Avalanche, Sierra, Silverado, C&K Series, 1999-2005

Crankshaft Front Seal

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Removal & Installation



Refer to the Timing Chain Cover and Seal procedure for gasoline engines or the Timing Gears Cover and Seal for diesel engines.

Refer to the Timing Chain Cover and Seal procedure for gasoline engines or the Timing Gears Cover and Seal for diesel engines.

6.5L Engine

NOTE
The front cover does not have to be removed for seal replacement.

  1. Disconnect both the battery negative cables from the batteries.
  2.  
  3. Remove the upper fan shroud from the radiator.
  4.  
  5. Remove the drive belt from the drive pulleys.
  6.  
  7. Raise the vehicle and support with safety stands.
  8.  
  9. Remove the lower radiator shrouds from the radiators.
  10.  
  11. Remove the crankshaft balancer from the crankshaft.
  12.  
  13. Remove the crankshaft front cover oil seal from the engine front cover by carefully prying it out, without nicking the crankshaft.
  14.  

To install:

  1. Use a seal driver to install a new crankshaft front cover oil seal.
  2.  
  3. Install the crankshaft balancer to the crankshaft.
  4.  
  5. Install the lower radiator shrouds to the radiator.
  6.  
  7. Remove the safety stands and lower the vehicle.
  8.  
  9. Install the drive belt on the drive pulleys.
  10.  
  11. Install the upper fan shroud to the radiator.
  12.  
  13. Connect both the battery negative cables to the batteries.
  14.  

 
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