GM Caprice 1990-1993 Repair Guide

Rocker Arm (Valve) Cover

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See Figures 1 and 2



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Fig. Fig. 1: Valve cover removal - 4.3L engine



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Fig. Fig. 2: Valve cover removal - 5.0L (VIN E) and 5.7L engines

REMOVAL AND INSTALLATION



4.3L ENGINE
Right Side
  1. Disconnect the negative battery cable. Remove the air cleaner.
  2.  
  3. At the engine, disconnect the heater hoses from the evaporator case and bracket.
  4.  
  5. At the intake manifold, disconnect the heater hose and the wiring harness bracket. Remove the rocker arm cover bolts and the breather pipe.
  6.  
  7. Disconnect and plug the fuel lines. Disconnect the clips and the spark plug wires at the distributor.
  8.  
  9. Remove the rocker arm cover retaining bolts. Remove the rocker arm cover.
  10.  

To install:
  1. Thoroughly clean old gasket from valve cover and cylinder head.
  2.  
  3. Install a new gasket onto the valve cover.
  4.  
  5. Install the rocker arm cover. Install the rocker arm cover retaining bolts. Torque the bolts to 97 inch lbs. (11 Nm).
  6.  
  7. Connect the fuel lines. Connect the clips and the spark plug wires at the distributor.
  8.  
  9. Connect the heater hose and the wiring harness bracket at the manifold. Install the breather pipe.
  10.  
  11. At the engine, connect the heater hoses to the evaporator case and bracket.
  12.  
  13. Connect the negative battery cable. Install the air cleaner.
  14.  
  15. Inspect for leaks.
  16.  

Left Side
  1. Disconnect the negative battery cable and remove the air cleaner.
  2.  
  3. At the rocker arm cover, disconnect the PCV valve.
  4.  
  5. Remove the AIR hose at the manifold and spark plug wire clips.
  6.  
  7. Disconnect the alternator wire harness.
  8.  
  9. Remove the rocker arm cover bolts and the cover.
  10.  

To install:
  1. Thoroughly clean old gasket from valve cover and cylinder head.
  2.  
  3. Install a new gasket onto the valve cover.
  4.  
  5. Install the rocker arm cover. Install the rocker arm cover retaining bolts. Torque the bolts to 97 inch lbs. (11 Nm).
  6.  
  7. Connect the alternator wire harness.
  8.  
  9. At the rocker arm cover, connect the PCV valve.
  10.  
  11. Install the AIR hose at the manifold and spark plug wire clips.
  12.  
  13. Connect the negative battery cable and Install the air cleaner.
  14.  

5.0L (VIN E) AND 5.7L ENGINES
Right Side
  1. Disconnect the negative battery cable. Remove the air cleaner.
  2.  
  3. Disconnect the ECM wire harness from the intake manifold and the oxygen sensor, as necessary.
  4.  
  5. At the exhaust manifold, disconnect the AIR valve and hose.
  6.  
  7. Disconnect the wires from the alternator and the spark plugs, then the harness from the rocker cover, position it to the side.
  8.  
  9. Remove the EGR valve. Remove the rocker arm cover bolts and the cover.
  10.  

To install:
  1. Thoroughly clean old gasket from valve cover and cylinder head.
  2.  
  3. Install a new gasket onto the valve cover.
  4.  
  5. Install the rocker arm cover. Install the rocker arm cover retaining bolts. Torque the bolts to 97 inch lbs. (11 Nm).
  6.  
  7. Install the EGR valve and spark plug wires.
  8.  
  9. Connect the wires to the alternator, then the position the harness onto the rocker cover.
  10.  
  11. At the exhaust manifold, connect the AIR valve and hose.
  12.  
  13. Connect the ECM wire harness to the intake manifold and the oxygen sensor.
  14.  
  15. Connect the negative battery cable. Install the air cleaner.
  16.  

