Water Hose Citroën Peugeot 2.0 HDI 6466VF

Description

Coolant pipe to the heater heat exchanger for Citroén and Peugeot vehicles with the 2.0 HDI RH02 engine.

This replacement coolant hose connects the engine cooling circuit to the heater core (heater heat exchanger) on Citroën and Peugeot cars with the 2.0 HDI RH02 powerplant. Designed for professional workshops and skilled DIY mechanics, the part restores proper coolant flow to the cabin heating system, prevents leaks and helps maintain correct engine temperature regulation. Ideal when the original pipe shows cracks, swelling, hardening or leaking at connection points. Commonly searched by part number 6466VF, this hose is a direct-fit solution for a range of Stellantis vehicles.

Compatible Vehicles

Typical models this part fits include:

• Citroën C4 II
• Citroën C4 Picasso II
• Citroën C5 X7
• DS4
• DS5
• Peugeot 3008 I
• Peugeot 308
• Peugeot 5008 I

Technical Information

• Manufacturer: Stellantis (Citroén/Peugeot)
• Model: 2.0 HDI RH02 – Heater Heat Exchanger Pipe
• Product Codes: 6466VF
• Other Numbers: Engine Code RH02

Function And Benefits

The hose routes engine coolant to and from the heater core (heater heat exchanger) located behind the dashboard. It ensures efficient transfer of engine heat into the cabin heating system. Replacing a degraded hose eliminates leaks, prevents coolant loss and avoids air ingress into the cooling system, improving heater performance and protecting the engine from overheating.

Replacement Procedure

1. Work only on a cold engine. Release cooling system pressure and drain coolant to below the level of the heater core connections.
2. Access the heater hose connection points—this may require removing under-dash panels or accessing the engine bay depending on the model.
3. Loosen and remove hose clamps at both ends. Note clamp type and position for reinstallation.
4. Disconnect the old pipe from the heater core and engine fittings. Inspect mating surfaces and replace any worn O-rings or seals.
5. Fit the new pipe, ensuring correct seating and orientation. Install new clamps or reuse OEM-style clamps tightened securely but without over-compressing the hose.
6. Refill cooling system with manufacturer-approved coolant and bleed air from the system (run engine with heater on, open bleed screws where fitted) until stable temperature and no air pockets remain.
7. Check for leaks with the engine at operating temperature and re-torque clamps if necessary.

Installation Recommendations

• Always Replace Clamps And Seals: Use new clamps and any required O-rings/gaskets to ensure a reliable seal.
• Use Manufacturer-Approved Coolant: Refill with the coolant type specified by Citroén/Peugeot to protect alloys and rubber components.
• Inspect Adjacent Components: Check nearby hoses, heater core connections and thermostat housing for signs of wear or corrosion; replace as needed.
• Bleed The Cooling System Thoroughly: Follow the vehicle-specific bleeding procedure to avoid trapped air and overheating.
• Safety: Wear gloves, work on a cold engine and dispose of old coolant according to local regulations.

Most Common Reasons For Failure

Heater inlet/outlet pipes and hoses typically fail due to age-related degradation of the rubber (hardening, cracking), prolonged exposure to heat cycles and pressure fluctuations, chemical attack from contaminated coolant, or mechanical damage from poor clamp placement or vibration. Failure often appears as visible cracks, soft spots, swelling or slow leaks at hose joins.

When To Replace

Replace the hose if there are any signs of leakage, visible damage, softening or if it becomes loose at connection points. Proactive replacement is recommended during major cooling system repairs, after overheating events, or when replacing the heater core or thermostat to ensure long-term reliability.