Description
Coolant pipe to the heater core for Citroën and Peugeot vehicles with 2.0 HDi RH02 engine.
This coolant pipe connects the engine cooling circuit to the heater core (heater matrix) and ensures reliable flow of engine coolant to deliver cabin heating and to maintain correct thermal balance in the cooling system. Designed for vehicles equipped with the 2.0 HDi RH02 engine, the pipe is identified under the code 6466VE and fits a range of Citroën, DS and Peugeot models. Robust construction resists ordinary vibration and pressure cycles, while correct installation restores efficient heater performance and prevents leaks that can lead to coolant loss or overheating.
Benefits
– Direct replacement for vehicles using the 2.0 HDi RH02 engine, restoring proper heater and cooling circuit operation.
– Reduces risk of coolant leaks and subsequent engine overheating when replaced at first signs of wear.
– Improves cabin heating response by ensuring full coolant flow through the heater core.
Replacement Procedure
Replacement is straightforward for an experienced mechanic: allow the engine to cool, drain the cooling system or isolate the heater circuit to avoid spills, loosen hose clamps at both ends (heater core connection and engine/pipe connection), remove the old pipe and clean mating surfaces. Fit the new pipe with new clamps or OEM-style fasteners and any required seals or O-rings, refill the cooling system with the correct coolant mixture, and bleed air from the circuit according to manufacturer procedure. After installation, run the engine to operating temperature and check for leaks and correct heater function.
Installation Recommendations
- Work Only When The Engine Is Cold: Open the cooling system only when the engine is cold to avoid scalding.
- Drain And Capture Coolant Safely: Use appropriate containers and dispose of coolant according to local regulations.
- Replace Clamps/Seals: Always fit new clamps and any seals/O-rings removed during the job to ensure leak-free joints.
- Bleed The System Thoroughly: Remove trapped air to avoid overheating and ensure consistent heater performance.
- Inspect Adjacent Components: Check heater core connections, thermostat, water pump and nearby hoses for wear while the system is open.
- Use Correct Coolant: Refill with the manufacturer-recommended coolant type and concentration.
Most Common Failure Causes
- Aging And Material Degradation: Rubber and composite pipes harden, crack or become porous after prolonged exposure to heat and coolant chemicals.
- Heat Cycles And Vibration: Repeated thermal expansion and engine vibration promote hose loosening, cracking or joint failure.
- Incorrect Clamping Or Installation: Over-tightening or under-tightening clamps can cause leaks or local damage to the hose.
- Chemical Contamination Or Poor Coolant Maintenance: Incorrect coolant mix or contamination accelerates deterioration.
- Overheating Events: Repeated or prolonged engine overheating can weaken hose materials and joints.
Compatibility
Typical vehicle applications include, but may not be limited to:
- Citroën C4 II
- Citroën C4 Picasso II
- Citroën C5 X7
- DS4
- DS5
- Peugeot 3008 I
- Peugeot 308
- Peugeot 5008 I
Technical information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Vehicles with 2.0 HDi RH02 engine (see compatibility list)
- Product codes: 6466VE
- Other numbers: 2.0 HDi (RH02)
Order part 6466VE to restore reliable heater circuit operation and prevent coolant leaks. Suitable for professional workshops and experienced DIY mechanics; follow safe working practices and the vehicle manufacturer’s service instructions during replacement.
