Description
Air conditioning pipe for Peugeot 4007 and Citroën C-Crosser 2.2 HDi
This air conditioning pipe (AC line) is designed for direct fitment to Peugeot 4007 and Citroën C-Crosser with the 2.2 HDi engine. Built to restore proper refrigerant circulation and system pressure, the pipe is a common-service item when repairing leaks or after collision damage. Ideal for professional workshops and experienced DIY mechanics, this part helps return the climate system to factory performance while matching original mounting points and connection fittings.
Function And Application
The pipe carries refrigerant between key components of the air conditioning system. It ensures sealed transfer of high‑ and low‑pressure refrigerant between the condenser, evaporator, receiver/drier (or accumulator) and compressor depending on the specific routing in the 2.2 HDi installation. Correct fitment prevents leaks, pressure drops and contamination of the circuit.
Replacement Procedure (Overview)
- Recover Refrigerant: Safely evacuate refrigerant using appropriate recovery equipment in a certified manner before any work on the AC circuit.
- Release Pressure And Remove Mounts: Remove clamp and bracket fastenings, then disconnect the pipe at quick‑connect fittings or flare joints as applicable.
- Replace Seals: Fit new O‑rings/seals at every connection and lubricate with the correct type and amount of PAG oil if the joint requires it.
- Install New Pipe: Align pipe to original routing, secure all brackets and torque fittings to manufacturer specifications where available.
- Evacuate And Recharge: Evacuate the system with a vacuum pump to remove moisture, then recharge with the correct refrigerant type and specified charge weight.
- Leak Test And Function Check: Perform a pressure and electronic function check; verify compressor engagement and system pressures with manifold gauges.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Peugeot 4007; Citroën C-Crosser 2.2 HDi
- Product Codes: 6477R3
- Other Numbers: Not Available
Installation Recommendations
Work Should Be Carried Out By A Qualified Technician Or By A Mechanic With The Correct Tools: always use proper refrigerant recovery and charging equipment. Replace All O‑Rings And Apply Correct Lubricant: old seals commonly cause leaks after reassembly. Observe Tightening Torques And Routing: prevent chafing against adjacent components and secure all clips to avoid vibration fatigue. After Installation, Perform A Full System Evacuation And Recharge To Specified Refrigerant Charge And Test For Leaks.
Why This Part Fails Most Often
Common causes of failure are external damage from road debris or collision, corrosion at exposed metal sections or fittings, deterioration of O‑rings and seals, and vibration‑induced cracking at bends or connection points. Small leaks often start at joint seals or where the pipe rubs against other components. Regular inspection after bodywork or underbody repairs reduces the risk of unnoticed damage leading to system performance loss.
Keywords: AC Pipe Peugeot 4007, Air Conditioning Pipe Citroën C-Crosser, 6477R3, AC Line 2.2 HDi.
