When do you change the timing chain on a 57 plate Ford Mondeo 2.0 tdci?

The timing chain on a 57 plate Ford Mondeo 2.0 TDCi is designed to last the lifetime of the engine, so it typically does not require routine replacement like a timing belt. However, it should be inspected for wear or damage during regular servicing, especially if you notice any unusual engine noises or performance issues. If any signs of stretching or failure are detected, it’s advisable to replace the timing chain promptly to avoid serious engine damage. Always refer to the vehicle's service manual for specific recommendations.