Why is my Vauxhall Vivaro engine making a loud knocking noise?

I've noticed that my Vauxhall Vivaro's engine has started making a loud knocking noise while accelerating. This just started happening recently, and I'm not sure what could be causing it. Any ideas on what could be going on?

There could be a few different reasons why your engine is making a knocking noise. One possibility is that your engine oil is low or dirty, which can cause metal parts to rub against each other and create a knocking sound. Another possibility is that your engine bearings are worn and need to be replaced. I would suggest checking your oil level and schedule an appointment with a mechanic to have your bearings checked.

I had a similar issue with my Vauxhall Vivaro, and it turned out to be a problem with the fuel injectors. Make sure to check the condition of your fuel injectors and have them cleaned or replaced if necessary. Also, check your spark plugs to ensure they are in good condition. A misfiring cylinder can also cause a knocking sound.

I would also recommend checking your timing belt. If it's worn or loose, it can cause the engine to make a knocking noise. Additionally, have your engine checked for any internal damage, such as a cracked or bent connecting rod. This can also create a knocking sound.