Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic 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 Isuzu 4HK1 (5.2L) diesel engine family.
All Verified Part Numbers for Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail
The following 2 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 0445120027 Common Rail Injector for Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail →
BOSCH CRIF00RJ01159Nozzle Code: DLLA158P1385Bosch 095000-5471 Common Rail Injector for Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail →
BOSCH CRIPlate 29# / Denso G2 Valve PlateNozzle Code: DLLA152P947| Part Number (SKU) | Primary OE Reference | Control Valve | Nozzle Code |
|---|---|---|---|
| 8-97603415-4, 8-97603415-0, 8-97603415-1 | F00RJ01159 | DLLA158P1385 | |
| 8-97329703-4, 8-97329703-1, 8-97329703-2 | Plate 29# / Denso G2 Valve Plate | DLLA152P947 |
Verified Vehicle Compatibility
| Make / Manufacturer | Vehicle Model & Platform | Engine Specification | Model Years |
|---|---|---|---|
| Hitachi | Zaxis ZX200-3 / ZX200LC-3 Crawler Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2014 |
| Hitachi | Zaxis ZX240-3 / ZX250-3 Heavy Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2015 |
| Hitachi | Zaxis ZX270-3 / ZX330-3 / ZX350-3 Hydraulic Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2015 |
| JCB | JS200 / JS210 / JS220 / JS240 Heavy Tracked Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2007-2016 |
| Case | CX210B / CX240B Hydraulic Crawler Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2007-2015 |
| Hitachi | ZAXIS ZX200-3 / ZX200LC-3 Crawler Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2015 |
| Hitachi | ZAXIS ZX240-3 / ZX250-3 Crawler Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2015 |
| Hitachi | ZAXIS ZX270-3 Crawler Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2015 |
| Hitachi | ZAXIS ZX330-3 / ZX350-3 Heavy Crawler Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2015 |
| Sumitomo | SH200-5 / SH210-5 / SH240-5 Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2015 |
| Case | CX210B / CX240B Crawler Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2007-2016 |
| JCB | JS200 / JS210 / JS220 Hydraulic Excavator | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2006-2014 |
| Isuzu | Forward / FTR / FVR Medium-Duty Truck | Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail | 2005-2016 |
Installation, Tightening Torque & Re-torque Protocol
Strict torque compliance is mandatory on Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic 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: 26-30 N·m (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 Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic 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 Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail
What DTC fault codes indicate a failing injector on Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic 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 Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail family be interchanged?
Not unless explicitly confirmed on the vehicle build plate. While sister SKUs share the same physical outer envelope and F00RJ01159 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 Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail engine?
The verified genuine Bosch common-rail injectors engineered for the Isuzu 4HK1 (5.2L) & 6HK1 (7.8L) Electronic Common Rail engine family are:
- Bosch 0445120027 Common Rail Injector → (OE: 8-97603415-4, 8-97603415-0, 8-97603415-1, 8-97603415-2, 8-97603415-3, 8-97603415-5, 8-97603415-6, 8-97603415-7, 8-97603415-8, 4652265, J6600, 87310574) — Control Valve: F00RJ01159, Nozzle Code: DLLA158P1385
- Bosch 095000-5471 Common Rail Injector → (OE: 8-97329703-4, 8-97329703-1, 8-97329703-2, 8-97329703-3, 8-97329703-0, 095000-5470, 095000-5472, 095000-5473, 095000-5474, 095000-8901, 095000-8902, 095000-8903) — Control Valve: Plate 29# / Denso G2 Valve Plate, Nozzle Code: DLLA152P947