Why is my Vauxhall Movano's engine making a knocking sound?

I recently purchased a Vauxhall Movano and I've noticed that the engine has started to make a knocking sound. What could be causing this and should I be concerned?

It's possible that the knocking sound is coming from a loose or worn out belt in the engine. It's important to have it checked and replaced if necessary to avoid any further damage.

Another potential cause could be a lack of lubrication in the engine. Make sure to regularly check and change the oil to prevent any potential engine damage.

If the knocking sound is accompanied by a loss of power or strange smells, it could be a more serious issue with the engine. In this case, it's best to take your van to a qualified mechanic for a thorough inspection.