Intake Manifold Cleaning and Inspection - Lower (L36)

WARNING: This page is about a different car, the 2004 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Lower Intake Manifold (L36)

Courtesy of GENERAL MOTORS CORP.

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.