Description
Refrigerant pipe for Citroën and Peugeot vehicles with the 2.0 HDi RHR engine.
This air conditioning refrigerant pipe is a direct-fit component for Citroën and Peugeot models equipped with the 2.0 HDi RHR diesel engine, commonly used on the Citroën C4 Picasso. Manufactured to meet OE dimensions and mounting points, the pipe restores proper refrigerant routing between condenser, evaporator and compressor to ensure efficient cabin cooling. Ideal for professional workshops and DIY mechanics who search by reference number (9685503180, 9656859280, 6477D7), this part helps eliminate leaks, restore system pressure and prolong service life of the AC circuit.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 Picasso; Applicable To Vehicles With 2.0 HDi RHR Engine
- Product Codes: 9685503180, 9656859280, 6477D7
- Other Numbers: 6460XF, NFP
Function And Benefits
The refrigerant pipe carries refrigerant under pressure between AC components. A correctly fitted pipe prevents loss of refrigerant and oil, maintains system pressure, and ensures the compressor and evaporator operate within design parameters. Replacing a damaged pipe restores cooling performance, reduces compressor load and prevents contamination of the AC system.
Replacement Procedure
- Recover Refrigerant: Evacuate and recover refrigerant using certified recovery equipment before any disassembly.
- Access And Remove: Gain access to the pipe by removing any obstructing trim or brackets. Loosen and remove fittings and clamps securing the pipe.
- Fit New Pipe: Install the replacement pipe with new OEM-quality O-Rings or seals lubricated with the correct refrigerant oil.
- Vacuum And Recharge: Evacuate the system to remove moisture and air, perform a leak test, then recharge with the manufacturer-specified refrigerant and oil quantities.
- Final Check: Run the AC system, verify pressures and temperatures, and inspect all connections for leaks.
Installation Recommendations
- Use Appropriate Equipment: Always use certified AC recovery, vacuum and charging equipment operated by trained personnel.
- Replace Seals: Fit new O-Rings/seals at all mating connections; reuse of old seals increases risk of leaks.
- Lubrication: Apply the correct type and amount of refrigerant oil to O-Rings and connections to ensure proper sealing.
- System Cleanliness: Ensure the AC system is free of debris and contaminated oil before installing the new pipe to avoid compressor damage.
- Leak Test: Perform an electronic or dye-assisted leak test after installation and before system recharge.
Most Common Failure Causes
- Corrosion From Road Salt Or Moisture: Metal pipes can corrode over time, leading to slow or sudden leaks.
- Mechanical Damage: Impact from road debris or improper jack/tow points can kink or crack the pipe.
- Seal Degradation: O-Rings and seals harden with age and heat, causing refrigerant loss at connections.
- Vibration And Fatigue: Repeated vibration and engine movement can cause fatigue cracks at bends or joints.
- Contamination: Debris or degraded oil in the system can accelerate wear and cause internal restrictions or leaks.
Search Keywords: Citroën C4 Picasso refrigerant pipe 9685503180 9656859280 6477D7 6460XF. Suitable for professional garages and competent DIY mechanics familiar with AC system service and safe refrigerant handling.
