H3 2006

Crankshaft Front Seal

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Removal & Installation



3.5L & 3.7L Engines

Specific to:

Hummer H3 2006-2010

  1. Remove the crankshaft balancer.
    WARNING
    Do not damage the engine front cover or the crankshaft.

  2.  
  3. Pry out the crankshaft front oil seal using a suitable tool and discard the seal.
  4.  

To install:

Click image to see an enlarged view

Fig. Crankshaft front seal-3.5L & 3.7L engines

  1. Apply the engine oil to the outside diameter of the crankshaft front oil seal.
  2.  
  3. Use the J 45951 to install the NEW crankshaft front oil seal.
  4.  
  5. Remove the J 45951.
  6.  
  7. Install the crankshaft balancer.
  8.  

5.3L Engine

Specific to:

Hummer H3 2006-2010

  1. Remove the crankshaft balancer.
  2.  
  3. Remove the crankshaft front oil seal from the front cover.
  4.  

To install:

Click image to see an enlarged view

Fig. Crankshaft front seal-5.3L engine


NOTE
Do not lubricate the oil seal sealing surface.


NOTE
Do not reuse the crankshaft front oil seal.

  1. Lubricate the outer edge of the oil seal with clean engine oil.
  2.  
  3. Lubricate the front cover oil seal bore with clean engine oil.
  4.  
  5. Install the crankshaft front oil seal onto the J 41478 guide.
  6.  
  7. Install the J 41478 threaded rod (with nut, washer, guide, and oil seal into the end of the crankshaft.
  8.  
  9. Use the J 41478 in order to install the oil seal into the cover bore.
    1. Use a wrench and hold the hex on the installer bolt.
    2.  
    3. Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore.
    4.  
    5. Remove the J 41478.
    6.  
    7. Inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.
    8.  

  10.  
  11. Install the crankshaft balancer.
  12.  

 
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