engine noise!!

i have a 1997 528i and i have this problem that i cant really find out. everytime i drive my car and arrive at a place and i stop my engine makes a ticking sound? it is not miss fire and its not the ingectors making the sound...what can it be? thanks

valves my car makes a ticking noise all the time could never figure it out a few people on here and the dealer have told me that its normal.