Buick Regal 1997-2000

Valve Covers

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Removal & Installation



3.1L Engine
Left Side (Front)
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine coolant into a suitable container for reuse, if the coolant is not contaminated.
  4.  
  5. Tag for identification and remove the left side (front) spark plug wires.
  6.  
  7. Remove the automatic transaxle vacuum modulator pipe.
  8.  
  9. Remove the right engine mount strut through bolt at the engine side and then swing the strut forward out of the way.
  10.  
  11. Remove the PCV valve from the rocker arm cover by pulling the valve from its rubber grommet.
  12.  
  13. Remove the thermostat bypass pipe.
  14.  
  15. Remove the valve cover bolts and remove the cover from the engine. Do not pry it off. Bump the cover sideways with a rubber mallet if it is stuck. Discard the gasket.
  16.  

To install:



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Fig. Remove the PCV (crankcase vent tube) from the rubber grommet



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Fig. Unfasten the torque strut through bolt . . .



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Fig. . . . and swing the torque strut up out of the way



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Fig. Remove the spark plug wire guide, if necessary



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Fig. Unfasten the rocker arm (valve) cover retaining bolts . . .



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Fig. . . . then remove the cover from the cylinder head. Do not pry on the cover during removal



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Fig. Remove and discard the cover gasket

  1. Clean all parts well including the sealing surfaces on both the cylinder head and the cover gasket flange.
  2.  
  3. Install a new gasket. Apply sealant, GM #12345739, or equivalent, at the cylinder head to lower intake manifold joint.
  4.  
  5. Install the rocker arm cover and hand tighten the cover bolts. Torque to 89 inch lbs. (10 Nm).
  6.  
  7. Install the remaining components in the reverse order of the removal process.
  8.  
  9. Refill the cooling system and check the engine oil level. Add as necessary.
  10.  
  11. Connect the negative battery cable. Start the engine and verify no coolant or oil leaks.
  12.  

Right Side (Rear)
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the accessory drive belt. Please see Section 1.
  4.  
  5. Remove the alternator and brackets. Please see Section 2.
  6.  
  7. Remove the rear spark plug wires.
  8.  
  9. Remove the ignition coil bracket with the coils, the purge solenoid and the vacuum canister solenoid.
  10.  
  11. Remove the vacuum hose from the air duct at the rear cylinder head cover.
  12.  
  13. Remove the rocker arm cover bolts and remove the cover from the engine. Do not pry it off. Bump the cover sideways with a rubber mallet if it is stuck. Discard the gasket.
  14.  

To install:

  1. Clean all parts well including the sealing surfaces on both the cylinder head and the cover gasket flange.
  2.  
  3. Install a new gasket. Apply sealant, GM #12345739, or equivalent, at the cylinder head to lower intake manifold joint.
  4.  
  5. Install the rocker arm cover and hand tighten the cover bolts. Torque to 89 inch lbs. (10 Nm).
  6.  
  7. Install the remaining components in the reverse order of the removal process.
  8.  

3.4L Engine
VIN E Engine
Left Side (Front)


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Fig. Left side (front) rocker arm cover and sealant locations-3.4L (VIN E) engine

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine coolant.
  4.  
  5. Tag for identification and remove the left (front) spark plug wires. Please see Section 1.
  6.  
  7. Remove the AIR check valve/pipe.
  8.  
  9. Remove the thermostat bypass hose and pipe.
  10.  
  11. Remove the PCV valve from the rubber grommet in the rocker arm cover.
  12.  
  13. Remove the rocker arm cover bolts and remove the cover from the engine. Do not pry it off. Bump the cover sideways with a rubber mallet if it is stuck. Discard the gasket.
  14.  

