GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2008 🢒 SRX 🢒 Engine 🢒 Engine Mechanical - 4.6L (LH2) 🢒 Primary Camshaft Drive Chain and Sprockets Replacement

Tools Required

J 39946 Crankshaft Socket

Removal Procedure
  1. Remove the oil pump. Refer to Oil Pump Replacement .

    2. Object Number: 517185 Size: SH
  2. Align the primary timing marks (1) using the J 39946 .
  3. Remove the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Right Side and Secondary Camshaft Drive Chain Replacement - Left Side .
  4. Remove the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement .

    5. Object Number: 928361 Size: SH
  5. Remove the oil outlet tube (4).

    6. Object Number: 928395 Size: SH
  6. Remove the primary camshaft drive chain guide bolts and guide.

    7. Object Number: 928389 Size: SH
  7. Remove the camshaft intermediate sprocket retaining bolt.

    8. Object Number: 928397 Size: SH
  8. Remove the following as an assembly:
    9. • The primary camshaft drive chain (3)
    • The crankshaft sprocket
    • The camshaft intermediate sprocket
  9. Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection .

Installation Procedure

    Object Number: 207540 Size: SH
  1. Align the timing marks (1) of the camshaft intermediate and crankshaft sprockets. The marks should be aligned vertically in the installed position.
  2. Install the primary camshaft drive chain on the drive sprockets.

    3. Object Number: 928397 Size: SH
  3. Use the J 39946 to rotate the crankshaft until the crankshaft keyway is approximately at the 1 o'clock position.
  4. Install the following as an assembly:
    5. • The primary camshaft drive chain (3)
    • The crankshaft sprocket
    • The camshaft intermediate sprocket

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 928389 Size: SH
  5. Install the camshaft intermediate sprocket retaining bolt.

    6. Tighten
    Tighten the camshaft intermediate sprocket retaining bolt to 60 N·m (44 lb ft).


    Object Number: 928395 Size: SH
  6. Install the primary drive chain guide.
  7. Install the primary drive chain guide bolts.

    8. Tighten
    Tighten the primary drive chain guide bolts to 25 N·m (18 lb ft).

  8. Install the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement .

    9. Object Number: 928361 Size: SH
  9. Install the oil outlet tube (4) and bolts.

    10. Tighten
    Tighten the oil outlet tube bolts to 10 N·m (89 lb in).

  10. Install the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Left Side and Secondary Camshaft Drive Chain Replacement - Right Side .
  11. Remove the pin from the primary timing chain tensioner release lever.

    12. Object Number: 517185 Size: SH
  12. Ensure the primary timing marks (1) are aligned vertically.
  13. Install the oil pump. Refer to Oil Pump Replacement .