Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) Diesel Injector
Cross-Reference & Technical Specs
Authoritative technical specifications, verified Bosch part numbers, control valve stamping codes, nozzle spray orifices, and hold-down tightening torque for the Yuchai YC6J diesel engine family.
All Verified Part Numbers for Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail)
The following 3 common-rail injector assemblies are calibrated for this engine family. Click any SKU to view individual test bench flow curves, sister cross-references, and vehicle applications.
Bosch 0445120164 Common Rail Injector for Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) →
BOSCH CRIF00RJ02806Nozzle Code: DLLA150P1827+Bosch 0445120165 Common Rail Injector for Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) →
BOSCH CRIF00RJ02806Nozzle Code: DLLA150P2123Bosch 0445120083 Common Rail Injector for Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) →
BOSCH CRIF00RJ02806Nozzle Code: F00RJ03472| Part Number (SKU) | Primary OE Reference | Control Valve | Nozzle Code |
|---|---|---|---|
| A60001112100A38 | F00RJ02806 | DLLA150P1827+ | |
| J0100-1112100-A38 | F00RJ02806 | DLLA150P2123 | |
| G2100-1112100-A38 | F00RJ02806 | F00RJ03472 |
Verified Vehicle Compatibility
| Make / Manufacturer | Vehicle Model & Platform | Engine Specification | Model Years |
|---|---|---|---|
| Golden Dragon | XML6102J | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2010-2020s |
| Golden Dragon | XML6122J | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2010-2020s |
| King Long | XMQ6106B / XMQ6998 | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2014-present |
| Higer | Higer KLQ-series 8-11 m road buses | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2010s-2020s |
| Yuchai | 4x2 / 6x2 medium cargo truck / dump truck | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2010-present |
| Yuchai | 9-10 m school bus platforms (multiple OEM chassis including Golden Dragon XML6722J18C, King Long XMQ6-series) | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2014-present |
| Yutong | ZK6932D / ZK6932HG | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2010-2015 |
| Higer | KLQ6129 / KLQ6826 | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2011-2016 |
| King Long | XMQ6900Y / XMQ6930Y | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2012-2017 |
| Dongfeng | EQ5168 / EQ5250 | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2010-2016 |
| Foton | BJ5163 / BJ5253 | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2011-2016 |
| Yutong | ZK6119 school bus | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2010-2014 |
| King Long | 5.2D Commercial Coach | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2006-2016 |
| Yuchai | Commercial Medium Truck 4.3D | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2006-2016 |
| Yuchai | Heavy Commercial Truck 6.5D | Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) | 2009-2018 |
Installation, Tightening Torque & Re-torque Protocol
Strict torque compliance is mandatory on Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) common-rail cylinder heads. Over-torquing stretches the injector body or strips the head clamping threads, while under-torquing allows combustion blow-by past the copper sealing washer:
- Hold-down clamp bolt: 20 N·m + 90° (cold state). Always clean the cylinder head recess with an injector seat reamer.
- High-pressure rail flare nut: 25-30 N·m using a dedicated 17 mm line wrench.
- Return leak-off banjo bolt: 9-12 N·m with fresh copper washers on both sides of the banjo union.
After fitting replacement injectors on Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail), generate or program the cylinder-specific IMA calibration code into the engine ECU using an OEM-level scan tool (Bosch KTS, Renault CLIP, or VAG-COM) to prevent cylinder power imbalance and rough idle.
Technical Diagnostics FAQ for Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail)
What DTC fault codes indicate a failing injector on Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail)?
The most frequent fault codes are P0201 through P0204 (Injector Circuit Malfunction on Cylinders 1-4), P2146/P2149 (Injector Group Supply Voltage Error), and P0087 (Fuel Rail Pressure Low due to excessive internal leak-off). Measure solenoid coil resistance across the pins (0.5-1.5 Ω) and perform a graduated-bottle dynamic leak-back test to pinpoint the leaking cylinder.
Can sister SKUs within the Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) family be interchanged?
Not unless explicitly confirmed on the vehicle build plate. While sister SKUs share the same physical outer envelope and F00RJ02806 control valve, they differ in nozzle spray orifice angle and factory IMA flow calibration. Mixing sister SKUs on the same engine block can trigger rough idle, elevated exhaust gas temperatures (EGT), and MOT emissions failure.
Which specific Bosch injectors fit the Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) engine?
The verified genuine Bosch common-rail injectors engineered for the Yuchai YC6J / YC6JA / YC4G (4.3L - 6.5L Common Rail) engine family are:
- Bosch 0445120164 Common Rail Injector → (OE: A60001112100A38) — Control Valve: F00RJ02806, Nozzle Code: DLLA150P1827+
- Bosch 0445120165 Common Rail Injector → (OE: J0100-1112100-A38) — Control Valve: F00RJ02806, Nozzle Code: DLLA150P2123
- Bosch 0445120083 Common Rail Injector → (OE: G2100-1112100-A38) — Control Valve: F00RJ02806, Nozzle Code: F00RJ03472