GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN-6623 Installer

For equivalent regional tools, refer to Special Tools.


    Object Number: 1944454  Size: SH
  1. Position the new seal ring.
  2. • Position the seal ring in such a way that the pulse pick-up bracket is over the corresponding cut-out on the cylinder block.

       Note: Do not press in the seal ring all the way.

    • Slide the seal ring over the crankshaft. Push, until the seal ring is flush and sits evenly in the cylinder block.
  3. Using the EN-6623 installer , install the seal ring (1).
  4. • Tighten the 3 bolts (2).
    • Press the seal ring all the way in.
    • Install the bolt (3).
  5. Remove the EN-6623 installer .
  6. Remove the 3 bolts.
  7. Caution: Refer to Fastener Caution in the Preface section.

  8. Install the crankshaft pulse pick-up to the pulse pick-up bracket and tighten the bolt to  5N·m (44 lb in).
  9. Place the encoder on the crankshaft.