what do i do? on 1996 Honda Accord

when i start my car it makes this real loud noise for a little bit and now it began to make the noise while im driving.i was told a couple times that a bolt or screw or something on the motor or engine needed to be tightened im not to sure

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2 answers
seek daig and est as this could get worse and cost more $
Bring it to a shop that can identify and fix it , before something bad happens(or worse than what it already is). Hard to advise on an unspecified noise online.