Description
Supply Pipe To Third And Fourth Cylinders For RAIL 1.4 HDI 16V 8HY
This fuel rail supply pipe is designed for the third and fourth cylinders of the 1.4 HDi 16V common rail engines (engine code 8HY) used on selected Citroën and Peugeot models. Built to match the routing and connection points of the original system, the pipe ensures correct fuel delivery to the rear injectors and maintains system integrity under high-pressure common rail conditions. Ideal for professional workshops and DIY mechanics searching by part number (1570F7), this component restores proper fuel flow and stops injector-area leaks that cause performance loss and safety risks.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: 1.4 HDi 16V (Engine Code 8HY); Applicable Vehicles: Citroën C3, Peugeot 1007
- Product Codes: 1570F7
- Additional Numbers: NFP
Fitment And Application
Fits Common Rail 1.4 HDi 16V engines with engine code 8HY on selected Citroën and Peugeot models. Frequently referenced by the OEM part number 1570F7, this supply pipe connects the fuel rail to the third and fourth cylinder injector fittings and is located on the rear section of the cylinder head on these engines.
Mounting Recommendations
- Safety First: Relieve Fuel System Pressure Before Starting Work. Wear Eye Protection And Gloves.
- Preparation: Clean The Surrounding Area To Prevent Dirt Entering The Fuel System When Removing The Old Pipe.
- Replacement Steps: Disconnect The Low-Voltage Supply If Recommended By The Repair Manual, Carefully Undo The Fuel Line Fasteners, Remove The Old Pipe Along With Any Old Seals, Fit New O-Rings Or Seals Lubricated With Clean Diesel Or Manufacturer-Approved Grease, Position The New Pipe Correctly And Refit Fasteners.
- Tightening: Tighten Fasteners To Manufacturer Specifications Listed In The Workshop Manual. If Exact Torque Values Are Not Available, Use A Torque Wrench And Follow The Specified Sequence To Avoid Stressing The Pipe Or Fittings.
- After Installation: Prime The Fuel System According To The Vehicle Procedure, Start The Engine, And Inspect All Connections For Leaks While The Engine Is Running. Recheck After A Short Test Drive.
Why This Part Fails Most Often
Failures Typically Result From O-Ring Degradation, Vibration-Induced Fatigue, Corrosion, Or Mechanical Damage From Impact Or Improper Handling During Previous Repairs. Leaking Seals Around The Injector Or Rail Connections Are The Most Common Symptoms, Often Leading To Fuel Odor, Hard Starting, Rough Idle, Or Loss Of Power. Regular Inspections During Major Services Help Detect Early Signs Of Leakage Or Damage.
For mechanics and competent DIYers, replacing this supply pipe with a correctly fitted unit and fresh seals restores fuel system sealing and injector performance, reducing the risk of fuel leaks and the associated safety hazard. Always follow the vehicle manufacturerís workshop procedures for disassembly, torque settings, and system priming.
