You have not given us enough information. What make, year and model vehicle is it? What engine size and type ( 2.0, 2.5, 3.0, diesel, gas, V8, V6, I4, I6, I5, I3)?
Does the noise come and go? Only immediately after starting? Out of the exhaust? Under the hood only? The entire time it is running? Does it buzz or rattle, clank or clatter?
Click, clack, or grumble? Try to describe the noise in as much detail as possible.
Could be a cat in the fan belt
why does my starter make a loud screeching noise when i start it?
Starter relay is broken
Muffler loud noises
A loud fast clicking noise is usually indicative of a low battery or a loose cable.
You need to wash it.
Get bin Laiden
Sounds like a loose or worn belt
cars tend too
Could be a wheel bearing/hub going bad.
most likely a loose or worn belt.
it doesn't.More accurate answerThe engine will very quickly: Start rattlingStart a loud knockingIt may make a loud squeak noise and stopIt may make a loud bang noise and stop
It depends on the nature of the noise.