. |
| Prefix Is Not The Maker | The opening letters belong to the engine side series, while the charger workshop records its own serial separately, and neither one can be worked out from the other. |
| Model Line Read Direct | The model field carries the engine family and a two-character build tag, which is why two units that look identical on a shelf can belong to different ratings. |
| Emission Wording | Suppliers file this unit under the sixth stage, and the same housing shape also appears on earlier builds with different boost targets, so the plate outranks the listing. |
| Caution — Preset Canister | The canister leaves the bench with its rod length set, and turning it to chase a fault hides a leaking charge pipe behind a wrong boost curve. |
| Caution — Short Reference Hose | The little hose between cover and canister hardens first, and a split there reads as a failed charger because boost falls away under load only. |
| Caution — Feed Union Screen | A screen inside the oil inlet traps carbon on high-hour engines, and a fresh centre housing will not survive a shift if it is left in place. |
| Caution — Inlet Dust | Blade tips that look polished rather than broken point at unfiltered air, and replacing the charger without the element repeats the failure. |
| Related Components | Canister, cartridge, gasket set, oil feed pipe, oil drain pipe, charge hose, exhaust studs. |
The drawing number, because it is the only field the workshop and the engine side both accept; the serial identifies one physical unit and cannot be ordered.
They mount the same way, so the question is which one the engine was calibrated against, and that is a plate question rather than a catalogue question.
Because that block is a shared code for a complete charger across several Chinese programmes.
It marks the build, not the frame size.
The photographed example shows no coolant ports.
No, and a shortened rod will mask a leaking charge pipe.
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