Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Cylinder Head Disassemble

Special Tools

For equivalent regional tools, refer to Special Tools.


    Install the EN-50717?E assembly (1) to the EN-8062 compressor
  1. Install the EN-50717?E assembly (1) to the EN-8062 compressor (4).
  2. Install the EN-8062?E adapter (3) to the EN-8062 compressor.
  3. Install the compressor assembly to the cylinder head, so that the adapter (5) of the EN-50717?E assembly (1) contacts the valve spring retainer properly and the EN-8062?E adapter (3) contacts the valve disc (2). Prefix the EN-8062 compressor (4).


  4. Warning:

    Valve springs can be tightly compressed. Use care when removing the retainers and plugs. Personal injury could result.

  5. Apply pressure to the EN-50717?E assembly to push down the vale spring retainer (1) and compress the valve spring (3) until the valve keys (2) are free from tension. Carefully remove the valve keys.


  6. Slowly and carefully loosen the EN-50717?E assembly until the valve spring is entirely expanded.
  7. Remove the compressor assembly from the cylinder head.
  8. Remove the valve spring retainer (1) and the valve spring (3).
  9. Remove and DISCARD the valve stem oil seal (4), using the EN-840 pliers (2).
  10. Remove the valve (5).
  11. Note:

    Ensure that the valve train components are kept together and identified in order for proper installation in their original position.

  12. Repeat the procedure with the remaining valves.
  13. In case of re-using the cylinder head, refer to Cylinder Head Cleaning and Inspection.
Cylinder Head Cleaning and Inspection
Valve Cleaning and Inspection Warning: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin. Note: Do not scratch the valve ste ...

Cylinder Head Installation
Special Tools EN-45059 Torque Angle Sensor Kit For equivalent regional tools, refer to Special Tools. Clean the sealing surfaces. Inspect for plane surface. Cylinder block, cylinder h ...

Other materials:

Park Brake Hardware Inspection
Warning: Refer to Brake Dust Warning. Visually inspect the park brake lever (1) and the lever pivot pin (2) for the following conditions: The lever being bent or broken at any point – particularly at the cable attachment A seized or binding condition ...

Front Wheel Speed Sensor Replacement
Removal Procedure Warning: Refer to Brake Dust Warning. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation. Clean the wheel speed sensor mounting area on t ...

Electronic Component Description
Control Solenoid Valve Assembly (1) Pressure Control Solenoid 3 (R-1/4-5-6) (2) (GEN 1) Pressure Control Solenoid 2 (3-5-R) (2) (GEN 2) Pressure Control Solenoid 5 (1-2-3-4) ...

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