Description
Product Overview
This intake air coolant heat exchanger (intake air preheater) is a direct-fit component for PSA Group diesel engines 2.0 and 2.2 HDi fitted to Citroën C8 and Peugeot 807 models. The unit uses engine coolant to warm incoming air, improving cold-start response, combustion stability and emissions control under low-temperature conditions.
Features And Benefits
- Direct replacement for OE codes 9640450780, 144200, 144207.
- Improves cold-start performance and reduces white exhaust smoke on cold engines.
- Designed for workshop and DIY installation with common hand tools.
Common Symptoms And Failure Modes
Typical signs that the heat exchanger needs replacement include coolant loss, visible leaks or wet spots around the unit or hoses, reduced heating/cold-start performance and contamination of the intake tract with coolant residue. Failures most often result from internal corrosion, scale build-up from contaminated coolant, degraded seals or damaged hose connections.
Replacement And Installation Notes
Replacement should be performed by a qualified mechanic or a competent DIY technician. Typical procedure:
- Depressurise the cooling system and disconnect the battery.
- Drain the coolant below the level of the exchanger to avoid spills.
- Remove intake ducting and hoses to access the heat exchanger.
- Unbolt the exchanger from its bracket and disconnect coolant lines; retain or replace O-rings and clamps as required.
- Fit the new unit, install new seals where applicable, reassemble intake plumbing and refill the cooling system with the correct specification coolant.
- Bleed the cooling system thoroughly, start the engine and inspect for leaks and correct operation.
Maintenance And Service Advice
There is no fixed service interval for this component; replace when leaking, blocked or when intake contamination occurs. Inspect the exchanger during routine cooling-system maintenance and when replacing hoses, thermostat or performing coolant flushes. Use manufacturer-specified coolant to reduce corrosion and deposits.
Technical Information
- Manufacturer: PSA (Citroën / Peugeot)
- Model: Citroën C8; Peugeot 807 (2.0 HDi, 2.2 HDi)
- Product Codes: 9640450780, 144200, 144207
- Additional Numbers: No additional numbers provided
Compatibility And Notes
This part is commonly searched by OE product numbers; always verify fitment against the vehicle VIN and engine code before ordering. Suitable for professional workshops and experienced home mechanics working on PSA 2.0 / 2.2 HDi diesel platforms.
