The Bosch VP30 injection pump with part number 0470006004 is a critical and sophisticated component for a specific Isuzu engine. Let's break down everything you need to know.
Core Information
Bosch Part Number: 0 460 494 506 (This is the classic Bosch number, often found on the pump itself)
Isuzu Part Number: 8-97213-186-2 (This is the primary Isuzu number you should cross-reference)
Common Application: Isuzu 6HK1-TC (6HK1-XS) engine.
Engine Type: In-line 6-cylinder, turbocharged diesel.
Vehicle Applications: This pump was used in:
Isuzu Giga (C&E Series) heavy-duty trucks
Isuzu Forward medium-duty trucks
Some stationary/industrial generator sets with the 6HK1 engine.
Key Features of the Bosch VP30 Pump
The VP30 is a radial piston, electronically controlled, unit pump system (UPS). It's a significant evolution from older in-line mechanical pumps.
Electronic Control (EDC): It's controlled by the engine's ECU via a solenoid valve. This allows for precise fuel metering and timing for better performance, lower emissions, and improved fuel economy.
Radial Piston Design: Four radial pistons pressurize the fuel, capable of generating extremely high injection pressures (up to 1800 bar or more), which is essential for clean combustion with modern injectors.
Unit Pump System: High pressure is generated at each pump element, with short high-pressure lines to the injectors.
The "VE6/12M1100R1" Designation
This is Isuzu's internal engineering code for the specific pump configuration:
VE: Likely denotes the pump series or family (Variable, Electronic).
6: Number of cylinders (for the 6-cylinder 6HK1 engine).
12: Related to the plunger diameter or pump displacement (e.g., 12mm).
M1100: Often refers to the engine model or power rating (for the 1100 RPM torque peak or power band).
R1: Revision or variant code.
⚠️ Crucial Warning: Matching the Code is Essential
When replacing this pump, the VE6/12M1100R1 code must match exactly the one on your old pump. Even small differences (e.g., R1 vs R2) can indicate different calibrations for horsepower rating, emissions standard (like JASPA), or application, leading to poor performance or engine damage.
Common Problems & Symptoms of a Failing VP30 Pump
Hard Starting / No Start: Failure to build sufficient high-pressure fuel.
Loss of Power: Wear in the rotor/roller assembly reduces maximum pressure.
Rough Idling or Unstable RPM: Issues with the electronic control or internal wear.
Increased Fuel Consumption & Black Smoke: Incorrect fuel metering.
Diagnostic Trouble Codes (DTCs): The ECU will store codes related to fuel quantity, timing control, or solenoid circuit faults.
Important Considerations for Repair/Replacement
Exchange Units: The most common and cost-effective solution is a remanufactured/exchange pump. Core return (your old pump) is almost always required.
Calibration & Coding: The new pump MUST be calibrated and the new fuel code (often a 4-digit "QR" code) MUST be programmed into the engine ECU using specialized diagnostic software (e.g., Isuzu IDSS, Bosch ESI[tronic], or other heavy-duty scanners). Simply bolting it on will not work.
Quality of Remanufacture: This is a precision component. Use reputable Bosch-certified or well-known diesel specialist rebuilders. Cheap rebuilds often fail quickly.
Complete Diagnosis: Before condemning the pump, rule out other issues:
Fuel Supply: Check lift pump pressure, clean fuel filters, no air ingress.
Injectors: Worn injectors can mimic pump failure.
Electronics: Check wiring, connectors, and sensors (crank, cam, rail pressure) before replacing the pump.
Summary
The Bosch 0470006004 (Isuzu 8-97213-186-2) VP30 pump is a high-precision electronic injection pump for the Isuzu 6HK1 engine. Successful replacement involves:
Verifying the exact VE6/12M1100R1 code.
Sourcing a quality remanufactured exchange unit.
Programming the new fuel code into the ECU after installation.
Having the work done by a technician experienced with Isuzu EDC systems.
Always consult a professional diesel fuel injection specialist for diagnosis and service on this complex component.
Where to buy Bosch 0470006004 fuel injection pump ?
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