okay, whenever i am in park (auto) and i rev it alittle and let go, there is this squeaking noise from the engine. it almost always happens when i turn off the car. it's like....squeeeeakk squeeeeak squeak squeak. someone told me it was the powersteer but when i listen to it, it sounds like it's coming from in back of the heat sheild (for the exhaust manifold). can some one help me? could it be like a small crakc or some sort? thanks

 

please help~!

 

anyone?