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Idle Air Control Valve: Installation

    NOTE: If installing a new IAC valve, be sure to replace the valve with an identical part. The pintle shape of the IAC valve and the diameter of the IAC valve are designed for the specific application.
  1. Measure the distance between the tip of the IAC valve pintle and the mounting surface. See Fig 1 . If the distance is more than 1.10" (28 mm), 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.
  2. Lubricate the IAC valve "O" ring with clean engine oil. Install the IAC valve "O" ring on the IAC valve. Install the IAC valve. Apply Thread Locking Compound (Loctite 262) to the IAC valve attaching screw threads. Install the IAC valve attaching screws and tighten to specification. See TORQUE SPECIFICATIONS  . Connect the IAC valve electrical connector.
Fig 1: Measuring IAC Valve Pintle Distance
G00112771Courtesy of GENERAL MOTORS CORP.
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