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Centering Sir Coil Assembly

WARNING: This page is about a different car, the 1991 Geo Storm, 1991 Geo Metro, 1990 Geo Storm, and 1990 Geo Metro. However, it is still accessible from the selected car via links, so may be relevant.
  1. If coil assembly has been removed from steering column and is being reinstalled, go to step 2). New coil assemblies are supplied pre-centered.
  2. Ensure front wheels face straight-ahead when installing or removing a coil assembly. If coil is removed without wheels in straight-ahead position and steering wheel has not been moved, same coil can be reinstalled if coil hub also has not been rotated.
  3. Check face of SIR coil. If NEUTRAL mark is at alignment mark, coil is centered and no adjustment is necessary. See Fig 1 .
    Fig 1: Installing SIR Coil Assembly
    G91I12797Courtesy of GENERAL MOTORS CORP.
  4. If R1 mark is close to alignment mark, coil is one rotation off to right from its center state and needs to be adjusted one turn counterclockwise. R2 mark indicates coil is 2 rotations off, R3 is 3 rotations off, etc.
  5. If L1 mark is close to alignment mark, coil is one rotation off to left from its center state and needs to be adjusted one turn clockwise. L2 mark means coil is 2 rotations off, etc.
  6. To adjust SIR coil, hold coil lead at its base and turn it in direction of arrow on coil housing.
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