Intake Manifold Cleaning and Inspection - Lower

WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Clean the lower intake manifold mating surfaces.
Clean the lower intake manifold.
Inspect the threaded holes for damage.
Inspect the lower intake manifold for damage or nicks in the mating surfaces.
Replace or repair the lower intake manifold as necessary.

Fig 1: Cleaning And Inspecting Intake Manifold
Courtesy of GENERAL MOTORS CORP.