DeVille, Eldorado, Seville 1999-2005

Valve Covers

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General Information




CAUTION
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF , unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

Removal & Installation



Left Side
  1. Disconnect the negative battery cable.
  2.  
  3. Partially drain the coolant from the radiator.
  4.  
  5. Disconnect the upper radiator hose at the water crossover
  6.  
  7. Disconnect the spark plug wires.
  8.  
  9. Remove the right side cooling fan.
  10.  
  11. Disconnect the battery cable at the generator.
  12.  
  13. Disconnect the cable harness clip at the cam cover. Place the cable out of the way.
  14.  
  15. Disconnect the PCV fresh air tube from the cam cover.
  16.  
  17. Remove the right and left torque struts.

    Click image to see an enlarged view

    Fig. Torque struts will require removal.

  18.  
  19. Disconnect the water pump drive belt.
  20.  
  21. Remove the EGR tube.
  22.  
  23. Remove the water pump pulley using tool J38825 or equivalent.

    Click image to see an enlarged view

    Fig. Use a proper tool to remove the water pump drive pulley.

  24.  
  25. Remove the camshaft seal retainer screws.
  26.  
  27. Remove the camshaft seal.
  28.  
  29. Remove the cam cover screws.
  30.  
  31. Remove the cam cover by moving the cam drive end of the cover up.
  32.  
  33. Pivot the entire cover around the water pump drive shaft.
  34.  
  35. Move the cover upward and pivoting such that the edge of the cover closely follows the left edge of the intake manifold cover.
    NOTE
    Discard the cover seal if there is any evidence of damage or if the seal comes out of the groove in the cover during removal. The spark plug seals may be reused if undamaged.

  36.  

To install:

  1. Install the spark plug and cam cover seals as required.
  2.  
  3. Insert the intake cam through the hole in the cam cover and using your fingers, guide the cam cover up over the edge of the cylinder head.
    NOTE
    Be careful to prevent the exposed section of the cam cover seal from being damaged by the edge of the cylinder head casting.

  4.  
  5. Work the cover into position by allowing the top edge of the cover to follow the left side edge of the intake manifold.
  6.  
  7. Install the cam cover screws and tighten to 89 inch lbs. (10 Nm).
  8.  
  9. Connect the battery cable clip to the front edge of the cam cover.
  10.  
  11. Connect the battery cable at the generator
  12.  
  13. Lubricate the seal lips.
  14.  
  15. Install the camshaft seal to the end of the intake cam.
  16.  
  17. Seal the screw threads with sealer GM P/N 1052080, or equivalent, and tighten the screws to 27 inch lbs. (3 Nm).
  18.  
  19. Install the water pump pulley using tool J38823 or equivalent.

    Click image to see an enlarged view

    Fig. Use of a proper tool will ensure correct water pump pulley installation.

  20.  
  21. Install the water pump drive belt.
  22.  
  23. Install the right and left torque struts.
  24.  
  25. Connect the PCV fresh air tube.
  26.  
  27. Install the RH fan.
  28.  
  29. Connect the spark plug wires.

    Click image to see an enlarged view

    Fig. Route the spark plug wires exactly as shown. If you do not route the wires as shown, a misfire or surge condition could occur.

  30.  
  31. Connect the upper radiator hose.
  32.  
  33. Fill the engine coolant.
  34.  
  35. Connect the negative battery cable.
  36.  

  1. Remove the fuel injector sight shield.
  2.  
  3. Partially drain the cooling system.
  4.  
  5. Remove the radiator inlet hose from the water housing crossover.
  6.  
  7. Disconnect the PCV fresh air tube from the camshaft cover.
  8.  
  9. Remove the ignition coil cassette/coil assembly.
  10.  
  11. Remove the 4 spark plug boots.
  12.  
  13. Disconnect the cable harness clips at the front of the camshaft cover and position the cable harness aside.
  14.  
  15. Remove the secondary AIR valve bracket nut closest to the center of the engine.
  16.  
  17. Pry outward slightly on the secondary AIR valve bracket in order to gain clearance to remove the water pump drive belt shield nut.
  18.  
  19. Remove the water pump drive belt shield fasteners.
  20.  
  21. Remove the water pump drive belt shield.
  22.  
  23. Disconnect the water pump drive belt.
  24.  
  25. Loosen the 2 bolts attaching the water pump belt tensioner to the water crossover.
  26.  
  27. Remove the water pump belt tensioner.
  28.  
  29. Remove the plastic dust cap from the end of the intake camshaft.
  30.  
  31. Remove the water pump drive pulley from the intake camshaft using tool J38825 or equivalent.

