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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Mechanical - 3.9L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Chain and Sprockets Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Camshaft & Actuator Filter
    GM1608915Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Always install a NEW camshaft position actuator filter anytime the camshaft position actuator is removed.
  1. Install s NEW camshaft position actuator filter (1) to the end of the camshaft.
    2. Fig 2: View Of Crankshaft Sprocket
    GM760405Courtesy of GENERAL MOTORS CORP.
  2. Install the crankshaft sprocket.
  3. Apply prelube GM P/N 12345501 (Canadian P/N 992704) or equivalent to the crankshaft sprocket thrust surface.
    4. Fig 3: View Of Timing Chain Tensioner & Bolts
    GM1557846Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  4. Install the timing chain tensioner.
  5. Install the timing chain tensioner bolts.

    Tighten:  Tighten the bolts 21 N.m (15 lb ft).

    6. Fig 4: Collapsing Tensioner
    GM1557847Courtesy of GENERAL MOTORS CORP.
  6. Using the EN-47719  , fully collapse the tensioner and place the tensioner retaining pin into the retaining hole (1). See Special Tools .
    7. Fig 5: Identifying Timing Marks & Chain Tensioners
    GM1557849Courtesy of GENERAL MOTORS CORP.
  7. Align the crankshaft timing mark (1) to the timing mark on the bottom of the timing chain tensioner (2).
  8. Hold the camshaft sprocket with the timing chain hanging down and install the timing chain to the crankshaft gear.
  9. Align the timing mark on the camshaft gear (3) with the timing mark on top of the timing chain tensioner (4).
    10. Fig 6: View Of Timing Chain & Sprockets
    GM1557703Courtesy of GENERAL MOTORS CORP.
  10. Align the dowel in the camshaft sprocket with the dowel hole in the camshaft.
  11. Draw the camshaft sprocket onto the camshaft using the mounting bolts.

    Tighten:  Tighten the bolts 16 N.m (12 lb ft).

  12. Remove the retaining pin from the timing chain tensioner in order to make the tensioner active.
  13. Coat the crankshaft and camshaft sprockets with clean engine oil.
  14. Install the engine front cover. Refer to Engine Front Cover Replacement .
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