Astro Van 2WD V6-4.3L VIN W (2001)
5. Remove the IAC valve assembly.
6. Remove the O-ring.
CLEANING AND INSPECTION PROCEDURE
1. Clean the IAC valve O-ring sealing surface, the pintle valve seat, and the air passage.
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Use a carburetor cleaner and a parts cleaning brush in order to remove any carbon deposits. Follow the instructions on the container.
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Do not use a cleaner that contains methyl ethyl ketone. MEK is an extremely strong solvent and not necessary for this type of deposit.
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Shiny spots on the pintle or seat are normal and do not indicate misalignment or a bent pintle shaft.
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If the air passage has heavy deposits, remove the throttle body for a complete cleaning.
2. Inspect the IAC valve O-ring for cuts, cracks, or distortion. Replace the O-ring if damaged.
INSTALLATION PROCEDURE
IMPORTANT: If you are installing a new IAC valve, replace the valve with an identical part. The IAC valve pintle shape and diameter are designed
for the specific application.
1. Measure the distance between tip of the IAC valve pintle and the mounting flange.
If the distance is more than 1.10 in, use finger pressure in order to slowly retract the pintle. The force required to retract the pintle of a new valve
will not cause damage to the valve.
