Intake Manifold Cleaning & Inspection - Upper

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Cleaning Upper Intake Manifold

Courtesy of GENERAL MOTORS CORP.

Clean the upper intake manifold mating surfaces.
Clean the upper intake manifold.
Inspect the upper intake manifold for damage.
Clean and inspect the PCV valve and components, replace as necessary.
Replace the upper intake manifold as necessary.