My jeep when its first starts now lately sounds like a tappin noise but goes away after a few minutes.. My buddy says hes sure its a leak on the Exhaust manifold?

 

could be hydralic lifters or exhaust leak listen to which side of the engine its coming from the next time you start it

 

Well i have a 4.0I sound like its ner the manifold but hard to tell ... plus i been havein trouble with it keepina steady idle after i get on it heavily with the gas makin it belive it mite be that since i mite have a leak at the seal .?