Intake Manifold Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.

Clean the intake manifold mating surfaces.

Fig 1: Intake Manifold And Sealing Surfaces
Courtesy of GENERAL MOTORS COMPANY
Inspect the intake manifold (2) for damage.
Inspect the intake manifold for cracks near metallic inserts.
Inspect the crankcase ventilation passages in the intake manifold face for blockage.
Clean the crankcase ventilation passages with compressed air if necessary. Use a maximum of 172 kPa (25 psi) of air pressure.
WARNING: Wear safety glasses in order to avoid eye damage.
Clean the throttle body sealing surface (1).
Clean the intake manifold to cylinder head sealing surface (3).
Replace the intake manifold as necessary.