Description
Thermostat Housing CITROEN PEUGEOT 2.2 HDI 9643212480 from PEUGEOT 607 2.2 HDI 98 kW – fits CITROEN C5 C8 PEUGEOT 406 and 607 807. Fully functional, uncracked part.
Product Overview
High-quality thermostat housing designed for Citroën and Peugeot 2.2 HDi diesel engines. This housing is a direct-fit replacement used on multiple Stellantis models and carries several manufacturer reference numbers. It is suitable for professional workshops and experienced DIY mechanics who maintain or repair cooling systems on older HDi engines.
Function And Role
The thermostat housing secures the thermostat and directs coolant flow between the engine and the radiator. It ensures the thermostat operates in a stable environment, prevents coolant leakage at the thermostat junction and often integrates ports for coolant hoses and temperature sensors. A sound housing is essential for correct temperature regulation and avoiding local coolant loss.
Compatibility
Fits Vehicles And Engines:
- Peugeot 607 2.2 HDi (98 kW)
- Peugeot 406 (selected 2.2 HDi variants)
- Peugeot 807 (selected 2.2 HDi variants)
- Citroën C5 (selected 2.2 HDi variants)
- Citroën C8 (selected 2.2 HDi variants)
Installation Instructions
Basic Replacement Steps (for experienced mechanics):
- Allow Engine To Cool Completely. Work on a cold engine to avoid burns and pressure in the cooling system.
- Drain Coolant Safely Into A Container.
- Remove Any Components Blocking Access (Air Intake, Engine Covers, Hoses).
- Disconnect Coolant Hoses From The Housing And Remove Mounting Bolts.
- Remove Old Housing, Clean Mating Surfaces Thoroughly And Remove Old Gasket Material.
- Fit A New Gasket Or O-Ring; Install New Or Inspected Thermostat If Required.
- Install New Housing, Tighten Bolts To Manufacturer Torque Specification, Reconnect Hoses.
- Refill Cooling System With Correct Type And Mixture Of Coolant; Bleed Air From The System According To Manufacturer Procedure.
- Start Engine, Warm Up, Check For Leaks And Recheck Coolant Level After A Short Test Drive.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: 2.2 HDi Applications (Peugeot 607, 406, 807; Citroën C5, C8)
- Product Codes: 9641337880, 1336R3
- Other Numbers: 9643212480
Installation Recommendations
- Always Replace The Gasket Or O-Ring When Installing A New Housing To Ensure A Leak-Free Seal.
- Inspect And Replace Any Aged Or Brittle Hoses And Hose Clamps During Service.
- Consider Replacing The Thermostat At The Same Time To Avoid Repeating The Job.
- Use A Torque Wrench And Follow Manufacturer Bolt Torque Values To Prevent Cracking The Housing.
- Use The Correct Coolant Type And Correct Mixing Ratio; Flush The System If Contaminated.
Most Common Failure Causes
Thermostat housings commonly fail due to material fatigue and thermal cycling—especially on plastic housings—leading to cracks and coolant leaks. Corrosion from neglected or incorrect coolant, degraded seals or O-rings, and local overheating or pressure spikes (from cooling system faults or head gasket issues) also cause premature failure. Failures are more likely on higher-mileage vehicles or where coolant maintenance has been irregular.
Why Choose This Part
This housing is a practical replacement for workshops and competent DIY mechanics who need a reliable, directly fitting component for 2.2 HDi cooling systems. It arrives uncracked and ready for installation; pairing the housing replacement with fresh seals and a thermostat reduces the chance of repeat work and improves long-term cooling reliability.
Order this thermostat housing when replacing a leaking or damaged thermostat junction to restore correct coolant routing and prevent engine overheating.
