Description
Feed Pipe To Injector – 4th Cylinder For RAIL 1.5 HDi In Vehicles Citroën, Peugeot, Fiat, Toyota, Opel
High-quality feed pipe for the 4th cylinder injector, designed for the 1.5 HDi common-rail system used across multiple Stellantis platforms. This injector supply line (OE 9825615580) connects the high-pressure rail to the injector, ensuring stable fuel delivery under diesel common-rail pressures. Ideal for professional workshops and experienced DIY mechanics looking for a direct replacement that fits original routing and mounting points.
Application And Compatibility
Fits RAIL 1.5 HDi common-rail diesel engines installed in Citroën and Peugeot models and some Fiat, Toyota, and Opel applications that share the same fuel-rail architecture. Frequently referenced by part number 9825615580. Use this injector pipe when replacing a leaking, corroded, or mechanically damaged line on the 4th cylinder.
Technical Information
- Manufacturer: Stellantis
- Model: RAIL 1.5 HDi (Vehicles Citroën, Peugeot, Fiat, Toyota, Opel)
- Product Codes: 9825615580
- Other Numbers: 9825615580
Function And Features
The injector feed pipe transmits high-pressure diesel from the common rail to the 4th cylinder injector. Constructed to withstand common-rail pressures and thermal cycling, the tube maintains precise fuel delivery geometry for correct injector seating and spray patterns. Proper function is critical for engine performance, fuel economy, and emissions control.
Recommended Installation
Only qualified technicians or experienced DIY mechanics should service high-pressure diesel components. Follow these guidelines:
- Depressurize the fuel system before loosening any high-pressure fittings—follow manufacturer procedure.
- Use appropriate high-pressure line wrenches to avoid rounding nut faces. Avoid using adjustable pliers on flare nuts.
- Always replace sealing washers (crush washers) at both ends of the pipe with new OEM-spec washers.
- Tighten fittings to the manufacturer’s torque specification; when in doubt, follow factory service manual values.
- After installation, check for leaks at idle and under load. Prime and bleed the system as required to remove air pockets.
- Inspect nearby components (clips, brackets, heat shields) and replace any damaged fasteners to ensure correct routing and vibration isolation.
Why This Part Fails
Injector feed pipes typically fail due to a few common causes: corrosion from moisture and road salt, mechanical damage during removal or from impact, vibration fatigue at connection points, and degradation of sealing washers leading to high-pressure leaks. Improper use of tools or over-tightening can deform fittings and cause leaks. Contaminated fuel or poor injector condition can also accelerate wear.
Service Life And Replacement Advice
There is no fixed replacement interval for high-pressure injector pipes — they are replaced as needed. Inspect the pipe whenever injector service or rail work is performed. Replace immediately if any signs of leakage, visible corrosion, deformation, or cracked fittings are present. When replacing the pipe, always fit new crush washers and verify leak-free operation under pressure.
Keywords For Search
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