    Click image to see an enlarged view

    Fig. Use a proper tool to remove the water pump drive pulley.

  32.  
  33. Remove the 3 camshaft seal retainer bolts.
    NOTE
    DO NOT reuse the camshaft seal.

  34.  
  35. Remove the camshaft seal.
  36.  
  37. Remove the camshaft cover bolts.
  38.  
  39. Lift the camshaft drive end of the camshaft cover up.
  40.  
  41. Remove the camshaft cover reward to clear the water pump drive shaft.
    NOTE
    Discard the camshaft cover perimeter seals and spark plug seals if there is any evidence of damage or if the seal comes out of the groove in the cover during removal.

  42.  
  43. Clean and inspect the camshaft cover.
  44.  

To install:

  1. Install the camshaft cover seal as required.
    NOTE
    Be careful to prevent the exposed section of the camshaft cover seal from being damaged by the edge of the cylinder head casting.

  2.  
  3. Insert the intake camshaft end through the hole in the camshaft cover.
  4.  
  5. Work the camshaft cover into position by pivoting the cover down and to the left allowing the cover to clear the camshaft drive chain and then aligning the bolt holes.
  6.  
  7. Install the 9 camshaft cover bolts and tighten to 89 inch lbs. (10 Nm).
  8.  
  9. Install the NEW seal as follows:

    Lubricate the camshaft seal lips with engine oil.
     
    Push the camshaft seal into position around the intake camshaft using the protective sleeve supplied with the seal.
     

  10.  
  11. Coat the bolt threads with sealant GM P/N 1052080 (Canadian P/N 10953480) or equivalent.
  12.  
  13. Install the camshaft seal bolts and tighten to 27 inch lbs. (3 Nm).
  14.  
  15. Place the water pump drive pulley in position on the intake camshaft.
  16.  
  17. Install the water pump pulley using tool J38823 or equivalent. During installation, the tool will bottom out on the camshaft at the proper depth.
  18.  
  19. Install the plastic dust cap into the end of the camshaft.
  20.  
  21. Position the water pump belt tensioner to the water crossover and tighten tensioner bolts to 89 inch lbs. (10 Nm).
  22.  
  23. Connect the water pump drive belt.
  24.  
  25. Install the water pump drive belt shield.
  26.  
  27. Install the water pump drive belt shield fasteners and tighten fasteners to 89 inch lbs. (10 Nm).
  28.  
  29. Tighten the secondary AIR valve bracket nut to 80 inch lbs. (9 Nm).
  30.  
  31. Connect the cable harness clips to the cable harness at the front of the camshaft cover.
  32.  
  33. Install the spark plug boots onto the coil cassette. Ensure that the boots are fully seated against the cassette.
  34.  
  35. Install the ignition coil cassette/coil assembly.
  36.  
  37. Connect the PCV fresh air tube to the left camshaft cover. connect the radiator inlet hose to the water housing crossover.
  38.  
  39. Install the fuel injector sight shield.
  40.  
  41. Fill the cooling system and check for leaks.
  42.  

Right Side
  1. Disconnect the negative battery cable.
  2.  
  3. Raise the vehicle.
  4.  
  5. Disconnect the exhaust manifold rear pipe at the converter. Position the converter out of the way.
  6.  
  7. Lower the vehicle.
  8.  
  9. Remove the tower-to-tower brace.
  10.  
  11. Disconnect the four DIS (Direct Ignition System) wiring connectors and four mounting bolts.
  12.  
  13. Remove the DIS and right bank spark plug wires.
  14.  
  15. Disconnect the PCV Valve.
  16.  
  17. Remove the purge canister solenoid from the rear of the cover.
  18.  
  19. Remove the three screws securing the wiring harness to the cover.
  20.  
  21. Remove the cam cover screws.
  22.  
  23. Support the front of the engine cradle.
  24.  
  25. Remove the two mounting screws at the front of the cradle.
  26.  
  27. Remove the right and left torque nuts.
  28.  
  29. Lower the engine cradle for (or raise the vehicle) to provide clearance at the rear of the engine compartment.
  30.  
  31. Remove the camshaft cover.
    NOTE
    Discard the cover seal if it is damaged or if it was pulled from the groove in the cover during removal. Spark plug seals may be reused if undamaged.

