Description
Timing camshaft gear for Citroën and Peugeot vehicles with 1.6 HDI and 1.6 eHDI engines.
This camshaft sprocket (timing gear) is designed for use on 1.6 HDi / 1.6 e-HDi engines in Citroën and Peugeot models and is often searched for by part numbers 9657477580 and 0805H2. It transfers rotation from the timing belt to the camshaft, keeping valve timing accurate for safe and efficient engine operation. The robust construction ensures reliable mesh with the timing belt and precise alignment of camshaft timing—critical for diesel engines with tight valve timing tolerances. Ideal for professional workshops and competent DIY mechanics performing timing system maintenance or repairs.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: 1.6 HDi, 1.6 e-HDi (DV6 family)
- Product Codes: 9657477580, 0805H2
- Other Numbers: 0805 H2
Compatibility And Typical Applications
Fits Citroën and Peugeot vehicles equipped with the 1.6 HDi / 1.6 e-HDi engines (DV6 engine family). Common applications include small and compact models such as Citroën C3, C4, C5, Berlingo and Peugeot 207, 307, 308, Partner, among others. Always verify the part number against the vehicle’s service data before installation.
Function And Fault Symptoms
The camshaft sprocket transmits torque from the timing belt to the camshaft, keeping intake and exhaust valves timed to piston movement. When the sprocket is worn, damaged or its teeth are compromised, symptoms may include irregular idling, loss of power, misfires, unusual noise from the timing cover area, difficulty starting, or a complete loss of synchronization causing the engine not to run. In severe cases, incorrect timing can lead to valve-to-piston contact on interference engines.
Installation Recommendations
- Perform installation in a clean, well-lit workspace with appropriate tools and safety equipment.
- Set engine to Top Dead Center (TDC) on cylinder 1 and align all timing marks on crankshaft and camshaft before removal.
- Release timing belt tensioner to remove belt, then replace the camshaft sprocket. Ensure the sprocket is installed with the correct orientation and timing marks aligned precisely.
- Use a new timing belt and tensioner when replacing the sprocket whenever possible; reusing an old belt increases the risk of premature failure.
- After assembly, rotate the engine by hand at least two full revolutions and re-check timing marks and belt tension to confirm correct installation.
- Follow vehicle manufacturer’s service procedures and torque specifications where applicable. Always disconnect the battery when performing major timing system work.
Why This Part Most Often Fails
Camshaft sprockets typically fail due to age-related wear, tooth damage from a snapped or slipping timing belt, contamination by oil or debris, corrosion on used parts, or improper installation (incorrect alignment or insufficient torque). Because the sprocket works together with the timing belt and tensioner, failure of any component in the timing system increases stress on the sprocket and shortens its service life. For this reason, replacing the sprocket as part of a complete timing kit is commonly recommended during major timing maintenance.
