Description
Hose (Pipe) Of The Coolant Pump To The Thermostat For 1.8 16V And 2.0 16V Engines.
This replacement coolant pump-to-thermostat hose is a direct-fit part for select Citroën and Peugeot petrol engines (1.8 16V and 2.0 16V). Designed for professional workshops and competent DIY enthusiasts, the hose restores reliable coolant circulation, helps eliminate leaks, and supports stable engine temperature control. Commonly searched by part number 1341F9, it is an essential item when addressing cooling-system maintenance or repair jobs.
Function
The hose connects the coolant pump outlet to the thermostat housing, directing engine coolant through the thermostat and the cooling circuit. Its role is critical for maintaining correct engine operating temperature and ensuring efficient warm-up, heater performance, and preventing overheating.
Fitment
Fits vehicles equipped with 1.8 16V and 2.0 16V engines. Typical applications include:
- Citroën C4
- Citroën C4 Picasso
- Peugeot 307
- Peugeot 407
Part Number: 1341F9 (commonly used search reference).
How To Replace
- Allow The Engine To Cool Completely Before Starting Work.
- Drain Coolant To A Level That Prevents Spillage When Removing The Hose Or Partially Disconnect The Radiator Overflow If Needed.
- Loosen Hose Clamps Or Remove Fasteners Securing The Hose To The Coolant Pump And Thermostat Housing.
- Remove The Old Hose And Inspect Mating Surfaces, Thermostat Housing, And Coolant Pump For Corrosion Or Damage.
- Fit The New Hose In The Correct Orientation; Replace Any O-Rings Or Seals If Present And Use New Hose Clamps Or Reuse High-Quality OEM-Style Clamps.
- Refill The Cooling System With Manufacturer-Specified Coolant And Bleed The System According To The Vehicle Manufacturer Procedure.
- Start The Engine, Bring To Operating Temperature, Check For Leaks, Recheck Coolant Level After A Short Drive.
Recommended Installation
Use New Clamps: Replace worn or corroded clamps with quality clamps to ensure a lasting seal. Inspect Adjacent Components: Check Thermostat, Water Pump, And Radiator Hoses For Wear When Replacing This Hose. Use Manufacturer-Specified Coolant: Refill With The Recommended Coolant Type And Concentration. Proper Bleeding: Follow The Bleeding Procedure To Remove Air Pockets; Improper Bleeding Can Cause Local Overheating. Work With A Clean Workspace: Prevent Debris From Entering The Cooling System During Replacement.
Why The Part Fails Most Often
Hose failure is typically caused by age-related degradation from heat cycling, exposure to engine oil or contaminants, repeated pressure fluctuations, and clamp failure. Overheating events accelerate material breakdown. External abrasion or contact with sharp edges and improper installation are also common causes of leaks.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4; Citroën C4 Picasso; Peugeot 307; Peugeot 407
- Product Codes: 1341F9
- Other Numbers: Not Available
Additional Notes
When replacing cooling-system hoses, consider changing related parts showing wear (clamps, adjacent hoses, thermostat). Using the correct part number (1341F9) increases the chance of a perfect fit. Ideal For: Garage Repairs, Scheduled Maintenance, And DIY Cooling-System Overhauls.
