rattle noise

[bubaru21]

ok so i keep hearing this rattling noise im almost sure its from the front end. and it only happens when i apply slightly on the accelerator and it only rattle for a short period of time. ive even had a subaru mechanic ride in the car and listen, and he didnt know what it was. i just had my wheel bearings checked and one replaced. i think it could be one of my differentials. i also hear a slight grinding type noise as well when coasting i have no clue what that could be. its not brake i checked them i was thinking that could be my cv axel. just hoping someone might know whats up.
thanks.
will

[Huffer]

Rattling noise - AC on or off?

Metal/metal = heatshield?

Plastic rattle, could be a loose trim or part of the undershield.

[bubaru21]

its there ac on or off. could be heat shield. engine was resealed this past year due to oil leak, and the tranny redone. so maybe jsut a loose something. so you think its nothing big and expensive to worry about though? thanks.

[Plays_with_Toys]

Does it happen when you engine brake (ie: let off the gas and let the engine drop down the rev range? Does it only happen at certain RPM's?

My guesses are either a heat shield on the y-pipe or exhaust, or one of the pieces to the intake.

[bubaru21]

nope nothing with brakes. i think you guys are right its def something exhaust.

[sansMYSTi]

I would say heat shields - same problem on my wifes Outback. Removed them and she was quiet again.