Intake Propblem?

[chr1s11575stang]

I went to start the car this morning and its making a loud knocking noise. It sounds like its coming from the upper intake? Is it possible for that too make the noise or is it more likely the something under the valve covers? Its all stock.

 

[87GT40]

double check your header bolts. it sounds like a exhaust leak. if the bolts are tight then check the gaskets. could have a bad gasket.