GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 STS 🢒 Preface 🢒 Dangers, Warnings, and Cautions 🢒 Primary Camshaft Intermediate Drive Chain Tensioner Installation

Special Tools

    • EN-46105 Camshaft Locking Tool
    • EN-46112 Tensioner Retraction Pins
    • EN-48383 Camshaft Retaining Tools
    • EN-48589 Crankshaft Rotation Socket
    • J-45027 Tensioner Tool

For equivalent regional tools, refer to Special Tools.


    Object Number: 1306381 Size: SH
  1. Ensure that the primary camshaft drive chain tensioner (3) is being installed.

    2. Object Number: 1306417 Size: SH
  2. Using the J-45027 tool , reset the primary camshaft drive chain tensioner plunger.

    3. Object Number: 1306418 Size: SH
  3. Install the plunger into the primary camshaft drive chain tensioner body.

    4. Object Number: 1306420 Size: SH
  4. Compress the plunger into the body and lock the primary camshaft drive chain tensioner by inserting the EN-46112 pins into the access hole in the side of the primary camshaft drive chain tensioner body.
  5. Slowly release pressure on the primary camshaft drive chain tensioner. The primary camshaft drive chain tensioner should remain compressed.

    6. Object Number: 1306422 Size: SH
  6. Install a NEW primary camshaft drive chain tensioner gasket to the primary camshaft drive chain tensioner.
  7. Install the primary camshaft drive chain tensioner bolts through the primary camshaft drive chain tensioner and gasket.
  8. Ensure the primary camshaft drive chain tensioner mounting surface on the engine block does not have any burrs or defects that would degrade the sealing of the NEW primary camshaft drive chain tensioner gasket.

    9. Object Number: 1853226 Size: SH
  9. Place the primary camshaft drive chain tensioner into position and loosely install the bolts to the block.

    10. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1306423 Size: SH
  10. Verify the proper placement of the primary camshaft drive chain tensioner gasket tab (1).
    11. 10.1. First Pass

    Tighten the primary camshaft drive chain tensioner bolts to 5 N·m (44 lb in).

    10.2. Final Pass

    Tighten the primary camshaft drive chain tensioner bolts to 23 N·m (17 lb ft).


    Object Number: 1853233 Size: SH
  11. Release the primary camshaft drive chain tensioner by pulling out the EN-46112 pins and unlocking the tensioner plunger.

    12. Object Number: 1853237 Size: SH
  12. Verify the primary and left secondary camshaft drive chain timing mark alignments (1-12). Also refer to Camshaft Timing Drive Chain Alignment Diagram - Stage One.

    13. Object Number: 1306426 Size: SH
  13. Remove the EN 46105-1 from the rear of the left camshafts.

    14. Object Number: 1866953 Size: SH
  14. Using the EN-48589 socket , rotate the crankshaft and crankshaft sprocket from the stage 1 alignment position (1) to the stage 2 alignment position (2), 115 crankshaft degrees, in order to install the right secondary camshaft drive chain components.

    15. Object Number: 1306428 Size: SH
  15. Install the EN 46105-2 onto the rear of the left camshafts.

    16. Object Number: 946124 Size: SH
  16. Install the EN 48383-3 onto the rear of the right camshafts.