Intake Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.

Clean the upper intake manifold in cleaning solvent.
Dry the upper intake manifold with compressed air.

Fig 1: Cleaning and Inspecting Upper Intake Manifold
Courtesy of GENERAL MOTORS CORP.
Clean the lower intake manifold in cleaning solvent.
Dry the lower intake manifold with compressed air.

Fig 2: Cleaning and Inspecting Lower Intake Manifold
Courtesy of GENERAL MOTORS CORP.
Inspect the upper intake manifold for the following.
- Cracks or other damage to the exterior (1)
- Cracking or damage in the gasket grooves (2) and (3)
- Damage to the throttle body mounting surface (4)
- Loose or damaged bolt hole thread inserts (5)
  
  Fig 3: Inspecting Upper Intake Manifold
  Courtesy of GENERAL MOTORS CORP.
Inspect the lower intake manifold for the following:
- Damage to the gasket sealing surfaces (1) and (2)
- Restricted cooling system passages (3)
- Cracks or damage
- Damage to the threaded bolt holes
  
  Fig 4: Inspecting Lower Intake Manifold
  Courtesy of GENERAL MOTORS CORP.