Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo, Regal 2001-2005

Rocker Arms

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Removal & Installation



3.1L And 3.4L Engines
Left Side
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:
    NOTE
    Keep the pushrods in order. Intake pushrods are 5 3 / 4 inches long and exhaust pushrods are 6 inches long.



    Spark plug wires
     
    Engine mount strut
     
    Secondary Air Injection (AIR) check valve pipe, if equipped
     
    Thermostat bypass hose and pipe
     
    Positive Crankcase Ventilation (PCV) valve from the rocker arm cover
     
    Rocker arm cover
     



    Rocker arm bolts
     
    Rocker arms
     
    Pushrods
     

  8.  

To install:

  1. Lubricate all the valvetrain components with engine oil.
  2.  
  3. Install or connect the following:

    Pushrods and the rocker arms and tighten the bolts to 89 inch lbs. (10 Nm) plus an additional 30 degree turn on 3.1L engines or 14 ft. lbs. (19 Nm) plus 30 degrees on 3.4L engines
     
    Rocker arm cover using a new gasket and tighten the rocker cover bolts to 89 inch lbs. (10 Nm)
     
    PCV valve to the rocker arm cover
     
    Coolant tube with the thermostat bypass hose and tighten the bolt to 98 inch lbs. (11 Nm) and the nut to 18 ft. lbs. (25 Nm)
     
    AIR check valve pipe and torque the adapters to 22 ft. lbs. (30 Nm)
     
    Engine mount strut and torque the bolt to 35 ft. lbs. (48 Nm)
     
    Spark plug wires
     
    Negative battery cable
     

  4.  
  5. Refill the cooling system.
  6.  
  7. Start the vehicle and verify no leaks.
  8.  

Right Side
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Accessory drive belt
     
    Alternator
     
    Alternator Bracket
     
    Spark plug wires
     
    Ignition coil and Evaporative (EVAP) emissions canister purge solenoid as an assembly
     
    Power brake booster vacuum pipe from the intake plenum
     
    Rocker arm cover
     
    Rocker arm bolts, balls, rocker arms and pushrods
     

  4.  

To install:

  1. Lubricate all the valve train components with engine oil.
  2.  
  3. Install or connect the following:

    Pushrods and the rocker arms and tighten the bolts to 89 inch lbs. (10 Nm) plus an additional 30 degree turn on 3.1L engines or 14 ft. lbs. (19 Nm) plus 30 degrees on 3.4L engines
     
    Rocker arm cover using a new gasket and tighten the rocker cover bolts to 89 inch lbs. (10 Nm)
     
    Power brake booster vacuum pipe to the plenum
     
    EVAP solenoid and ignition coil assembly
     
    Spark plug wires
     
    Alternator bracket and torque the bolts to 37 ft. lbs. (50 Nm)
     
    Alternator and torque the bolts to 37 ft. lbs. (50 Nm)
     
    Accessory drive belt
     
    Negative battery cable
     

  4.  
  5. Start the vehicle and verify no leaks.

    Click image to see an enlarged view

    Fig. Rocker arm components-3.1L and 3.4L engines



    Click image to see an enlarged view

    Fig. Rocker arm mounting-3.1L engine

  6.  

3.5L Engine

Refer to the camshaft removal and installation procedure for rocker arm service.

3.8L Engines

WARNING
The rocker arm bolts have been permanently stretched during installation. New bolts must be used each time the rocker arm assemblies are removed.


WARNING
The rocker arm bolts have been permanently stretched during installation. New bolts must be used each time the rocker arm assemblies are removed.

Left Side (Front)
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    The rocker arms, pushrods, pedestals and bolts must be kept in order for installation in the same locations they were removed from.



    Negative battery cable
     
    Engine lift bracket from the exhaust manifold studs
     
    Fuel injector sight shield
     
    Engine mount strut bracket
     
    Spark plug wires
     
    Spark plug wire cover from the valve rocker arm cover
     
    Rocker arm cover
     



    Rocker arm bolts, pedestals, rocker arms and pushrods
     

  4.  

To install:

  1. Apply thread locking compound to the rocker arm bolts.
  2.  
  3. Install or connect the following:

    Pushrod in the lifter
     
    Rocker arm, pedestal and mounting bolt and tighten the mounting bolt to 11 ft. lbs. (15 Nm) plus an additional 90 degrees
     
    Rocker arm cover with a new gasket and torque the mounting bolts to 89 inch lbs. (10 Nm)
     
    Spark plug wire cover to the rocker arm cover
     
    Spark plug wires
     
    Engine mount strut bracket and torque the bolt to 75 ft. lbs. (102 Nm)
     
    Fuel injector sight shield
     
    Engine lift bracket to the exhaust manifold and torque the bolt to 22 ft. lbs. (30 Nm)
     
    Negative battery cable
     

  4.  
  5. Start the vehicle and check for leaks, repair if necessary.

