High-Pressure Injection Pipe 8-97148965-0 8971489650 For ISUZU NPR/NQR/NPR-HD 4HE1 4.8L 1998-2004 — OEM Fuel Line For Cylinder #3
| OEM Part Number: | 8-97148965-0 / 8971489650 | Part Name: | Injection Pipe No. 3 / PIPE; INJ NO 3 |
| Engine Compatibility: | ISUZU 4HE1 4.8L Diesel | Vehicle Models: | ISUZU NPR, NQR, NPR-HD (1998–2004) |
| Material: | High-Speed Steel With Machined Exterior Finish | Cylinder Position: | No. 3 Cylinder |
| Condition: | Brand New — 100% Quality Inspected | Warranty: | 12 Months |
| High Light: | Isuzu NPR fuel injection pipe,OEM high-pressure fuel line,4HE1 engine injection pipe |
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The Injection Pipe No. 3 with OEM number 8-97148965-0 (also listed as 8971489650) is a verified direct-fit replacement for the #3 cylinder high-pressure fuel line on ISUZU 4HE1 4.8L diesel engines. This precision-engineered component is critical for delivering precisely metered, high-pressure diesel fuel from the injection pump to the #3 injector.
If your injection pipe is failing, you may experience one or more of the following symptoms:
- Diesel Fuel Leaks: Visible fuel seepage or wetness near the #3 injector or along the pipe
- Hard Starting: Extended cranking time before the engine starts
- Engine Misfire: Rough running or misfiring, especially under load
- Loss of Engine Power: Significant reduction in acceleration and overall performance
- Strong Diesel Fuel Odor: Noticeable fuel smell in the engine bay or cabin
- Visible Damage: Cracks, corrosion, or deformation on the fuel line
| Brand | Model | Chassis / Series | Engine | Years |
|---|---|---|---|---|
| ISUZU | NPR | N-Series | 4HE1 4.8L | 1998-2004 |
| ISUZU | NQR | N-Series | 4HE1 4.8L | 1998-2004 |
| ISUZU | NPR-HD | N-Series | 4HE1 4.8L | 1998-2004 |
- This injection pipe is specifically for the #3 cylinder on ISUZU 4HE1 engines
- For #1, #2, and #4 cylinder pipes, refer to part numbers 8-97148963-4, 8-97148964-0, and 8-97148966-4 respectively
- Please verify your vehicle's chassis code, production year, and engine code before ordering
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to verify exact OEM length, internal diameter, and cone seat geometry |
| Material Composition | High-speed steel analysis to verify pressure integrity |
| Cone Seal Integrity | 100% inspection of precision-formed cone seals for metal-to-metal gas-tight sealing |
| Pressure Test | High-pressure testing to guarantee zero leakage under operating conditions |
| Corrosion Resistance | Material verification to ensure resistance to fuel corrosion and environmental factors |
| Final Assembly Inspection | 100% visual and dimensional inspection before packaging |
High-pressure injection pipes operate under extreme pressure. ISUZU service manuals explicitly mandate that injection pipes must be replaced with new ones whenever removed – these are single-use components. Installation requires precision and proper torque to avoid leaks.
- Do not reuse old injection pipes – they are single-use components
- Do not bend or modify injection pipes – they are precision-shaped for correct fuel delivery timing and sealing
- Depressurize the fuel system before starting work
- Clean the area around the injector and injection pipe connections to prevent contamination
- Depressurize the fuel system and disconnect the negative battery terminal
- Remove the old injection pipe from the #3 injector and injection pump
- Clean the connection surfaces thoroughly
- CRITICAL: Install the new injection pipe with correct orientation – no bending or modification allowed
- CRITICAL: Torque the pipe connections to manufacturer's specified torque settings to ensure proper cone seal metal-to-metal joint formation
- CRITICAL: Proper fuel system bleeding is necessary to remove air and ensure correct injector operation
- Start the engine and inspect for fuel leaks around the connections
- Inspection: During routine fuel system service or if fuel leaks / performance issues appear
- Replacement: Immediately if failure symptoms appear. Always replace with new pipes when servicing injectors or the injection pump
- Note: While individual pipes can be replaced, high-mileage engines may benefit from replacing the full set (pipes #1-#4) to ensure uniform performance
Each injection pipe is securely packed in protective packaging to prevent shipping damage. Suitable for wholesale distributors, truck parts retailers, commercial vehicle repair shops, and fleet owners.
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