Left Side
  1. Disconnect the negative battery cable. Remove the air cleaner.
  2.  
  3. Disconnect the power brake pipe from the manifold and the booster.
  4.  
  5. Disconnect the AIR hose from the exhaust manifold. Remove the PCV valve.
  6.  
  7. Disconnect the wire from the oxygen sensor. Disconnect the fuel lines from the TBI unit.
  8.  
  9. Remove the A/C evaporator hose, as required.
  10.  
  11. Remove the rocker arm cover bolts and the cover.
  12.  

To install:
  1. Thoroughly clean old gasket from valve cover and cylinder head.
  2.  
  3. Install a new gasket onto the valve cover.
  4.  
  5. Install the rocker arm cover. Install the rocker arm cover retaining bolts. Torque the bolts to 97 inch lbs. (11 Nm).
  6.  
  7. Install the A/C evaporator hose, if removed.
  8.  
  9. Connect the wire to the oxygen sensor. Connect the fuel lines from the TBI unit.
  10.  
  11. Connect the AIR hose to the exhaust manifold. Install the PCV valve.
  12.  
  13. Connect the power brake pipe to the intake manifold and the brake booster.
  14.  
  15. Connect the negative battery cable. Install the air cleaner.
  16.  

5.0L (VIN Y) ENGINE
RIGHT SIDE
  1. Disconnect the negative battery cable. Remove the air cleaner.
  2.  
  3. Disconnect the spark plug wires. Remove the air conditioning compressor bracket, as required.
  4.  
  5. Disconnect the required electrical wires and vacuum hoses. Remove the PCV valve and hose.
  6.  
  7. Remove the canister purge hose.
  8.  
  9. Remove the AIR pump pulley, belt, hoses and valve.
  10.  
  11. Remove the valve cover retaining bolts. Remove the valve cover.
  12.  

To install:
  1. Thoroughly clean old gasket from valve cover and cylinder head.
  2.  
  3. Install a new gasket onto the valve cover.
  4.  
  5. Install the rocker arm cover. Install the rocker arm cover retaining bolts. Torque the bolts to 97 inch lbs. (11 Nm).
  6.  
  7. Install the AIR pump pulley, belt, hoses and valve.
  8.  
  9. Install the canister purge hose.
  10.  
  11. Disconnect the required electrical wires and vacuum hoses. Install the PCV valve and hose.
  12.  
  13. Connect the spark plug wires. Install the air conditioning compressor bracket, if removed.
  14.  
  15. Connect the negative battery cable. Install the air cleaner.
  16.  

LEFT SIDE
  1. Disconnect the negative battery cable. Remove the air cleaner.
  2.  
  3. Disconnect the spark plug wires. Remove the EGR valve assembly to gain clearance.
  4.  
  5. Disconnect the required electrical wires. Loosen the exhaust manifold upper shroud assembly.
  6.  
  7. Remove the ILC anti-dieseling solenoid.
  8.  
  9. Remove the alternator drive belt and rear bracket.
  10.  
  11. Remove the oil level indicator.
  12.  
  13. Remove the valve cover retaining bolts. Remove the valve cover.
  14.  

To install:
  1. Thoroughly clean old gasket from valve cover and cylinder head.
  2.  
  3. Install a new gasket onto the valve cover.
  4.  
  5. Install the rocker arm cover. Install the rocker arm cover retaining bolts. Torque the bolts to 97 inch lbs. (11 Nm).
  6.  
  7. Install the oil level indicator.
  8.  
  9. Install the alternator drive belt and rear bracket.
  10.  
  11. Install the ILC anti-dieseling solenoid.
  12.  
  13. Connect all previously disconnected electrical wires. Tighten the exhaust manifold upper shroud assembly.
  14.  
  15. Connect the spark plug wires. Install the EGR valve assembly.
  16.  
  17. Connect the negative battery cable. Install the air cleaner.
  18.  

 
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