    Click image to see an enlarged view

    Fig. Exploded view of the rocker arm, pushrod and pushrod guide plate assembly-3.8L engine

  6.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    The rocker arms, pushrods, pedestals and bolts must be kept in order for installation in the same locations they were removed from.



    Negative battery cable
     
    Engine lift bracket from the exhaust manifold studs
     
    Fuel injector sight shield
     
    Engine mount strut bracket
     
    Spark plug wires
     
    Spark plug wire cover from the valve rocker arm cover
     
    Rocker arm cover
     



    Rocker arm bolts, pedestals, rocker arms and pushrods
     

  4.  

To install:

  1. Apply thread locking compound to the rocker arm bolts.
  2.  
  3. Install or connect the following:

    Pushrod in the lifter
     
    Rocker arm, pedestal and mounting bolt and tighten the mounting bolt to 11 ft. lbs. (15 Nm) plus an additional 90 degrees
     
    Rocker arm cover with a new gasket and torque the mounting bolts to 89 inch lbs. (10 Nm)
     
    Spark plug wire cover to the rocker arm cover
     
    Spark plug wires
     
    Engine mount strut bracket and torque the bolt to 75 ft. lbs. (102 Nm)
     
    Fuel injector sight shield
     
    Engine lift bracket to the exhaust manifold and torque the bolt to 22 ft. lbs. (30 Nm)
     
    Negative battery cable
     

  4.  
  5. Start the vehicle and check for leaks, repair if necessary.

    Click image to see an enlarged view

    Fig. Exploded view of the rocker arm, pushrod and pushrod guide plate assembly-3.8L engine

  6.  

Right Side (Rear)
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Fuel injector sight shield
     
    Accessory drive belt
     
    Alternator
     
    Drive belt tensioner
     
    Engine mount struts
     
    Throttle body air inlet duct
     

  4.  
  5. Rotate the engine forward for proper access.
    NOTE
    The rocker arms, pushrods, pedestals and bolts must be kept in order for installation in the same locations they were removed from.



    Evaporative (EVAP) emissions purge solenoid and brace
     
    Right side spark plug wires
     
    Fuel injector sight shield bracket
     
    Rocker arm cover
     



    Rocker arm bolts, pedestals, rocker arms and pushrods
     

  6.  

To install:

  1. Seat the pushrod in the lifter and install the rocker arm, pedestal and mounting bolt. Tighten the mounting bolt to 11 ft. lbs. (15 Nm) plus an additional 90 degrees.
  2.  
  3. Install or connect the following:

    Rocker arm cover using a new gasket and torque the bolts to 89 inch lbs. (10 Nm)
     
    Fuel injector sight shield bracket and torque the bolts to 22 ft. lbs. (30 Nm)
     
    EVAP purge solenoid and brace
     
    Right side spark plug wires
     

  4.  
  5. Return the engine back to its original position.

    Throttle body air inlet duct
     
    Engine mount struts and torque the bolt to 35 ft. lbs. (48 Nm)
     
    Drive belt tensioner and torque the bolts to 37 ft. lbs. (50 Nm)
     
    Alternator and torque the bolt to 37 ft. lbs. (50 Nm)
     
    Fuel injector sight shield
     
    Negative battery cable
     

  6.  
  7. Start the vehicle and check for leaks, repair if necessary.
  8.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Fuel injector sight shield
     
    Accessory drive belt
     
    Alternator
     
    Drive belt tensioner
     
    Engine mount struts
     
    Throttle body air inlet duct
     

  4.  
  5. Rotate the engine forward for proper access.
    NOTE
    The rocker arms, pushrods, pedestals and bolts must be kept in order for installation in the same locations they were removed from.



    Evaporative (EVAP) emissions purge solenoid and brace
     
    Right side spark plug wires
     
    Fuel injector sight shield bracket
     
    Rocker arm cover
     



    Rocker arm bolts, pedestals, rocker arms and pushrods
     

  6.  

To install:

  1. Seat the pushrod in the lifter and install the rocker arm, pedestal and mounting bolt. Tighten the mounting bolt to 11 ft. lbs. (15 Nm) plus an additional 90 degrees.
  2.  
  3. Install or connect the following:

    Rocker arm cover using a new gasket and torque the bolts to 89 inch lbs. (10 Nm)
     
    Fuel injector sight shield bracket and torque the bolts to 22 ft. lbs. (30 Nm)
     
    EVAP purge solenoid and brace
     
    Right side spark plug wires
     

  4.  
  5. Return the engine back to its original position.

    Throttle body air inlet duct
     
    Engine mount struts and torque the bolt to 35 ft. lbs. (48 Nm)
     
    Drive belt tensioner and torque the bolts to 37 ft. lbs. (50 Nm)
     
    Alternator and torque the bolt to 37 ft. lbs. (50 Nm)
     
    Fuel injector sight shield
     
    Negative battery cable
     

  6.  
  7. Start the vehicle and check for leaks, repair if necessary.
  8.  

 
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