Description
Fuel supply pipe to the first cylinder for the rail in 1.4 HDi and 1.6 HDi e-HDi engines.
This high-quality fuel inlet pipe is designed for the common-rail system and delivers precise, reliable fuel feed to the first cylinder on Citroën and Peugeot diesel engines 1.4 HDi and 1.6 HDi e-HDi. Ideal for professional workshops and experienced DIY mechanics, the replacement part restores correct fuel routing and pressure integrity in the low- to medium-pressure section of the rail assembly. SEO-focused keywords included: Citroën, Peugeot, fuel rail pipe, inlet pipe, 1570P9, 1.4 HDi, 1.6 HDi e-HDi, common rail.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Fuel Rail Supply Pipe (First Cylinder)
- Product Codes: 1570P9
- Other Numbers: N/A
Function And Role
The inlet pipe routes fuel from the common rail assembly to the first injector. Although it operates at lower pressure than the high‑pressure injector lines, it must maintain an airtight, vibration‑resistant connection to prevent leaks and maintain proper rail pressure. Correct sealing and secure fastenings are essential for safe operation.
Compatibility
Fits Citroën and Peugeot vehicles equipped with 1.4 HDi and 1.6 HDi e-HDi common‑rail diesel engines. Often referenced by the OEM code 1570P9. Ensure fitment by matching the part code to the vehicle’s parts list before ordering.
Replacement Procedure (Overview)
Recommended for trained technicians or experienced DIY mechanics. Typical replacement steps:
- Depressurize the fuel system according to the manufacturer procedure to avoid spray or fuel loss.
- Remove engine covers or components that obstruct access to the rail and inlet pipe.
- Carefully disconnect the inlet pipe from the rail and from the supply connection, retaining or replacing any clips or brackets.
- Replace sealing washers or O‑rings with new parts specified by the manufacturer.
- Install the new pipe, secure all fittings and brackets, and torque fasteners to the manufacturer’s specifications.
- Prime the fuel system and check for leaks. Start the engine and inspect under load for secure connections and correct operation.
Why The Part Fails Most Often
Common failure causes include mechanical damage during engine work, corrosion from contaminated fuel or road conditions, vibration fatigue at connection points, and deteriorated sealing washers or O‑rings. Improper installation, overtightening, or reusing old seals also leads to leaks and loss of rail pressure.
Recommendations For Installation
- Always use new sealing washers or O‑rings; never reuse old seals.
- Follow the manufacturer torque specs for fittings to avoid cracking or thread damage.
- Keep the work area clean to prevent contamination entering the fuel system.
- After installation, prime the system slowly, check for leaks at idle and under load, and recheck fasteners after the first run.
- If in doubt, have the replacement performed or inspected by a qualified technician familiar with PSA common‑rail systems.
Replacing the inlet pipe with a correct OEM‑coded part such as 1570P9 restores reliable fuel delivery and reduces the risk of fuel leaks and injector rail pressure issues—critical for engine performance and emissions control.
