Removal Procedure
- Remove the IAC valve electrical connector.
- Remove the IAC valve attaching screws (1).
Notice: If the IAC valve has been in service: DO NOT push or pull on the IAC
valve pintle. The force required to move the pintle may damage
the threads on the worm drive. Also, DO NOT soak the IAC valve in any liquid
cleaner or solvent, as damage may result.
- Remove the IAC valve assembly (2).
| • | Clean IAC valve O-ring sealing surface, pintle valve seat, and
air passage. |
| • | The IAC valve may be cleaned, using GM cleaner 1052626 or GM X-66A.
Use a shop towel or parts cleaning brush to remove heavy deposits. |
| • | Shiny spots on the pintle or seat are normal, and do not indicate
misalignment or a bent pintle shaft. |
| • | Whenever air passage have heavy deposits, remove throttle body
for complete cleaning. |
| • | Inspect IAC valve O-ring for cuts, cracks, or distortion. Replace
if damaged. |
| • | Whenever installing a new IAC valve, be sure to replace it with
an identical part. IAC valve pintle shape and diameter are designed for the
specific application. |
Installation Procedure
- Lubricate IAC valve O-ring (3) with clean engine oil.
- Install the IAC valve assembly (2).
- Install the IAC valve attaching screws (1).
Tighten
Tighten the IAC valve attaching screws to 3.0 N·m (27 lb
in).
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the electrical connector.
- Install the reset IAC valve pintle position:
| 5.1. | Turn ignition switch to the ON position (engine OFF). |
| 5.2. | Turn ignition OFF for ten seconds. |
| 5.3. | Start engine and check for proper idle operation. |
