GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Timing Chain Cover and Seal

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REMOVAL & INSTALLATION



4.5L and 4.9L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the serpentine belt.
  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Remove the right front tire. Remove the right front air deflector.
  8.  
  9. Loosen and reposition the heater bypass line.
  10.  
  11. Remove the crankshaft pulley-to-crankshaft pulley bolt. Attach a wheel puller to the crankshaft pulley. Using a pilot between the crankshaft and the center bolt, press the crankshaft pulley from the crankshaft. Remove the Woodruff® key from the crankshaft.
  12.  
  13. Using a small prybar, pry the oil seal from the timing case cover, and discard it.
  14.  

To install:

  1. Clean the oil seal mounting surface. Lubricate the new seal with engine oil.
  2.  
  3. Using a hammer and the oil seal installation tool, drive the new seal into the timing case cover until it seats.
  4.  
  5. Lubricate the bore of the hub and the inside diameter of the seal with EP lubricant to prevent seizure to the crankshaft and provide lubrication to the oil seal lip.
  6.  
  7. Position the damper onto the crankshaft, lining up the key slot in the hub with the key on the crankshaft.
  8.  
  9. Position the installer on end of the crankshaft. Position the thrust bearing with the inner race forward, then the washer. The installer nut is last. Install the damper on the crankshaft by tightening the installer nut.
  10.  
  11. The hub will bottom out on the crankshaft. Tighten the installer nut to 65 ft. lbs. (90 Nm) to ensure the balancer and timing gear are fully seated. Remove the installer and reinstall the bolt/washer into the crankshaft. Tighten to 65 ft. lbs. (90 Nm).
  12.  
  13. Install the heater bypass line.
  14.  
  15. Install the right front air deflector. Install the right front tire.
  16.  
  17. Install the serpentine belt.
  18.  
  19. Connect the negative battery cable.
  20.  



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Fig. Front cover oil seal removal-4.5L and 4.9L engines



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Fig. Front cover oil seal installation-4.5L and 4.9L engines

4.6L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the harmonic balancer as described below:
    1. Release tension from the accessory drive belt.
    2.  
    3. Raise and safely support the vehicle, remove the right front wheel.
    4.  
    5. Remove the splash shields from the wheelhouse and remove the brace between the oil pan and the transmission case.
    6.  
    7. Install the flywheel holder tool J 39411 or equivalent, and remove the balancer bolt.
    8.  
    9. Support the engine cradle and remove the 3 bolts from the right side of the cradle.
    10.  
    11. Disconnect the RSS sensor from the right lower control arm.
    12.  
    13. Lower the engine cradle enough for clearance of puller tool.
    14.  
    15. Install pilot tool J 39344-2 into the end of the crankshaft.
    16.  
    17. Remove the harmonic balancer using puller tool J 38416 or equivalent.
    18.  

  4.  
  5. Using a small prybar, pry the oil seal out of the bore. Use caution not to damage the bore. Discard the old oil seal.
  6.  

To install:

  1. Clean the oil seal mounting surface. Lubricate the new seal with engine oil.
  2.  
  3. Install the new seal to the front cover, using seal installer tool J 38818 and harmonic balancer installation tool J 39344, or equivalents.
  4.  
  5. Install the harmonic balancer as described below:
    1. Position the balancer to the crankshaft and using tool J 39344 or equivalent, install the balancer.
    2.  
    3. Clean the balancer bolt threads and apply oil to the threads. Tighten the balancer bolt to 105 ft. lbs. (145 Nm), plus 120 degrees.
    4.  
    5. Raise the engine cradle into place and install the 3 bolts. Tighten the 3 bolts to 75 ft. lbs. (100 Nm).
    6.  
    7. Reconnect the suspension position sensors to the lower control arms.
    8.  
    9. Remove the flywheel holder tool and install the oil pan-to-Trans brace. Tighten the 4 bolts to 35 ft. lbs. (50 Nm).
    10.  
    11. Install the wheelhouse splash shields and the right front wheel.
    12.  
    13. Lower the vehicle and install the accessory drive belt.
    14.  
    15. Remove any excess RTV that is squeezed out of the sealing area.
    16.  

  6.  
  7. Connect the negative battery cable.
  8.  



Click image to see an enlarged view

Fig. Front cover oil seal removal-4.6L Northstar engine



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Fig. Front cover oil seal installation-4.6L Northstar engine

 
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