taping sound in the engine on 2001 BMW 740i

there is a taping sound in the engine,this is just a week now, i had my oil change and is still taping, what must be the problem? car have 145k miles please help me

Asked by for the 2001 BMW 740i
1 answer
suggest letting a qualified BMW technician look/listen to this engine noise. tapping of any kind is not normal.