To install:

  1. Clean all parts well including the sealing surfaces on both the cylinder head and the cover gasket flange. Install a new cover gasket. Apply sealant GM #12345739 or equivalent at the cylinder head to lower intake manifold joint at both ends of the lower intake manifold.
  2.  
  3. Install the rocker arm cover and install the cover bolts. Torque to 89 inch lbs. (10 Nm).
  4.  
  5. Install the remaining components in the reverse order of the removal process.
  6.  
  7. Refill the cooling system.
  8.  

Right Side (Rear)
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the accessory drive belt. Please see Section 1.
  4.  
  5. Remove the alternator and the alternator brackets. Please see Section 2.
  6.  
  7. Tag for identification and remove the right side spark plug wires.
  8.  
  9. Tag for identification and remove the vacuum hoses from the evaporative canister purge solenoid valve.
  10.  
  11. Remove the evaporative canister purge solenoid valve and the AIR check valve/pipe.
  12.  
  13. Remove the ignition coil bracket with the coils in place.
  14.  
  15. Remove the vacuum hose from the grommet in the right rocker arm cover.
  16.  
  17. Remove the rocker arm cover bolts and remove the cover from the engine. Do not pry it off. Bump the cover sideways with a rubber mallet if it is stuck. Discard the gasket.
  18.  

To install:

  1. Clean all parts well including the sealing surfaces on both the cylinder head and the cover gasket flange. Install a new cover gasket. Apply sealant GM #12345739 or equivalent at the cylinder head to lower intake manifold joint at both ends of the lower intake manifold.
  2.  
  3. Install the rocker arm cover and install the cover bolts. Torque to 89 inch lbs. (10 Nm).
  4.  
  5. Install the remaining components in the reverse order of the removal process.
  6.  

3.8L Engine
Left Side (Front)


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Fig. Rocker arm (valve) cover mounting -3.8L engines

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine lift bracket from the exhaust manifold studs.
  4.  
  5. Remove the acoustic/cosmetic engine cover.
  6.  
  7. Remove the right side "wish bone" shaped engine strut by removing the through bolts.
  8.  
  9. Tag for identification and remove the left (front) spark plug wires. Please see Section 1.
  10.  
  11. Remove the spark plug wire cover retainer clip from the rocker arm cover.
  12.  
  13. Remove the rocker arm cover bolts and remove the cover from the engine. Do not pry it off. Bump the cover sideways with a rubber mallet if it is stuck. Discard the gasket.
  14.  

To install:

  1. Clean all parts well including the sealing surfaces on both the cylinder head and the cover gasket flange. Clean any thread-locking compound from the rocker arm cover bolts.
  2.  
  3. Install a new gasket making sure the gasket is properly seated in the cover groove. Install the cover. Apply thread-locking compound GM #12345493 or equivalent to the bolt threads and install the cover bolts. Torque to 89 inch lbs. (10 Nm).
  4.  
  5. Install the remaining components in the reverse order of the removal process.
  6.  

Right Side (Rear)
  1. Disconnect the negative battery cable
  2.  
  3. Remove the acoustic/cosmetic engine cover.
  4.  
  5. Remove the rear alternator brace.
  6.  
  7. Tag for identification and remove the right (rear) spark plug wires.
  8.  
  9. Remove the engine cover retaining bracket from the exhaust manifold studs.
  10.  
  11. Remove the right (rear) engine lift bracket from the exhaust manifold studs.
  12.  
  13. Remove the rocker arm cover bolts and remove the cover from the engine. Do not pry it off. Bump the cover sideways with a rubber mallet if it is stuck. Discard the gasket.
  14.  

To install:

  1. Clean all parts well including the sealing surfaces on both the cylinder head and the cover gasket flange. Clean any thread-locking compound from the rocker arm cover bolts.
  2.  
  3. Install a new gasket making sure the gasket is properly seated in the cover groove. Install the cover. Apply thread-locking compound GM #12345493 or equivalent to the bolt threads and install the cover bolts. Torque to 89 inch lbs. (10 Nm).
  4.  
  5. Install the remaining components in the reverse order of the removal process.
  6.  

 
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