Description
Alternator VALEO CL18 for 2.0 and 2.2 HDi engines for Citroën and Peugeot vehicles. With freewheel pulley.
Product Overview
This Valeo CL18 alternator (180 A) is a direct-fit replacement commonly used on PSA 2.0 and 2.2 HDi diesel engines. It features a freewheel (one-way) pulley that improves belt life and reduces driveline vibration. Ideal for professional workshops and experienced DIY mechanics searching by part number (OEM codes listed below).
Key Benefits
- High output: 180 A rating suitable for vehicles with increased electrical demand (diesel engines with auxiliary systems).
- Freewheel Pulley: Reduces shock loads to the belt and alternator bearings during engine deceleration, extending component life.
- Direct Fit: Designed to match mounting points and electrical connectors used on many Citroën and Peugeot HDi models.
- Searchable by Part Numbers: Frequently found in searches by OEM codes—improves findability in online catalogs and Google.
Technical Information
- Manufacturer: Valeo
- Model: CL18 (180 A)
- Product Codes: 9661544880, 9688085380, 5702K8, 5705AX, 5705EE, 5705JF, 5705E7, 5705NG, 5702F4, 5702G2
- Other Numbers: 180 A; Freewheel Pulley (One-Way)
Compatibility / Typical Applications
Fits many Citroën and Peugeot models equipped with 2.0 and 2.2 HDi engines. Common applications include (examples): Citroën C5, Citroën C6, Peugeot 407, Peugeot 508, Peugeot 607. Always verify fitment by comparing mounting points, connector type and part numbers.
Installation Recommendations
- Safety First: Disconnect the negative battery terminal before any work to prevent short circuits.
- Access: Remove engine covers and loosen the drive belt via the belt tensioner to relieve tension from the alternator pully.
- Electricals: Disconnect the main power cable and control connector(s) before unbolting the alternator.
- Mounting: Support the alternator when removing bolts. When installing, ensure correct orientation of the freewheel pulley and tighten mounting bolts to the manufacturer’s torque specifications.
- After Installation: Refit the drive belt and set correct tension. Check charging system voltage at idle and under load (typically around 13.8–14.6 V with engine running).
- Additional Checks: Inspect belt condition and belt tensioner; a worn tensioner or belt can shorten alternator life.
Most Common Failure Reasons
- Worn Brushes And Slip Rings: Gradual wear leads to poor electrical contact and reduced charging output.
- Diode Rectifier Or Voltage Regulator Failure: Causes loss of charging, battery drainage or electrical noise.
- Bearing Wear Or Seizure: Leads to abnormal noise and eventual pulley failure; more likely if contaminated by oil or coolant.
- Contamination: Oil, coolant leaks or excessive road dirt reduce cooling and accelerate internal wear.
- Drive Belt Issues: Over-tensioned or slipped belts increase mechanical stress on the pulley and bearings; incorrect pulley orientation can also cause premature failure.
- Electrical Overload: Vehicles with added electrical accessories may exceed alternator capacity, shortening lifespan.
Service Life And Symptoms
Typical service life varies with use and maintenance but alternators on diesel HDi engines commonly last between 100,000 and 200,000 km. Early warning signs include dimming lights, battery charging warnings on the dash, unusual noises from the front of the engine, and frequent battery voltage drops.
Notes For Mechanics And DIYers
This part is suitable for fitment by experienced technicians and competent DIYers. Always compare the replacement alternator’s electrical connector, mounting points and pulley type with the original unit. Searching by one of the listed OEM part numbers is an efficient way to confirm compatibility.
Why Choose This Alternator
The Valeo CL18 180 A alternator offers a high-output, direct-fit solution for PSA HDi diesel engines where a robust charging system and freewheel pulley advantages are required. Part-number searchable and optimized for vehicles with higher electrical loads, it is a practical option for garages and skilled home mechanics needing a reliable replacement.
