what are some possible reasons why there is a 2 second clicking and rattlingor sometimes a loud hum noise (one or the other)when a car stops and accelerates again? The noise goes away after 2 seconds until the car stops at a light and accelerates again. The motor mounts were recently changed because of the erratic vibration of the car. Brought it to 3 different mechanics and they all don't know why. It appeared after changing the motor mounts (professionally). Please take a look and listen to this video I recorded
for a better idea of what the sound is like (sometimes theres a hum like in the video, and sometimes more of a clicking rattle (not in the video) ) Also when the car is on but on park, the fan and engine is a lot louder than before.
thanks
http://s20.photobucket.com/albums/b2...t=MOV02663.flv

 

in the video it sounded like you have a exhaust leak but was the clicking noise in the last seconds of the video??

 

i dont think that was the clicking... probably movement or something else, the clicking isnt that loud, its more rattling. But the first few seconds is what I was trying to prove.
what part of the exhaust would i look at ?