Description
Camshaft pulley for 1.4 HDI and 1.6 HDI engines.
This camshaft pulley (timing pulley) is designed for gasoline/diesel HDi engines in Citroën and Peugeot vehicles and is commonly sought under OE numbers 9640473280, 9657477580 and reference 0805H2. It secures the timing belt to the camshaft, maintaining correct valve timing and ensuring smooth engine breathing. Suitable for professional mechanics and DIY enthusiasts, this part is a direct-fit replacement for worn or damaged pulleys on many 1.4 HDi and 1.6 HDi applications. Searchable by product codes, the pulley helps restore precise camshaft timing and reduces the risk of belt slip or vibration after replacement.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: 1.4 HDi and 1.6 HDi Engines (e.g., Peugeot 206, 207, 307, 308, Partner; Citroën C3, C4, Berlingo)
- Product Codes: 9640473280, 9657477580, 0805H2
- Other Numbers: Common Reference Numbers Used In Parts Catalogues And Workshops
Function And Benefits
The camshaft pulley conveys rotary motion from the timing belt to the camshaft, keeping valve timing accurate. A correctly functioning pulley prevents belt misalignment, reduces wear on the timing belt and associated idlers, and contributes to stable engine performance, fuel efficiency and emissions control. Installing a new pulley eliminates wobble and bearing play that cause noise and potential timing errors.
Symptoms Of A Faulty Pulley
- Rattling or grinding noise from the front of the engine at idle or under load
- Visible play or wobble when the pulley is inspected
- Uneven engine running, misfires or loss of power
- Oil or debris contamination around the pulley area
- Premature timing belt wear or belt slippage
Common Causes Of Failure
Pulleys most often fail because of bearing wear, water or oil contamination, corrosion, or damage from a misaligned or over-tensioned timing belt. Heat and long service intervals accelerate bearing deterioration. Debris ingress or broken seals can quickly compromise the bearing, resulting in noise and eventual seizure.
Replacement Interval And Recommendations
Replace the camshaft pulley according to the vehicle manufacturer’s timing service schedule or whenever the timing belt is replaced. Many workshops recommend renewing pulleys, tensioners and idler rollers together with the timing belt to avoid repeated labor and to ensure system reliability. Typical service intervals for timing systems vary by model and driving conditions; consult the vehicle maintenance schedule for exact kilometer/time values.
Installation Recommendation
- Follow the vehicle manufacturer’s service manual for correct timing alignment and torque values.
- Work On A Cold Engine With The Battery Disconnected To Avoid Accidental Cranking.
- Mark Cam And Crankshaft Positions Before Removing The Timing Belt To Preserve Engine Timing.
- Inspect And Replace Tensioner, Idler Pulley And Timing Belt If Wear Or Play Is Detected.
- Use Correct Tools To Hold The Camshaft Stationary While Loosening Or Tightening The Pulley Bolt.
- After Installation, Rotate The Engine Manually Two Full Revolutions And Recheck Timing Marks And Belt Tension.
Why The Part Most Often Fails
The most frequent failure mode is bearing wear caused by age, contamination (oil/water) or excessive belt tension. Once the bearing degrades, the pulley develops play or noise and can lead to belt misalignment or failure. Preventive replacement during timing-belt service minimizes the risk of engine damage and unexpected breakdowns.
Keywords: Camshaft Pulley, Timing Pulley, Citroën, Peugeot, 1.4 HDI, 1.6 HDI, 9640473280, 9657477580, 0805H2.
