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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System & Fuel System - 4.3L - Introduction (2 Of 2)) >> Repair Instructions >> Idle Air Control Valve Replacement >> Cleaning and Inspection Procedure

Cleaning and Inspection Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Measuring Distance Between IAC Valve Pintle & Mounting Flange
    GM17065Courtesy of GENERAL MOTORS CORP.
  1. Clean the IAC valve O-ring sealing surface, the pintle valve seat, and the air passage.
    • Use a carburetor cleaner and a parts cleaning brush in order to remove any carbon deposits. Follow the instructions on the container.
    • Do not use a cleaner that contains methyl ethyl ketone (MEK). MEK is an extremely strong solvent and not necessary for this type of deposit.
    • Shiny spots on the pintle or seat are normal and do not indicate misalignment or a bent pintle shaft.
    • If the air passage has heavy deposits, remove the throttle body for a complete cleaning. Refer to Throttle Body Assembly Replacement .
  2. Inspect the IAC valve O-ring for cuts, cracks, or distortion. Replace the O-ring if damaged.
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