Intake Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Clean the intake manifold mating surfaces.
Inspect the intake manifold for damage.
Inspect the intake manifold for cracks near compression limiters.
Inspect the crankcase ventilation passages in the intake manifold face for blockage and clean as necessary.
Replace the intake manifold as necessary.

Fig 1: Intake Manifold & Bolts
Courtesy of GENERAL MOTORS CORP.