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Home >> Chevrolet >> 2010 >> Cobalt LS, 4D Sedan, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Cylinder Head) >> Cylinder Head Removal

Cylinder Head Removal

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Use fender covers to avoid damaging painted surfaces.
  • To avoid damage, unplug the wiring connectors carefully while holding the connector portion.
  • To avoid damaging the cylinder head, wait until the engine coolant temperature drops below 100 °F (38 °C) before loosening the cylinder head bolts.
  • Mark all wiring and hoses to avoid misconnection. Also, be sure that they do not contact other wiring or hoses, or interfere with other parts.
  • Keep the cam chain away from magnetic fields.
  1. Relieve the fuel pressure (see FUEL PRESSURE RELIEVING ).
  2. Drain the engine coolant (see COOLANT CHECK ).
  3. Do the 12 volt battery removal procedure (see 12 VOLT BATTERY REMOVAL AND INSTALLATION ).
  4. Remove the air cleaner (see AIR CLEANER REMOVAL/INSTALLATION ).
  5. Remove the intake manifold (see REMOVAL ).
  6. Remove the eight ignition coils (see IGNITION COIL REPLACEMENT ).
  7. Remove the following engine wire harness connectors and wire harness clamps from the cylinder head:
    • Four injector connectors
    • Engine coolant temperature (ECT) sensor 1 connector
    • Camshaft position (CMP) sensor connector
    • Secondary heated oxygen sensor (secondary HOS2) connector
    • Rocker arm oil control solenoid connector
  8. Remove the harness holder, and disconnect the breather hose (see step  3 on ).
  9. Remove the fuel pipe bolt (A) and the fuel pipe clamp (B).
    Fig 1: Identifying Fuel Pipe Bolt And Fuel Pipe Clamp
    G06428899
  10. Remove the harness holder mounting bolt (A) and the ground cable (B), then remove the harness holder (C).
    Fig 2: Identifying Harness Holder Mounting Bolt And Ground Cable With Heater Hose
    G06428900
  11. Remove the upper radiator hose (A), the water bypass hose (B), and the heater hose (C).
    Fig 3: Identifying Upper Radiator Hose, Water Bypass Hose And Heater Hose
    G06428901
  12. Remove the drive belt (see DRIVE BELT INSPECTION ).
  13. Remove the water pump (see WATER PUMP REPLACEMENT ).
  14. Remove the cylinder head cover (see CAM CHAIN CASE OIL SEAL INSTALLATION  ).
  15. Remove the warm-up three way catalytic converter (WU-TWC) (see WARM UP TWC REMOVAL/INSTALLATION ).
  16. Remove the cam chain (see CAM CHAIN REMOVAL  ).
  17. Remove the cylinder head bolts. To prevent warpage, loosen the bolts in sequence 1/3 turn at a time; repeat the sequence until all bolts are loosened.
    Fig 4: Identifying Cylinder Head Bolts Removing Sequence
    G06428902
  18. Remove the cylinder head.
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