Description
Fuel injection supply pipe to the fourth cylinder for the rail in 1.4 HDi and 1.6 HDi e-HDi engines
This used fuel feed pipe is a direct replacement for the high‑pressure rail line feeding the fourth cylinder on many Citroën and Peugeot HDi engines. It restores correct diesel delivery to the injector and prevents fuel leaks that cause rough running, loss of power or smoke. Frequently searched by part number 1570Q2, this component is ideal for professional workshops and experienced DIY mechanics who need a reliable, cost‑effective repair part.
Application And Benefits
Designed for rail injection systems in 1.4 HDi and 1.6 HDi e‑HDi engines, the pipe ensures precise fuel metering and pressure integrity at the injector inlet. Replacement eliminates common symptoms of a failing feed pipe such as visible leakage at the rail or injector, fuel odour in the engine bay, engine misfire under load, and difficulty starting. Because the fuel system works under very high pressure, a properly fitting pipe and intact sealing washers are essential for safe, efficient operation.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën And Peugeot Vehicles With 1.4 HDi And 1.6 HDi e‑HDi Engines
- Product Codes: 1570Q2
- Additional Numbers: N/A
Recommended Installation
Replacement of the rail feed pipe should be performed by a competent technician or an experienced DIYer who is familiar with high‑pressure diesel systems. Typical replacement steps:
- Relieve Fuel System Pressure Before Work. Follow manufacturer procedures to depressurize the common rail system to avoid fuel spray.
- Work In A Well‑Ventilated Area. Avoid open flames and smoking near the vehicle.
- Remove Engine Covers As Required And Clean The Surrounding Area To Prevent Contamination Of The Injection System.
- Carefully Disconnect The Old Pipe From The Rail And Injector. Preserve Or Replace Crush Washers/Seals As Required.
- Fit The New Pipe With New Sealing Washers. Ensure Correct Alignment To Avoid Stress On Connections.
- Tighten Connections To Manufacturer Torque Specifications Using A Torque Wrench; Do Not Overtighten.
- After Installation, Prime The Fuel System And Start The Engine. Inspect All Connections For Leaks Under Idle And Load.
Recommended Tools: Torque Wrench, Proper Fuel Line Wrenches, Clean Rags, Safety Gloves, Eye Protection. Replace Crush Washers Or Seals During Assembly.
Why The Part Typically Fails
Feed pipes are exposed to vibration, heat cycles and sometimes corrosive conditions under the bonnet. Common failure causes include corrosion or pitting of the metal, cracking from vibration or improper bending, damaged or hardened sealing washers causing leaks, and accidental impact or contact during previous servicing. Failures most often appear after long service life (often beyond 100,000 km depending on use and environment) or following mechanical damage.
Practical Tips
- Always Replace Sealing Washers When Refitting The Pipe To Ensure A Leak‑Free Joint.
- Check Injectors And Rail For Signs Of Damage Or Contamination When A Leak Is Found.
- If You See Any Fuel Smell Or Visible Leak After Installation, Stop The Engine Immediately And Recheck Connections.
Search Advice
Customers often search by part number. Use code 1570Q2 when looking for matching components for Citroën and Peugeot HDi engines to quickly identify compatible replacements.