  32.  

To install:

  1. Install the spark plug and cam cover seals as required.
  2.  
  3. Install the camshaft cover.
  4.  
  5. Install the cover screws and tighten to 89 inch lbs. (10 Nm).
  6.  
  7. Raise the engine cradle into position and install two mounting bolts.
  8.  
  9. Tighten the bolts to 74 ft. lbs. (100 Nm).
  10.  
  11. Install the right and left torque struts. Adjust to provide zero preload.

    Click image to see an enlarged view

    Fig. Torque struts

  12.  
  13. Secure the wiring harness to the cam cover with three screws.
  14.  
  15. Secure the purge canister solenoid with one screw.
  16.  
  17. Connect the PCV valve.
  18.  
  19. Install the spark plug wires and secure the DIS to the cam cover with four screws.

    Click image to see an enlarged view

    Fig. Route the spark plug wires exactly as shown. If you do not route the wires as shown, a misfire or surge condition could occur.

  20.  
  21. Connect the DIS electrical connectors.
  22.  
  23. Install the tower-to-tower brace.
  24.  
  25. Raise the vehicle.
  26.  
  27. Connect the Exhaust Manifold Rear Pipe to the catalytic converter with two bolts and tighten to 18 ft. lbs. (25 Nm).
  28.  
  29. Connect the negative battery cable.
  30.  

  1. Remove the sight shield from the engine.
  2.  
  3. Disconnect the PCV dirty air tube from the camshaft cover.
  4.  
  5. Disconnect the oxygen sensor wire.
  6.  
  7. Disconnect the vacuum tubes from the secondary AIR vent solenoid.
  8.  
  9. Disconnect the secondary AIR vent solenoid electrical connector.
  10.  
  11. Remove the secondary AIR control valve bracket.
  12.  
  13. Remove the nut securing the secondary AIR tube.
  14.  
  15. Remove the ignition coil cassette/coil assembly.
  16.  
  17. Remove the 4 spark plug boots.
  18.  
  19. Disconnect the cable harness clips at the front of the camshaft cover and position the cable harness aside.
  20.  
  21. Remove the 9 camshaft cover bolts.
  22.  
  23. Remove the camshaft cover.
    NOTE
    Discard the camshaft cover perimeter seals and spark plug seals if there is any evidence of damage or if the seal comes out of the groove in the cover during removal.

  24.  
  25. Clean and inspect the camshaft cover.
  26.  

To install:

  1. Install the camshaft cover seal as required.
    NOTE
    Be careful to prevent the exposed section of the camshaft cover seal from being damaged by the edge of the cylinder head casting.

  2.  
  3. Install the camshaft cover.
  4.  
  5. Install the 9 camshaft cover bolts and tighten to 89 inch lbs. (10 Nm)..
  6.  
  7. Install the spark plug boots onto the coil cassette. Ensure that the boots are fully seated against the cassette.
  8.  
  9. Install the ignition coil cassette/coil assembly.
  10.  
  11. Install the secondary AIR control valve bracket.
  12.  
  13. Connect the cable harness clips to the cable harness at the front of the camshaft cover.
  14.  
  15. Connect the secondary AIR vent solenoid electrical connector.
  16.  
  17. Connect the vacuum tubes to the secondary AIR vent solenoid.
  18.  
  19. Connect the oxygen sensor wire.
  20.  
  21. Connect the PCV dirty air tube to the camshaft cover.
  22.  
  23. Position the intake manifold sight shield to the engine.
  24.  
  25. Install the 2 intake manifold sight shield nuts and tighten to 27 inch lbs. (3 Nm).
  26.  

 
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