Description
Valeo CL18 Alternator For 2.0 And 2.2 HDi Engines For Citroën And Peugeot Vehicles. With A Freewheeling Pulley.
This high-output Valeo CL18 alternator (180A) is designed for Citroën and Peugeot vehicles powered by 2.0 and 2.2 HDi diesel engines. Ideal for professional workshops and experienced DIY mechanics, this unit delivers stable charging performance for modern vehicles with increased electrical demands (start‑stop systems, advanced infotainment, auxiliary heaters, etc.). Customers frequently search by OE or part number—see the Technical Information section below for all relevant references.
Key Features
- High Output: 180 Amp rating suitable for vehicles with heavy electrical loads.
- Valeo CL18 Platform: Common OE design used on multiple Citroën and Peugeot HDi applications.
- Freewheeling (Overrunning) Pulley: Reduces belt shock and vibrations during engine deceleration, improving belt life and driveline smoothness.
- Integrated Electronics: Includes regulator and rectifier assembly for reliable voltage control (standard in modern alternators).
Technical Information
- Manufacturer: Valeo
- Model: CL18
- Product Codes: 9661544880, 9688085380, 5702K8, 5705AX, 5705EE, 5705JF, 5705E7, 5705NG, 5702F4, 5702G2
- Other Numbers: 180A
Typical Fitment Examples
Fits Citroën and Peugeot vehicles equipped with 2.0 and 2.2 HDi engines. Examples of commonly paired models include Citroën C4 and C5, and Peugeot 307 and 407. Always confirm the listed product codes against the vehicle’s existing alternator when selecting parts.
How Replacement Is Performed
Replacement requires basic mechanical skills and standard workshop tools. Typical procedure:
- Disconnect Negative Battery Terminal Before Any Work.
- Remove Engine Covers And Accessories That Obstruct Access.
- Release Drive Belt Tensioner And Remove Serpentine Belt From Alternator Pulley.
- Disconnect Electrical Connectors And Main Output Cable From The Alternator.
- Unbolt Mounting Brackets And Remove The Alternator.
- Install New Unit In Reverse Order, Ensure Correct Alignment And Tension Of Drive Belt.
- Reconnect Battery And Verify Charging System Voltage (Typical Target Range ~13.8–14.8 V With Engine Running).
Installation Recommendations
- Always Disconnect The Battery Before Starting Work To Prevent Short Circuits.
- Follow Manufacturer Torque Specifications For Mounting Bolts And Electrical Connections.
- Inspect And, If Necessary, Replace Drive Belt, Tensioner, And Idlers To Prevent Premature Failure.
- Ensure All Connectors Are Clean, Corrosion-Free And Fully Seated; Clean The Main Battery/Earth Connections.
- After Installation, Check Charging Voltage And Listen For Unusual Noises From The Pulley/Alternator Under Load.
Why This Part Most Commonly Fails
Alternators typically fail due to normal wear or secondary causes. Common failure modes for CL18 units include:
- Worn Brushes Or Slip-Ring Wear Leading To Poor Electrical Contact.
- Diode Rectifier Or Voltage Regulator Failure Causing Undercharge Or Overcharge.
- Bearing Wear Resulting In Noise Or Seizure—more likely on high-mileage vehicles.
- Freewheeling Pulley Failure Causing Rattling, Belt Wear Or Loss Of Smooth Deceleration Damping.
- Contamination From Oil Or Coolant Leaks And Excessive Heat From Electrical Overloads.
Signs Of A Failing Alternator
- Battery Warning Light Or Charging Fault On Instrument Cluster.
- Dimming Or Flickering Lights, Especially At Idle.
- Unusual Noises From The Alternator Area (Grinding, Whining, Rattling).
- Difficulty Starting Or Repeated Battery Discharge.
- Burning Smell Or Visible Belt Slip.
Notes For Professionals And Experienced DIYers
This alternator is suitable for workshop replacement and for competent DIY repairs. Because many customers search by OE number, the included product codes should help you find the correct unit quickly. If replacing an alternator in a vehicle with heavy accessory loads, verify that the 180A rating meets the system requirements.
