S10 Pickup, Sonoma 2000-2004

Valve Covers

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Removal & Installation



4.3L Engine
Left Side
  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the breather tube at the air cleaner outlet duct.
  4.  
  5. Remove the air cleaner outlet duct.
  6.  
  7. Partially drain the cooling system.
  8.  
  9. Remove the radiator inlet hose from the water outlet housing.
  10.  
  11. Remove the PCV valve hose assembly from the valve rocker arm cover. The PCV orifice is part of the valve cover and cannot be removed. If damaged, replace the valve cover.
  12.  
  13. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
  14.  
  15. Remove the valve rocker arm cover bolts.
  16.  
  17. Remove the valve rocker arm cover bolt grommets.
  18.  
  19. Discard the valve rocker arm cover bolt grommets.
  20.  
  21. Remove the valve rocker arm cover.
  22.  
  23. Remove the valve rocker arm cover gasket.
  24.  
  25. Discard the valve rocker arm cover gasket.
  26.  
  27. Clean the valve rocker arm cover in cleaning solvent.
  28.  
  29. Dry the valve rocker arm cover with compressed air.

    Click image to see an enlarged view

    Fig. Valve rocker arm cover-4.3L engine

  30.  

To install:


NOTE
Do not reuse the valve cover gasket or the valve rocker arm cover bolt grommets.

  1. Install the NEW valve rocker arm cover gasket into the groove of the valve rocker arm cover.
  2.  
  3. Install the NEW valve rocker arm cover bolt grommets into the valve rocker arm cover.
  4.  
  5. Install the valve rocker arm cover onto the cylinder head.
  6.  
  7. Install the valve rocker arm cover bolts. Tighten the valve rocker arm cover bolts to 106 inch lbs. (12 Nm).
  8.  
  9. Install the radiator inlet hose to the water outlet housing.
  10.  
  11. Fill the cooling system.
  12.  
  13. Install the PCV valve hose assembly to the valve rocker arm cover.
  14.  
  15. Connect the ECT sensor electrical connector.
  16.  
  17. Install air cleaner outlet duct.
  18.  
  19. Connect the breather tube to the air cleaner outlet duct.
  20.  
  21. Connect the negative battery cable.
  22.  

Right Side
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the breather tube from the air cleaner outlet duct and the valve rocker arm cover.
  4.  
  5. Disconnect the spark plug wires from the spark plugs for the right side of the engine.
  6.  
  7. Remove the EVAP canister purge solenoid valve.
  8.  
  9. Unfasten the heater hose retainer above the valve rocker arm cover.
  10.  
  11. Move and secure the heater hoses aside.
  12.  
  13. Remove the bolt (3) holding the engine wiring harness bracket to the generator.
  14.  
  15. Disconnect the Crankshaft Position (CKP) sensor electrical connector (2).
  16.  
  17. Move and secure the engine wiring harness aside.
  18.  
  19. Remove the valve rocker arm cover bolts.
  20.  
  21. Remove the valve rocker arm cover bolt grommets.
  22.  
  23. Discard the valve rocker arm cover bolt grommets.
  24.  
  25. Remove the valve rocker arm cover.
  26.  
  27. Remove the valve rocker arm cover gasket.
  28.  
  29. Discard the valve rocker arm cover gasket.
  30.  
  31. Clean the valve rocker arm cover in cleaning solvent.
  32.  
  33. Dry the valve rocker arm cover with compressed air.
  34.  

To install:


NOTE
Do not reuse the valve cover gasket or the valve rocker arm cover bolt grommets.

  1. Install the NEW valve rocker arm cover gasket into the groove of the valve rocker arm cover.
  2.  
  3. Install the NEW valve rocker arm cover bolt grommets into the valve rocker arm cover.
  4.  
  5. Install the valve rocker arm cover onto the cylinder head.
  6.  
  7. Install the valve rocker arm cover bolts. Tighten the valve rocker arm cover bolts to 106 inch lbs. (12 Nm).
  8.  
  9. Position the engine wiring harness.
  10.  
  11. Connect the CKP sensor electrical connector.
  12.  
  13. Install the engine wiring harness and the bolt to the generator mounting bracket. Tighten the engine wiring harness bolt to 18 ft. lbs. (25 Nm).
  14.  
  15. Position the heater hoses.
  16.  
  17. Install the heater hoses in the retainer above the valve rocker arm cover.
  18.  
  19. Install the EVAP canister purge solenoid valve.
  20.  
  21. Connect the spark plug wires to the spark plugs for the right side of the engine.
  22.  
  23. Install the breather tube to the air cleaner outlet duct and the valve rocker arm cover.
  24.  
  25. Connect the negative battery cable.
  26.  

 
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