Chevrolet Sonic Repair Manual: Throttle Body Inspection and Cleaning
Note:
Over extended time and mileage, deposits may accumulate on the back of the throttle valve plate. The source of the deposit is exhaust gas. Typically these deposits pose no problem. Occasionally the deposit may accumulate to a point where perceived pedal effort or throttle valve movement is effected.
- Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
- Inspect the throttle body bore and the throttle valve plate for deposits. You will need to open the throttle valve in order to inspect all surfaces.
- Clean the throttle body bore and the throttle valve plate using a clean shop towel with an appropriate cleaner.
- Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
Throttle Body Heater Outlet Pipe Replacement (LUW)
Throttle Body Heater Outlet Pipe Replacement
Callout
Component Name
Preliminary Procedure
Drain the cooling system. Refer to Co ...
Throttle Body Installation
Install the throttle body (2) and a NEW throttle body
seal ring (1).
Caution: Refer to Fastener Caution.
Install the 4 throttle body bolts (3) an ...
Other materials:
Driving on Snow or Ice
Drive carefully when there is snow or ice between the tires and the road, creating
less traction or grip.
Wet ice can occur at about 0°C (32°F) when freezing rain begins to fall, resulting
in even less traction. Avoid driving on wet ice or in freezing rain until roads
can be treated with sa ...
Brake Pipe and Hose Inspection
Warning: Refer to Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components
Caution.
Visually inspect all of the brake pipes for the following conditions:
Kinks, incorrect routing, missing or damaged retainers
Leaking fittin ...
Cylinder Head Assemble
Special Tools
EN-958 Valve Stem Seal Installer
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.
Lubricate the valve stem and the valve guide with clean engine oil.
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