I have a 318 with dual exhaust and the passenger side exhaust kind of makes a chattering noise near to the engine or there about, only thing i can think it to be is a loose bolt or several but I'm wondering if there's a torque spec i can check them for or if it could be something else? the exhaust is also rusty so i know its old but i cant afford to replace it at this time.

 

Might be the heat riser?

 

Yes, it is the heat riser in the passenger side exhaust manifold. It is normal.

 

IF the manifold does have a heat riser it could be it. But, the bolts going from the manifold to the head should just be good and tight man. no real need to torque