Noise from engine on start up

[billyboy193]

Got a 325i that upon starting and driving hard (not thrashing it) there is a clattery sound, sounds like a tensioner on the chain or the chain rattling against something could it be anything else? but when you have driven it a few hundred metres it has gone and you don,t hear it anymore!

[koos]

As far as I know it doesnt have a chain, it has a cambelt. If it rattles at startup and goes away then it probably needs the valves adjusting. would benfit from a oil change aswell or in extreme cases there is low oil pressure and the oil takes a while to get to the top.probably tappetts though. check the oil level aswel.

[Treeman612]

2.5 engine uses cam belt, not chain. The only rattles you would hear from cam belt end would be if the tensioner has disintergrated - this would not go away, and would mean you are about to lose the cam belt (uh-oh!)
Has the cam belt been changed? - if you're not sure, my advice is get it changed ASAP, and replace the tensioner at the same time.

[billyboy193]

Oil pressure is ok and level is ok and just been serviced and has fsh but unsure when belt was last done may get it checked out just in case - cheers