Description
Feed pipe for diesel injection to the second cylinder for the fuel rail in 1.4 HDi and 1.6 HDi eHDI engines.
This fuel rail feed pipe (intended for the second cylinder) is an OEM-fit part commonly used on Citroën and Peugeot 1.4 HDi and 1.6 HDi eHDI engines. It ensures precise, leak-free delivery of high-pressure diesel from the rail to the injector connection point. The part number 1570Q0 is frequently searched by mechanics and DIY enthusiasts when replacing damaged or leaking high-pressure fuel lines. Manufactured to match original geometry and connection fittings, this pipe helps restore correct fuel pressure balance and injector sealing for smooth engine running and reliable combustion.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: 1.4 HDi, 1.6 HDi eHDI
- Product Codes: 1570Q0
- Additional Numbers: No additional numbers provided
Function And Application
The feed pipe transmits high-pressure diesel between the common rail and the injector location for cylinder No. 2. It is part of the high-pressure injection circuit and must provide an absolute seal under pulsating pressures typical for HDi injection systems. Correct pipe fitment and sealing washers are essential to prevent fuel leaks, pressure loss and subsequent performance or safety issues.
How To Replace
- Prepare: Work in a well-ventilated area, wear eye protection and gloves, and have replacement sealing washers ready.
- Depressurize The Fuel System: Follow the workshop procedure to relieve rail pressure before loosening any high-pressure fittings.
- Access: Remove any engine covers or components blocking access to the rail and injector unions.
- Remove Old Pipe: Carefully loosen the union nuts at both ends (rail and injector). Catch any drips and avoid contaminating the fuel system.
- Fit New Pipe: Install new sealing washers where required and tighten the union nuts to the manufacturer’s specified torque values.
- Prime And Check: Re-pressurize the system, run the engine and inspect all joints for leaks. Recheck torque after initial run-in.
Installation Recommendations
- Use Correct Sealing Washers: Always replace copper or crush washers on high-pressure unions to ensure a leak-free connection.
- Clean Working Area: Prevent dirt from entering injectors or the rail. Cap open ports immediately.
- Tighten To Spec: Use the manufacturer’s torque settings for union nuts; avoid over-tightening which can damage threads or deform fittings.
- Inspect Surrounding Components: Check injectors, rail brackets and clips for wear or damage during replacement.
- Test For Leaks: After installation, run the engine at idle and under light load to ensure there are no visible leaks and no fuel smell.
Why The Part Fails Most Often
- Corrosion Or Material Fatigue: Exposure to moisture and contaminants can corrode or weaken the metal, causing cracks or fractures.
- Vibration And Mechanical Stress: Engine vibration and poor support/clips can lead to fatigue and eventual failure.
- Improper Installation: Reuse of old sealing washers, incorrect torque or contaminated connections may cause leaks.
- Fuel Contamination: Particles or water in fuel can accelerate wear at joints and connectors.
Part number 1570Q0 is commonly used as a search term when sourcing this component for Citroën and Peugeot HDi applications. Replacing the feed pipe promptly at the first sign of leakage or damage prevents loss of fuel pressure, injector malfunction and potential safety hazards from diesel leaks.
