Camaro, Firebird, 1999 - 2002

Timing Chain Cover & Seal

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Removal & Installation



3.8L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the crankcase and cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Air cleaner and intake air duct
     
    Coolant pump pulley bolts, loosen
     
    Drive belt tensioner
     
    Power steering pump pulley, if necessary
     
    Inlet hose from the power steering pump, if necessary
     

  6.  
  7. Reposition the hose clamp on the return line, if necessary.

    Reservoir hose return line from the power steering pump, if necessary
     
    Power steering pump, if necessary
     
    Crankshaft balancer
     
    Crankshaft Position (CKP) sensor shield and the sensor
     
    Oil pan-to-front cover bolts
     
    Oil pan bolts, loosen and lower the pan slightly
     
    Water pump
     
    Radiator outlet hose from the front cover
     
    Front cover bolts and studs
     
    Cover and gasket
     
    Crankshaft seal from the cover
     

  8.  
  9. Align the timing marks on the sprockets so they are as close together as possible.

    Timing chain damper
     
    Camshaft sprocket and timing chain
     
    Crankshaft sprocket

    Click image to see an enlarged view

    Fig. Exploded view of the timing chain and sprockets and timing mark alignment-3.8L engine



    Click image to see an enlarged view

    Fig. Exploded view of the front cover mounting and bolt locations-3.8L engine



    Click image to see an enlarged view

    Fig. Exploded view of the balance shaft assembly-3.8L engine

     

  10.  

To install:

  1. If the crankshaft has been turned in the engine, perform the following:
    1. Turn the crankshaft so the No. 1 piston is at top Dead Center (TDC) of its compression stroke.
    2.  
    3. Turn the camshaft so that, with the sprocket temporarily installed, the timing mark is straight down.
    4.  

  2.  
  3. Install or connect the following:

    Timing chain on the sprockets with the timing marks aligned
     
    Timing chain and sprockets. Torque the bolt to 74 ft. lbs. (100 Nm) plus an additional 90 degrees.
     
    Timing chain damper. Torque the bolt to 16 ft. lbs. (22 Nm).
     

  4.  
  5. Rotate the engine 2 revolutions, then check to be sure the timing marks are aligned.

    Front cover with a new crankshaft oil seal. Torque the fasteners to 15 ft. lbs. (20 Nm) plus 40 degrees.
     
    Radiator outlet hose to the front cover
     
    Water pump
     
    Oil pan-to-front cover bolts. Torque the bolts to 125 inch lbs. (14 Nm).
     
    Oil pan bolts
     
    CKP sensor and torque the fasteners to 15 ft. lbs. (20 Nm) plus 40 degrees
     
    CKP sensor shield
     
    Crankshaft balancer
     
    Power steering pump, hoses and pulley, if necessary
     
    Drive belt tensioner
     
    Air cleaner assembly
     
    Negative battery cable
     

  6.  
  7. Refill the crankcase and cooling system.
  8.  
  9. Start the engine and check for leaks.
  10.  

5.7L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the crankcase and cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Mass Air flow (MAF) sensor electrical connector
     
    Intake Air Temperature (IAT) sensor electrical connector
     
    Air intake duct
     
    Drive belt
     
    Radiator hoses from the water pump and water outlet
     
    Upper radiator support
     
    Fan shroud
     
    Drive belt tensioner
     
    Overflow hose from the radiator
     
    Throttle body heater hose from the radiator
     
    Drive belt idler pulley
     
    Water pump
     
    Starter motor
     
    Crankshaft balancer
     
    Oil pan
     
    Front cover
     
    Oil pump
     

  6.  
  7. Rotate the crankshaft until the timing marks on the crankshaft and camshaft sprockets are aligned.
  8.  
  9. Remove or disconnect the following:
    WARNING
    Do not turn the crankshaft after the timing chain has been removed to prevent damage to the pistons or valves.



    Camshaft sprocket and timing chain
     
    Crankshaft sprocket
     



    Click image to see an enlarged view

    Fig. When assembled, be sure the marks on the gears are facing each other-5.7L engine



    Click image to see an enlarged view

    Fig. Use a gear puller to remove, and a large socket to install, the crankshaft sprocket-5.7L engine shown

  10.  

To install:

  1. Install or connect the following:

    Crankshaft sprocket
     
    Camshaft sprocket and timing chain assembly. Torque the bolts to 26 ft. lbs. (35 Nm).
     
    Oil pump
     
    NEW crankshaft oil seal to the front cover
     

  2.  
  3. Apply a 0.20 inch (5mm) bead of RTV sealant to the corner where the oil pan meets the engine block.
    WARNING
    The camshaft sprocket and water pump propeller shaft gears must mesh or damage to the camshaft retainer may occur.



    Front cover. Torque the bolts to 18 ft. lbs. (25 Nm).
     
    Oil pan. Torque the oil pan-to-block and oil pan-to-front cover bolts to 18 ft. lbs. (25 Nm) and the oil pan-to-rear cover bolts to 106 inch lbs. (12 Nm).
     
    Crankshaft balancer. Torque the bolt to 37 ft. lbs. (50 Nm), then an additional 120 degrees.
     
    Starter motor. Torque the bolts to 35 ft. lbs. (47 Nm).
     
    Water pump. Torque the bolts to 105 inch lbs. (12 Nm).
     



    Drive belt idler pulley. Torque the bolt to 37 ft. lbs. (50 Nm).
     
    Throttle body heater hose to the radiator
     
    Overflow hose to the radiator
     
    Drive belt tensioner. Torque the bolts to 37 ft. lbs. (50 Nm).
     
    Fan shroud
     
    Upper radiator support
     
    Radiator hoses to the water pump and water outlet
     
    Drive belt
     
    Air intake duct
     
    MAF sensor electrical connector
     
    IAT sensor electrical connector
     
    Negative battery cable
     

  4.  
  5. Refill the engine crankcase.
  6.  
  7. Refill the cooling system.
  8.  
  9. Operate the engine and check for leaks.
  10.  

 
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