Description
Alternator Valeo CL18 for 2.0 and 2.2 HDi engines for Citroën and Peugeot. With Freewheel Pulley.
This Valeo CL18 180A alternator is designed for PSA Group diesel engines and delivers high charging capacity for vehicles with heavy electrical loads. Ideal for professional workshops and experienced DIY mechanics, this unit features a freewheel (one-way) pulley to reduce belt shock and extend accessory drive life. The alternator restores reliable charging performance, stabilizes onboard electronics and improves battery charging under demanding conditions.
Technical Information
- Manufacturer: Valeo
- Model: CL18, 180A, Freewheel Pulley
- Product Codes: 180A, CL18, CL189661544880
- Additional Numbers: 9661544880, 9688085380, 5702K8, 5705AX, 5705EE, 5705JF, 5705E7, 5705NG, 5702F4, 5702G2
Function And Typical Application
The alternator charges the vehicle battery and supplies electrical systems while the engine is running. With a nominal output of 180 amps, it is suitable for vehicles with higher electrical demands (heated seats, powerful audio, additional lighting, etc.). It is intended for cars equipped with 2.0 and 2.2 HDi diesel engines from the PSA group and is commonly found on mid-sized passenger cars and some commercial variants from Citroën and Peugeot.
Replacement Procedure
- Disconnect the negative battery terminal before any work.
- Release tension and remove the drive belt (note routing) and/or serpentine belt.
- Disconnect electrical connectors and remove the alternator mounting bolts.
- Remove the old alternator and compare mounting points, plug types and pulley orientation to the replacement.
- Install the replacement alternator, tighten mounting bolts to manufacturer specifications, reconnect electrical connectors and refit the drive belt with correct tension.
- Reconnect the battery and verify charging system operation (charging voltage typically around 13.8–14.6 V at idle under normal conditions).
Installation Recommendations
- Always Disconnect The Battery Before Work To Avoid Short Circuits And Damage.
- Observe Manufacturer Bolt Torque Values And Belt Tension Specifications.
- Replace The Drive Belt And Tensioner If They Show Signs Of Wear Or Damage.
- Check Battery Health Before And After Installation; A Weak Battery Can Overload A New Alternator.
- Inspect Electrical Connectors For Corrosion And Ensure Clean, Secure Contacts.
- After Installation, Measure Charging Voltage And Listen For Unusual Noises (Bearing Or Pulley Issues).
Most Common Failure Causes
- Worn Bearings Causing Noise And Increased Mechanical Resistance.
- Diode Or Voltage Regulator Failure Leading To Poor Charging Or Electrical Spikes.
- Brush Wear Resulting In Intermittent Charging.
- Contamination From Oil Or Coolant Leaks Causing Electrical Faults.
- Excessive Belt Slip Or Incorrect Tension Increasing Mechanical Load.
- Electrical Overload From Faulty Accessories Or A Weak Battery.
Choosing a correct-fit alternator by matching product numbers listed in the Technical Information increases the chance of direct replacement without modifications. For workshop installation, follow the vehicle manufacturer’s service manual for exact procedures and torque values.
