Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Cylinder Head Assemble

Special Tools

For equivalent regional tools, refer to Special Tools.


    Lubricate the valve stem and the valve guide with clean engine oil.
  1. Lubricate the valve stem and the valve guide with clean engine oil.
  2. Note:

    Ensure all valve train components will be installed in their original position.

  3. Install the valve (5).
  4. Install the NEW valve stem oil seal (4), using the EN-958 installer (2).
  5. Loosely install the valve spring (3) and the valve spring retainer (1).

  6. Install the EN-50717?E assembly (1) to the EN-8062 compressor (4).
  7. Install the EN-8062?E adapter (3) to the EN-8062 compressor .
  8. 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).


  9. Caution:

    The valve stem keys must correctly seat in the valve spring cap. Engine damage may occur by not installing properly.

  10. 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) can be inserted. Carefully insert the valve keys then, so that they are proper installed to the valve stem grooves.
  11. Carefully release the tension from the EN-50717?E assembly .
  12. Inspect the valve keys and valve spring retainers for proper seat.
  13. Remove the compressor assembly from the cylinder head.
  14. Repeat the procedure with the remaining valves.
Cylinder Head
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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 ...

Other materials:

Low Fuel Warning Light
This light comes on for a few seconds when the ignition is turned on as a check to indicate it is working. If it does not come on, have it fixed. This light comes on when the vehicle is low on fuel. The low fuel warning light comes on when there are approximately 6.0 L (1.7 gal) of fuel rema ...

Rear Compartment Courtesy Lamp Replacement (Hatchback)
Rear Compartment Courtesy Lamp Replacement Callout Component Name 1 Rear Compartment Courtesy Lamp Assembly Procedure Use the appropriate trim tool in order to release the lamp assembly from the rear quarter ...

Control Valve Body Cover Replacement
Removal Procedure Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. Remove the front bumper fascia opening lower cover. Refer to Front Bumper ...

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