Why is my BMW 1 Series engine making strange noises on start-up?

I recently purchased a BMW 1 Series and have noticed that when I start the engine, it makes a strange noise. It goes away after a few minutes of driving, but it concerns me. Is this normal or is there a potential issue with my engine?

Hi Samantha, it's normal for some BMW 1 Series engines to make a slight noise on start-up. This is due to the hydraulic valve lifters compressing the engine oil before they operate properly. However, if the noise persists or becomes louder, it may indicate a problem with the valve lifters or other engine components. It's best to have it checked by a professional mechanic.

Hi Samantha, the noise may be caused by a loose or worn timing chain. I recommend having it inspected and potentially replaced if needed. Ignoring this issue can lead to further damage to your engine.