Camaro, Firebird, 1999 - 2002

Camshaft & Valve Lifters

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Removal & Installation



3.8L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Recover the refrigerant in the air conditioning system.
  4.  
  5. Drain the engine cooling system.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Radiator with the air conditioning condenser assembly
     
    Upper intake manifold
     
    Rocker arm covers
     
    Rocker arms and the push rods
     
    Lower intake manifold
     
    Valve lifter guides
     
    Valve lifters
     
    Front cover
     
    Camshaft sprocket and timing chain
     
    Balance shaft gear
     
    Camshaft thrust plate
     
    Camshaft key
     

  8.  
  9. Install 3 5 / 16 -18 x 4-inch bolts in the camshaft bolt holes.
  10.  
  11. Carefully rotate and pull the camshaft assembly out of the bearings.
  12.  

To install:

  1. Install or connect the following:
    NOTE
    Make sure the push rods are seated in the lifter seat.



    Camshaft lubricated with assembly lubricant
     
    Camshaft key
     
    Thrust plate. Torque the bolts to 11 ft. lbs. (15 Nm).
     
    Balance shaft gear
     
    Camshaft sprocket
     
    Timing chain
     
    Front cover
     
    Valve lifters
     
    Valve lifter guides
     
    Lower intake manifold
     
    Rocker arms and push rods
     

  2.  
  3. The engine must be on the No. 1 firing position before proceeding.
  4.  
  5. Tighten exhaust valves No. 1, 2 and 3; then intake valves No. 1, 5 and 6.
  6.  
  7. Loosen the adjusting nut until lash is felt at the push rod.
  8.  
  9. Tighten the adjusting nut until all lash is removed, then tighten the nut an additional 1 1 / 2 turns to center the lifter plunger.
  10.  
  11. Rotate the crankshaft 1 revolution until the -0- timing mark is once again aligned.
  12.  
  13. Adjust exhaust valves No. 4, 5 and 6 and intake valves No. 2, 3 and 4.
  14.  
  15. Install or connect the following:

    Rocker arm cover
     
    Upper intake manifold
     
    Radiator with the air conditioning condenser assembly
     
    Negative battery cable
     

  16.  
  17. Evacuate and recharge the air conditioning system.
  18.  
  19. Refill the cooling system.
  20.  
  21. Start the engine and check for leaks.
  22.  

5.7L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Recover the refrigerant from the air conditioning system.
  4.  
  5. Drain the engine cooling system.
  6.  
  7. Remove or disconnect the following:
    WARNING
    All camshaft journals are the same diameter so care must be used when removing the camshaft to avoid damaging the bearings.



    Negative battery cable
     
    Intake manifold
     
    Exhaust manifold
     
    Rocker arm covers
     
    Rocker arms and push rod assemblies
     
    Cylinder head
     
    Valve lifters
     
    Radiator with the condenser
     
    Front cover
     
    Oil pan
     
    Oil pump drive assembly
     
    Timing chain and sprocket
     
    Camshaft retainer
     

  8.  
  9. Install 3 5 / 16 -18 x 4-inch bolts in the camshaft bolt holes.
  10.  
  11. Carefully rotate and pull the camshaft assembly out of the bearings.

    Click image to see an enlarged view

    Fig. Unfasten the retaining bolt and clamp, then remove the oil pump drive-5.7L engines



    Click image to see an enlarged view

    Fig. Thread 3 bolts into the camshaft to facilitate removal and installation-5.7L engines

  12.  

To install>


NOTE
When installing a new camshaft assembly, coat the camshaft lobes with Molykote® or equivalent. When installing a new camshaft, replace all valve lifters to ensure durability of the camshaft lobes and lifters.

  1. Install or connect the following:
    NOTE
    Make sure the push rods are seated in the lifter seat.



    Camshaft
     
    Camshaft retainer. Torque the bolts to 18 ft. lbs. (25 Nm).
     
    Timing chain and camshaft sprocket
     
    Oil pump drive assembly. Torque the bolt to 25 ft. lbs. (34 Nm).
     
    Oil pan
     
    Front cover
     
    Radiator with the air conditioning condenser
     
    Air conditioning receiver and dehydrator hose to the condenser
     
    Air conditioning compressor and condenser hose to the condenser
     
    Valve lifters
     
    Cylinder head with a new gasket
     
    Push rods and rocker arms
     

  2.  
  3. Place the engine on Top Dead Center (TDC) of the No. 1 firing position.
  4.  
  5. Tighten the exhaust valves No. 1, 2, 7 and 8; then intake valves No. 1, 3, 4 and 5 to 22 ft. lbs. (30 Nm).
  6.  
  7. Rotate the crankshaft 1 revolution until the -0- timing mark is once again aligned.
  8.  
  9. Adjust exhaust valves No. 3, 4, 5 and 6; then intake valves 2, 6, 7 and 8 to 22 ft. lbs. (30 Nm).
  10.  
  11. Install or connect the following:

    Exhaust manifold
     
    Rocker arm covers
     
    Intake manifold with a new gasket
     
    Negative battery cable
     

  12.  
  13. Recharge the air conditioning system.
  14.  
  15. Fill the engine cooling system.
  16.  

 
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