GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN-6347 Bracket
    • EN-956-1 Handle / Extension

For equivalent regional tools, refer to Special Tools.

Removal Procedure

  1. Remove the timing belt. Refer to Timing Belt Replacement.

  2. Object Number: 2027171  Size: SH
  3. Install EN-6347 bracket and EN-956-1 handle  (2) to fix the camshaft drive sprocket (1).

  4. Object Number: 2027518  Size: SH
  5. Remove camshaft drive sprocket bolt (4).
  6. Remove camshaft drive sprocket bolt washer (3).
  7. Remove camshaft drive sprocket (1).

Installation Procedure


    Object Number: 2027518  Size: SH

    Note: Ensure that the camshaft surface (2) is free from grease and oil.

  1. Install the camshaft drive sprocket (1).
  2. Install the camshaft drive sprocket bolt (4) and the camshaft drive sprocket bolt washer (3)

  3. Object Number: 2027171  Size: SH
  4. Install EN-6347 bracket and EN-956-1 handle  (2) to fix the camshaft sprocket (1).
  5. Install and tension the timing belt. Refer to Timing Belt Installation.
  6. Caution: Refer to Fastener Caution in the Preface section.

  7. Tighten the camshaft drive sprocket bolt to  133 N·m (99 lb ft).
  8. Install timing belt assembly. Refer to Timing Belt Replacement.