DLLA153SM029 Fuel Injector Nozzle with 185 bar Opening Pressure for ISUZU 6BG1 Throttle-Type Diesel Injection
| Nozzle Model: | DLLA153SM029 | Nozzle Type: | Throttle-Type (S-Type) |
| Injection Pipe Nut Torque: | 28–32 N·m (21–24 Lb·ft) | Net Weight: | 0.054 Kg |
| Opening Pressure: | 185 Bar (18.1 MPa) | Nozzle Dimensions: | 20 / 20 / 75 Mm |
| Material: | W6Mo5Cr4V2 / 18CrNi8 High-Speed Steel | Hardness: | HRC 62–65 (Vacuum Hardened) |
| High Light: | DLLA153SM029 Fuel Injector Nozzle,185 bar Opening Pressure Diesel Injection Nozzle,Throttle-Type Nozzle Tip |
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Fuel Injector Nozzle 9-43261045-0 9432610450 DLLA153SM029 for ISUZU 6BG1 6BG1T 4BG1 4BG1T Hitachi EX200 EX200-5 — Verified OEM Fit Zexel 105025-0290 Diesel Injection Nozzle
This fuel injector nozzle with OEM numbers 9-43261045-0 and 9432610450 — also referenced as DLLA153SM029 and Zexel 105025-0290 — is a verified direct-fit replacement for ISUZU 6BG1 / 6BG1T / 4BG1 / 4BG1T diesel engines used in various industrial and commercial applications.
The fuel injector nozzle is the precision element at the tip of the fuel injector. It receives pressurized fuel from the injection pump and atomizes it into a fine mist for efficient combustion. The DLLA153SM029 nozzle features a throttle-type (S-type) design with precision-ground needle and seat for accurate fuel metering.
Manufactured from high-speed steel (W6Mo5Cr4V2 / 18CrNi8) and vacuum-hardened to a hardness of HRC 62-65, ensuring wear resistance and long service life. The opening pressure for this nozzle is 185 bar (18.1 MPa), critical for proper fuel atomization and combustion efficiency.
- Engine misfiring or rough idle — clogged or worn nozzle holes cause uneven fuel delivery
- Excessive black smoke — poor atomization leads to incomplete combustion
- Power loss and increased fuel consumption — inefficient combustion reduces engine performance
- Hard starting — worn nozzles cause poor fuel delivery during startup
- Knocking or abnormal engine noise — irregular fuel spray patterns can cause combustion knock
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| Part Number (Short) | 9-43261045-0 | ISUZU OEM Parts Database |
| Part Number (Long) | 9432610450 | ISUZU OEM Parts Database |
| Nozzle Model | DLLA153SM029 | Zexel specification |
| Zexel Reference | 105025-0290 / H105025029 | Zexel parts database |
| Nozzle Type | Throttle-Type (S-Type) | Product specification |
| Opening Pressure | 185 bar (18.1 MPa) | Qingdao Yalong specification |
| Material | W6Mo5Cr4V2 / 18CrNi8 High-Speed Steel | Product specification |
| Hardness | HRC 62-65 (Vacuum Hardened) | Product specification |
| Nozzle Dimensions | 20 / 20 / 75 mm | dieselrepair.kz specification |
| Net Weight (per unit) | 0.054 kg | dieselrepair.kz specification |
| Type | Number |
|---|---|
| Primary OEM — Short | 9-43261045-0 |
| Primary OEM — Long | 9432610450 |
| Nozzle Model | DLLA153SM029 |
| Zexel Reference | 105025-0290 / H105025029 |
| ISUZU OEM | 1-15311-263-0 / 1153112630 |
| Part Number: | 9-43261045-0 DLLA153SM029 | Product Name: | Fuel Injector Nozzle |
| Car Model: | EX200 | Engine Model: | 6BG1 |
| Condition: | 100% Brand New | Origin: | China Mainland |
Primary Applications:
| Brand | Model | Engine | Years |
|---|---|---|---|
| ISUZU | NPC / NPR / NPS | 6BG1 / 6BG1T | 1990s-2000s |
| ISUZU | Forward | 6BG1 / 6BG1T | 1990s-2000s |
| Hitachi | EX200 / EX200-5 / EX200-6 | 6BG1 / 6BG1T | 1990s-2000s |
| Hitachi | EX120-5 / EX135 | 4BG1 / 4BG1T | 1990s-2000s |
⚠️ Important Fitment Notes:
- This nozzle is designed for the DLLA153SM029 specification
- The 6BG1 injection system uses an opening pressure of 185 bar (18.1 MPa)
- Nozzles should be replaced as a complete set of six (for 6BG1) or complete set of four (for 4BG1)
- The Zexel 105025-0290 is the primary reference number
| Feature | Benefit + Verification Signal |
|---|---|
| Throttle-Type (S-Type) Design | Precision needle and seat geometry ensures optimal fuel atomization |
| High-Speed Steel Construction | Withstands extreme combustion pressures and temperatures for long service life |
| Vacuum Hardening (HRC 62-65) | Superior wear resistance and dimensional stability under heavy-duty operation |
| 185 bar Opening Pressure | Matches OEM injection system requirements for proper fuel atomization |
| OEM-Exact Fitment | Direct replacement without modification — confirmed by dimensional inspection |
⚠️ IMPORTANT: Fuel injector nozzle service must be performed by a qualified diesel technician in a clean workshop. Always clean the injector and surrounding area thoroughly before disassembly. Never reuse old copper washers.
- Preparation: Clean the injector and cylinder head area thoroughly
- Disassembly: Remove the injector using proper tools
- Inspection: Inspect the injector body for wear or damage
- Cleaning: Clean all components with clean diesel fuel
- Nozzle Installation: Install the new nozzle with a new copper washer
- Opening Pressure Test: Verify opening pressure is 185 bar (18.1 MPa)
- Leakage Test: Verify no leakage at pressures below opening pressure
- Installation: Install the injector into the cylinder head with new components
- Reconnection: Reconnect fuel lines and bleed the fuel system
- Final Check: Start the engine and check for fuel leaks
Recommended Torque Values:
| Fastener | Torque |
|---|---|
| Injection Pipe Connector | 49-59 N*m (36-43 lb*ft) |
| Injection Pipe Nut | 28-32 N*m (21-24 lb*ft) |
- Standard Packaging: Anti-rust oil + VCI film + neutral carton
- Custom Packaging: Neutral box, color box, or customer-branded packaging
- Suitable For: Diesel injection repair shops, ISUZU parts distributors, fleet maintenance centers
- Minimum Order Quantity: 6 PCS (complete set for 6-cylinder engine)
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