Chevrolet Sonic Repair Manual: Cylinder Head Disassemble
Special Tools
- EN-840 Pliers/Remover
- EN-8062 Valve Spring Compressor
- EN-8062-5 Adapter
- EN-50717-2 Compressor Assembly of EN-50717 Kit
For equivalent regional tools, refer to Special Tools.
- Install the EN-50717?E assembly (1) to the EN-8062 compressor
(4).
- Install the EN-8062?E adapter (3) to the EN-8062 compressor.
- 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).
Warning:
Valve springs can be tightly compressed. Use care when
removing the retainers and plugs. Personal injury could result.
- 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.
- Slowly and carefully loosen the EN-50717?E assembly until the valve
spring is entirely expanded.
- Remove the compressor assembly from the cylinder head.
- Remove the valve spring retainer (1) and the valve spring (3).
- Remove and DISCARD the valve stem oil seal (4), using the EN-840
pliers (2).
- Remove the valve (5).
Note:
Ensure that the valve train components are kept together
and identified in order for proper installation in their original position.
- Repeat the procedure with the remaining valves.
- In case of re-using the cylinder head, refer to 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 ...
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:
Battery Replacement
The battery is not rechargeable. To replace the battery:
Caution
When replacing the battery, do not touch any of the circuitry on the transmitter.
Static from your body could damage the transmitter.
1. Press the button on the transmitter to extend the key.
2. Remove the battery cover by prying ...
Airbag Front Passenger Presence Sensor Replacement
Airbag Front Passenger Presence Sensor Replacement
Callout
Component Name
Warning: Replace the passenger presence system as a complete
assembly to prevent possible injury to the occupant. All the components
in the se ...
Battery Replacement
Removal Procedure
Open the hood.
Disconnect the negative battery cable. Refer to Battery Negative Cable
Disconnection and Connection.
Remove the battery retainer bolt (1) and the battery retainer (2).
Loosen the battery positive cable ju ...
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