Nissan Altima Engine Rattle

When Car Is On Lots Of Rattling Noise Is Coming From Under The Car. I Was Told It Is My Heat Shield. It Is Getting Louder And More...

I've Changed The Tensioner Pulley Assembly An It's Still Making The Sound... Haven't Changed The Belt But I've Been Told Even If I Do Change...

This Has Been Going On For Almost A Year Now. I Am Just About All Out Of Ideas. When My Car Is Warmed Up And Been Driving For Twenty Or More...