Description
Outlet Pipe Of The Injection Pump For RAIL 1.4 HDI 16V 8HY
This high‑pressure outlet pipe connects the injection pump to the common rail on 1.4 HDI 16V engines (engine code 8HY). It is a direct‑fit fuel line designed for Citroën and Peugeot RAIL systems and is frequently searched by the part number 1570F1. Replacing a worn or leaking outlet pipe restores correct rail pressure, prevents fuel leaks and improves engine reliability and emissions control.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C3; Peugeot 1007; 1.4 HDI 16V (Engine Code 8HY)
- Product Codes: 1570F1
- Additional Numbers: NFP
Function And Benefits
The outlet pipe transfers high‑pressure diesel from the injection pump to the common rail. A serviceable, leak‑free pipe is critical for keeping rail pressure stable under load, ensuring proper injection timing and quantity, and maintaining fuel economy and exhaust emissions within specification. Installation of a correct replacement prevents fuel seepage, reduces the risk of air ingress and helps avoid engine misfires or limp‑home modes caused by pressure loss.
Installation Recommendations
- Relieve fuel system pressure before work to avoid fuel spray. Follow safe workshop procedures.
- Work on a cold engine if possible and protect surrounding components from spilled diesel.
- Remove any engine covers or heat shields necessary to access the pump and rail connections.
- When separating fittings, support the pipe to avoid twisting or bending. Use proper flare‑line or injection‑line wrenches to prevent damage.
- Always replace sealing washers (copper crush washers) at the fittings; reusing old washers commonly leads to leaks.
- Tighten line fittings to the manufacturer’s specified torque using a calibrated torque wrench. If torque values are unknown, consult the workshop manual for the exact figure.
- After installation, check for leaks by running the engine and visually inspecting all connections. Re‑check torque after a short test drive.
- Observe standard safety: no open flames, adequate ventilation and personal protective equipment when working with diesel fuel.
Why This Part Fails Most Often
Common causes of failure include corrosion from moisture or contaminants, vibration and metal fatigue that lead to cracks, damage during previous service (bending or overtightening), and degraded sealing washers at the flare/banjo connections. Small leaks often start at the fittings and, if left unattended, can lead to larger fuel loss, pressure drop in the rail and poor engine performance.
Fitment And Search Tips
Customers and workshops often search for this part by the code 1570F1 or by vehicle models equipped with the 1.4 HDI 16V (8HY) engine. Confirm engine code and visual match of the pipe routing when replacing to ensure correct fitment.
Order this outlet pipe to restore leak‑free high‑pressure fuel delivery to your RAIL system and keep your Citroën or Peugeot running reliably.
