Montana, Silhouette, Venture 2000-2005

Timing Chain & Sprockets

Print

Removal & Installation



3.5L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the timing chain cover. For additional information, refer to the following section, -Timing Chain Cover and Seal, Removal & Installation.-
  4.  
  5. Rotate the crankshaft until the timing marks are aligned.

    Click image to see an enlarged view

    Fig. Align the timing chain dampener (1) to the crankshaft sprocket (2) and the camshaft alignment pin (4) to the timing mark before removing-3.5L engine

  6.  
  7. Remove the camshaft sprocket bolt.
  8.  
  9. Remove the camshaft sprocket with the timing chain.

    Click image to see an enlarged view

    Fig. Removing camshaft sprocket and timing chain

  10.  
  11. Remove the crankshaft sprocket.
  12.  
  13. Remove the timing chain dampener bolts and timing chain dampener.
  14.  
  15. If necessary, remove the camshaft thrust plate.
  16.  

To install:

  1. Clean and inspect the timing chain and gears.
  2.  
  3. If removed, install the camshaft thrust plate and tighten the bolts to 89 inch lbs. (10 Nm).
  4.  
  5. Install the crankshaft sprocket. Apply engine oil supplement (EOS) to the sprocket thrust surface.
  6.  
  7. Install the timing chain dampener and tighten to the bolts to 15 ft. lbs. (21 Nm).
  8.  
  9. Install the timing chain onto the camshaft gear. Hold the camshaft sprocket with the chain hanging down, and install the chain to the crankshaft gear.
  10.  
  11. Align the crankshaft timing mark (2) to the timing mark on the bottom of the timing chain dampener (1).
  12.  
  13. Align the timing mark on the camshaft gear, center line of the locator hole (4), with the timing mark on the top of the chain dampener (3).
  14.  
  15. Align the dowel in the camshaft with the dowel hole in the camshaft sprocket (1).
  16.  
  17. Install the camshaft sprocket bolt and tighten to 103 ft. lbs. (140 Nm).
  18.  
  19. Coat the crankshaft and camshaft sprocket with clean engine oil.
  20.  
  21. Install the timing chain cover.
  22.  
  23. Start the engine and check for leaks.
  24.  

3.9L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the timing chain cover. For additional information, refer to the following section, -Timing Chain Cover and Seal, Removal & Installation.-

    Click image to see an enlarged view

    Fig. Align the timing marks before removing the timing chain-3.9L engine

  4.  
  5. Align the crankshaft timing mark (1) to the timing mark on the bottom of the timing chain tensioner (2).
  6.  
  7. Align the timing mark on the camshaft gear (3) with the timing mark on top of the timing chain tensioner (4).
  8.  
  9. Remove the camshaft sprocket bolts.
  10.  
  11. Remove the timing chain, camshaft sprocket and crankshaft sprocket.
  12.  
  13. Remove the timing chain tensioner.
  14.  

To install:

  1. Clean and inspect the timing chain and gears.
  2.  
  3. Install the crankshaft sprocket. Apply engine oil supplement (EOS) to the sprocket thrust surface.
  4.  
  5. Install the timing chain tensioner and tighten the bolts to 15 ft. lbs. (21 Nm).
  6.  
  7. Using Special Tool EN-47719, fully collapse the tensioner, and place the tensioner retaining pin into the retaining hole.

    Click image to see an enlarged view

    Fig. Use the Special Tool to collapse the tensioner and place the retaining pin into the retaining hole (1)-3.9L engine

  8.  
  9. Align the crankshaft timing mark (1) to the timing mark on the bottom of the timing chain tensioner (2).
  10.  
  11. Hold the camshaft sprocket with the timing chain hanging down and install the timing chain to the crankshaft gear.
  12.  
  13. Align the timing mark on the camshaft gear (3) with the timing mark on top of the timing chain tensioner (4).
  14.  
  15. Align the down in the camshaft sprocket with the dowel hole in the camshaft.
  16.  
  17. Draw the camshaft sprocket onto the camshaft using the mounting bots. Tighten bolts to 12 ft. lbs. (16 Nm).
  18.  
  19. Remove the retaining pin from the timing chain tensioner in order to make the tensioner active.
  20.  
  21. Coat the crankshaft and camshaft sprockets with clean engine oil.
  22.  
  23. Install the timing chain cover.
  24.  
  25. Start the engine and check for leaks.
  26.  

 
label.common.footer.alt.autozoneLogo