GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Opel 🢒 2007 🢒 Antara 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Camshaft Timing Drive Components Cleaning and Inspection

Cleaning Procedure
  1. Clean all the following components with a suitable solvent:
    2. • Crankshaft sprocket
    • Primary timing chain
    • Primary timing chain guide
    • Primary timing chain tensioner
    • Secondary timing chains
    • Secondary timing chain shoes
    • Secondary timing chain guides
    • Secondary timing chain tensioners
    • Bolts
  2. Dry all the components with compressed air.

Timing Chains Inspection

    Object Number: 1796647 Size: SH
  1. Inspect the primary and/or secondary timing chains for the following:
    2. • Binding or worn rollers (1)
    • Loose links (2)
    • Loose pins (3)
  2. Replace a damaged timing chain as required.

Camshaft Intermediate Driveshaft Sprockets Inspection
Object Number: 1796653 Size: SH

Inspect the camshaft intermediate driveshaft sprockets for the following:

    • Damage to the primary and secondary timing chain sprocket (1).
    • Damage to the hub bearing (2). Ensure the hub bearing spins freely. If the hub bearing wobbles, is noisy or feels rough when rotated replace the camshaft intermediate sprocket.
    • Damage to the bolt flange seating / sealing surface (3).
    • Damage to the bearing hub-to-engine block sealing surface.
    • Inspect the camshaft position actuator assemblies.

Crankshaft Sprockets Inspection

    Object Number: 1796655 Size: SH
  1. Inspect the crankshaft sprocket for the following:
    2. • Sprocket damage (1)
    • Bore damage (2)
    • Keyway damage (3)
    • Damage to the cushion material (4)
  2. Replace a damaged sprocket as required.

Primary Timing Chain Upper Guide Inspection

    Object Number: 1796664 Size: SH
  1. Inspect the primary timing chain lower guide for the following:
    2. • Worn guide surface (1)
    • Cracked or broken guide surface (2)
    • Cracked or damaged guide base (3)
  2. Replace a damaged guide as required.

Primary Timing Chain Lower Guide Inspection

    Object Number: 1796680 Size: SH
  1. Inspect the primary timing chain lower guide for the following:
    2. • Worn guide surface (1)
    • Cracked or broken guide surface (2)
    • Cracked or damaged guide base (3)

    Important: The primary timing chain lower guide is not serviced separately and is part of the oil pump assembly.

  2. Replace the primary timing chain lower guide by replacing the oil pump assembly, if necessary. Refer to Oil Pump ReplacementOil Pump Replacement.

Primary Timing Chain Tensioner Inspection

    Object Number: 1796683 Size: SH
  1. Inspect the primary timing chain tensioner for worn shoe surface (1).
  2. Inspect the tensioner for a locked or binding tensioner shaft (2). Reset the plunger (3) and ensure the tensioner shaft moves freely in and out of the body of the tensioner

    3. Important: To reset the tensioner, use a suitably sized flat-bladed screwdriver (4) to wind the plunger in a clockwise direction, into the tensioner shaft.

  3. Replace a damaged tensioner as required.

Bank 2 Secondary Timing Chain Guide Inspection

    Object Number: 1796685 Size: SH
  1. Inspect the bank 2 secondary timing chain guide for the following:
    2. • Worn guide surface (1)
    • Cracked or broken guide surface (2)
    • Cracked or damaged guide  (3)
  2. Replace a damaged guide as required. Reset the plunger (3) and ensure the tensioner shaft moves freely in and out of the body of the tensioner.

Bank 2 Secondary Timing Chain Shoe Inspection

    Object Number: 1796687 Size: SH
  1. Inspect the front of the bank 2 secondary timing chain shoe for the following:
    2. • Worn shoe surface (1)
    • Cracked or broken shoe surface (2)
    • Cracked or damaged shoe (3)

    Object Number: 1796691 Size: SH
  2. Inspect the back of the shoe for a damaged, worn or missing timing chain tensioner contact pad (1).
  3. Replace a damaged shoe as required.

Bank 2 Secondary Timing Chain Tensioner Inspection

    Object Number: 1796692 Size: SH
  1. Inspect the bank 2 secondary timing chain tensioner for damaged plunger-to-shoe contact surface (1).
  2. Inspect the tensioner for locked or binding tensioner shaft (2). Reset the plunger (3) and ensure the tensioner shaft moves freely in and out of the body of the tensioner.

    3. Important: To reset the tensioner, use a suitably sized flat-bladed screwdriver (4) to wind the plunger in a clockwise direction, into the tensioner shaft.

  3. Replace a damaged tensioner as required.

Bank 1 Secondary Timing Chain Guide Inspection

    Object Number: 1796693 Size: SH
  1. Inspect the bank 1 secondary timing chain guide for the following:
    2. • Worn guide surface (1)
    • Cracked or broken guide surface (2)
    • Cracked or damaged guide base (3)
  2. Replace a damaged guide as required.

Bank 1 Secondary Timing Chain Shoe Inspection

    Object Number: 1796694 Size: SH
  1. Inspect the front of the bank 1 secondary timing chain shoe for the following:
    2. • Worn shoe surface (1)
    • Cracked or broken shoe surface (2)
    • Cracked or damaged shoe (3)

    Object Number: 1796695 Size: SH
  2. Inspect the back of the shoe for a damaged, worn or missing timing chain tensioner contact pad (1).
  3. Replace a damaged shoe as required.

Bank 1 Secondary Timing Chain Tensioner Inspection
  1. Inspect the bank 1 secondary timing chain tensioner for damaged plunger-to-shoe contact surface  (1).

    2. Important: To reset the tensioner, use a suitably sized flat-bladed screwdriver (4) to wind the plunger in a clockwise direction, into the tensioner shaft.

  2. Inspect the tensioner for a locked or binding tensioner shaft (2). Reset the plunger (3) and ensure the tensioner shaft moves freely in and out of the body of the tensioner.
  3. Replace a damaged tensioner as required.