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Home >> Pontiac >> 2008 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 3.8L) >> Repair Instructions - On Vehicle >> Timing Chain and Sprocket Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Balance Shaft Driven Gear & Bolt
    GM97868Courtesy of GENERAL MOTORS CORP.
  1. Install the balance shaft driven gear, if required.
    2. NOTE: Refer to Fastener Notice .
  2. Prevent the balance shaft from rotating and install the balance shaft driven gear bolt.

    Tighten: 

    1. Tighten the balance shaft driven gear bolt to 22 N.m (16 lb ft).
    2. Use the J 45059  to rotate the bolt an additional 70 degrees.

    3. Fig 2: Camshaft Thrust Plate & Bolts
    GM190552Courtesy of GENERAL MOTORS CORP.
  3. Install the camshaft thrust plate, if required.
  4. Install the camshaft thrust plate bolts, if required.

    Tighten:  Tighten the bolts to 15 N.m (11 lb ft).

    5. Fig 3: Balance Shaft Drive Gear
    GM97869Courtesy of GENERAL MOTORS CORP.
  5. Install the balance shaft drive gear.
    6. Fig 4: Balance Shaft Drive Gear & Balance Shaft Driven Gear Timing Marks
    GM97752Courtesy of GENERAL MOTORS CORP.
  6. Align the timing marks on the balance shaft drive gear and the balance shaft driven gear.
    7. Fig 5: Camshaft Sprocket & Timing Chain
    GM153596Courtesy of GENERAL MOTORS CORP.
  7. Install the crankshaft sprocket.
  8. Install the timing chain and the camshaft sprocket.
    9. Fig 6: Aligning Timing Chain & Sprocket Timing Marks
    GM192708Courtesy of GENERAL MOTORS CORP.
  9. Assemble the timing chain on the sprockets with the timing marks as close together as possible.
    10. Fig 7: Camshaft Sprocket Bolt
    GM248088Courtesy of GENERAL MOTORS CORP.
  10. Install the camshaft sprocket bolt.

    Tighten: 

    1. Tighten the camshaft sprocket bolt to 100 N.m (74 lb ft).
    2. Use the J 36660-A  to rotate the bolt an additional 90 degrees. See Special Tools .

    11. Fig 8: Timing Chain Dampener & Bolt
    GM153593Courtesy of GENERAL MOTORS CORP.
  11. Install the timing chain dampener.
  12. Install the timing chain dampener bolt.

    Tighten:  Tighten the bolt to 22 N.m (16 lb ft).

    13. IMPORTANT: Rotate the engine two revolutions and check the timing marks. Ensure that the marks are aligned.
  13. Install the engine front cover. Refer to Engine Front Cover Replacement .
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