Montana SV6 (2006), Relay, Terraza, Uplander (2005-2007)

Camshaft, Bearings & Lifters

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Bearing Replacement



  1. Select the expander assembly and driving washer.
  2.  
  3. Assemble the Camshaft Bearing Remover set J-33049
  4.  
  5. Drive out the camshaft bearings.
  6.  
  7. Install the camshaft bearings in the following order:
    1. Index the camshaft bearing oil holes with the engine block oil passages.
    2.  
    3. Place the bearing on the J-33049.
    4.  
    5. Install the third camshaft bearing.
    6.  
    7. Install the second camshaft bearing.
    8.  
    9. Install the outer camshaft bearings.
    10.  

  8.  

Inspection



  1. Clean the camshaft with cleaning solvent.
  2.  
  3. Inspect the camshaft for scored bearing journals, damaged lobes or damaged position sensor reluctor areas.
  4.  
  5. Measure the camshaft journals using a micrometer. If the camshaft journals are not within: 1.868-1.869 in (47.443-47.468mm) for the 3.5L engine or 2.024-2.025 in (51.415-51.440mm), replace the camshaft.
  6.  
  7. Measure the camshaft runout. If runout exceeds 0.001 in (0.025mm), replace the camshaft.
  8.  
  9. Measure the camshaft lobe lift using a dial indicator. Lubricate the camshaft and set the camshaft on V-blocks. If lobe lift exceeds 0.2727 in (6.9263mm), replace the camshaft.
  10.  

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Properly relieve the fuel system pressure.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Drain the engine cooling system and the engine oil.
  8.  
  9. Remove the intake manifold. For additional information, refer to the following section, -Intake Manifold, Removal & Installation.-
  10.  
  11. Remove the rocker arms and pushrods. For additional information, refer to the following section, -Rocker Arms, Removal & Installation.-
  12.  
  13. Remove the timing chain cover. For additional information, refer to the following section, -Timing Chain Cover and Seal, Removal & Installation.-
  14.  
  15. Remove the timing chain. For additional information, refer to the following section, -Timing Chain, Removal & Installation.-
  16.  
  17. Remove the camshaft position sensor.

    Click image to see an enlarged view

    Fig. Remove the camshaft position sensor

  18.  
  19. Remove the camshaft thrust plate.

    Click image to see an enlarged view

    Fig. Remove the camshaft thrust plate.

  20.  
  21. Install the camshaft sprocket bolt into the camshaft. Tighten the bolt finger tight.
  22.  
  23. Carefully rotate and remove the camshaft from the engine block.
  24.  

To install:

  1. Coat the camshaft journals with clean engine oil.
  2.  
  3. Coat the camshaft lobes with pre-lube.
  4.  
  5. With the sprocket bolt still installed finger tight, carefully rotate the camshaft while installing the camshaft into the camshaft bearings.

    Click image to see an enlarged view

    Fig. Showing camshaft mounting in block

  6.  
  7. Install the camshaft thrust plate and tighten the bolts to 89 inch lbs. (10 Nm).
  8.  
  9. Install the camshaft position sensor and tighten the bolt to 89 inch lbs. (10 Nm).
  10.  
  11. The remainder of the installation is the reverse order of removal.
  12.  
  13. Refill the cooling system to the correct level.
  14.  
  15. Refill the engine with oil to the correct level.
  16.  
  17. Start the engine and check for leaks.
  18.  

 
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