Description
Oil filter housing for 1.6 HDi 16V engines for Citroën and Peugeot vehicles with an oil–coolant heat exchanger.
Premium-quality oil filter housing designed for 1.6 HDi 16V diesel engines used in a wide range of Citroën and Peugeot models. The integrated oil-to-coolant heat exchanger helps regulate oil temperature, improving engine longevity and performance under varied driving conditions. This housing is commonly sought by mechanics and DIY enthusiasts under part numbers 1103N9 and 1103K2. Built to replace worn or leaking housings, it restores reliable oil flow and prevents coolant/oil cross-contamination when installed with new seals and correct procedures.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model(s): Citroën Berlingo, Citroën C2, Citroën C3, Citroën C4, Citroën C4 Picasso, Citroën C5, Citroën Xsara Picasso, Peugeot 206, Peugeot 307, Peugeot 407, Peugeot Partner
- Product Codes: 1103N9, 1103K2
- Additional Numbers: N/A
Function And Benefits
- Provides a mounting point for the oil filter and directs engine oil through the integrated oil-to-coolant heat exchanger.
- Helps maintain optimal oil temperature during engine operation, reducing wear and improving efficiency.
- Replaces aged or damaged housings to stop external leaks and prevent internal coolant/oil contamination.
Common Failure Causes
- Gasket Or O-Ring Deterioration: Rubber seals harden or crack over time, causing external oil or coolant leaks.
- Plastic Or Metal Fatigue: Thermal cycling and vibration can crack the housing body, leading to leaks.
- Heat Exchanger Corrosion Or Blockage: Internal corrosion or clogging can allow oil and coolant to mix or reduce cooling efficiency.
- Improper Installation Or Over-Tightening: Can damage sealing surfaces and cause leaks shortly after replacement.
How To Replace (Overview)
- Allow The Engine To Cool Thoroughly Before Work.
- Drain Engine Oil And Coolant Into Suitable Containers.
- Remove Any Components Obstructing Access (Hoses, Wiring Brackets, Intake Parts).
- Unscrew The Housing Bolts, Remove Old Housing, Replace Seals/O-Rings And, If Applicable, Replace The Heat Exchanger.
- Refit The Housing With New Gaskets, Tighten Bolts To Manufacturer Torque Values, Refill Oil And Coolant.
- Bleed The Cooling System, Start The Engine And Check For Leaks; Replace Oil Filter And Monitor Fluids For Contamination.
Installation Recommendations
- Always Use New Gaskets And O-Rings When Installing The Housing.
- Replace The Engine Oil And Oil Filter After Installation; Contaminated Oil May Require A Full Oil And Filter Service.
- Ensure Cooling System Is Properly Bleed To Avoid Overheating; Inspect Hoses And Fasteners While Accessible.
- Use Appropriate Tools And A Torque Wrench To Avoid Damaging Threads Or Deforming The Housing.
- If You Detect Oil In The Coolant Or Vice Versa, Perform A Full Fluid Flush To Prevent Engine Damage.
Why Replace This Part Now
Leaks or mixing of oil and coolant can quickly lead to severe engine damage. Early replacement of a failing oil filter housing prevents contamination, maintains correct oil pressure and temperature, and avoids costly repairs. If you observe external leaks, white smoke, milky oil, unexplained coolant loss, or overheating, inspect the housing and associated seals immediately.
Order by Part Number (1103N9 / 1103K2) to ensure fast identification in workshop catalogs and e-commerce searches. Suitable for professional garages and experienced DIY mechanics performing engine maintenance on Citroën and Peugeot 1.6 HDi 16V vehicles.
