2003 Ford F350 - Exhaust Through HVAC

exhaust smell is comming out of the ac sometimes

I would drive with a window cracked straight to a muffler shop to have your exhaust system checked for leaks


here’s some possibilities . . .

cracked exhaust manifold(s)

leaking exhaust manifold flange gasket(s)

leaking exhaust manifold gasket(s)

exhaust manifold leaks due to broken exhaust manifold hardware