Description
Supply Pipe To The Third And Fourth Cylinders For RAIL 1.4 HDI 16V 8HY
This high-pressure feed pipe connects the common rail to the injectors for cylinders three and four on 1.4 HDi 16V (8HY) engines. Designed for Citroën and Peugeot applications, the pipe is a direct-fit replacement often searched by part number 1570F7. It is an essential item for professional workshops and experienced DIY mechanics repairing fuel delivery to the affected injectors or replacing damaged rail lines.
The pipe’s primary function is to transport pressurized diesel from the common rail to the injector connections for cylinders 3 and 4 while maintaining a secure, leak-free seal under high pressure. Proper condition of this pipe is critical for consistent injection timing and engine performance; a leaking or damaged pipe can cause rough running, fuel smell in the engine bay, or fuel leaks.
Technical Information
- Manufacturer: Stellantis / Citroén / Peugeot
- Model: 1.4 HDI 16V (Engine Code 8HY); Citroën C3; Peugeot 1007
- Product Codes: 1570F7, 1570.F7
- Other Numbers: NFP
Installation Recommendations
- Work With Depressurized Fuel System: Before any disassembly, relieve fuel pressure according to the vehicle service manual to avoid high-pressure spray.
- Disconnect Battery: Isolate electrical supply to prevent accidental cranking during work.
- Clean Work Area: Remove dirt and debris around the rail and injector ports to prevent contamination entering the fuel system.
- Replace Sealing Elements: Fit new sealing washers or O-rings where applicable. Do not reuse old seals.
- Correct Orientation And Secure Fixing: Install the pipe in the original routing; avoid kinks or contact with hot or moving parts. Tighten clamps and fittings to manufacturer torque specifications.
- Leak Check After Installation: Prime the system, start the engine, and inspect all connections under operating pressure for leaks before finishing the job.
- Safety Precautions: Wear eye protection and gloves. Avoid open flames and smoking while working on the fuel system.
Most Common Causes Of Failure
- Corrosion And Material Degradation: Exposure to moisture and road salts can corrode metal lines or fittings, compromising the seal.
- Seal Deterioration: O-Rings and sealing washers age and harden, leading to leaks at the connections.
- Mechanical Damage: Impact, abrasion, or improper handling during previous repairs can deform the pipe or fittings.
- Vibration And Fatigue: Repeated engine vibrations and thermal cycling can cause loosening of fittings or micro-cracks over time.
- Incorrect Installation: Reused seals, improper tightening, or incorrect routing can lead to early failure.
Search By Part Number For Faster Results: 1570F7. Order the correct feed pipe to restore reliable fuel delivery and avoid performance issues related to leaks or pressure loss.
