Chevrolet Sonic Repair Manual: Engine Component Description
- Cylinder Block
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The cylinder hollow frame structured in–line 4 cylinder. The block has 5 crankshaft bearings with the thrust bearing located on the third bearing from the front of the engine.
- Crankshaft
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The crankshaft is a steel crankshaft. It is supported in 5 main journals with main bearings which have oil clearance for lubrication. The 3rd bearing is the thrust bearing which controls the proper axial end play of the crankshaft. A harmonic damper is used to control torsional vibration.
- Oil Pump
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The engine is equipped with a variable oil pump. The oil pump is integrated into the engine front cover and provides different oil pressure values depending on the engine speed.
- Oil Pan
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The oil pan is a structural aluminum oil pan with transmission attachment points. The oil suction gallery for the oil pump is integrated into the oil pan.
- Piston and Connecting Rod
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The pistons are aluminum pistons. The connecting rods are made of fractured steel. The piston pin is floating in piston bore and shrinked in connecting rod.
- Cylinder Head
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This cylinder head is a double over head camshaft (DOHC) type and has 2 camshafts that open 4 valves per cylinder with hydraulic valve lash adjusters and hydraulic valve lash adjuster arms. The cylinder head is made of cast aluminum alloy for better strength and hardness while remaining light weight. The combustion chamber of the cylinder head is designed for increasing of squish and swirl efficiency to help maximize gasoline combustion efficiency.
- Camshaft Drive with Variable Camshaft Timing
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A timing chain is used for camshaft drive. There is a tensioner to control the tension of the chain. The engine is equipped with a variable camshaft timing system. The camshaft adjuster will readjust itself depending on the engine speed. The valve timing readjusts to reduce fuel consumption and provide optimal power and torque.
- Intake Manifold
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The intake manifold provides the air flow passage to the combustion chambers through the throttle body. The intake manifold along with the throttle body have an effect on engine torque, power, noise, driveability, emission, fuel economy and performance. The intake manifold is made of plastic for better strength with maintaining a light weight.
- Turbocharger
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The turbocharger consists of turbine and compressor on a common shaft. The shaft bearing is constructed to higher rotation speed and lubricated by engine oil. The turbocharger is water cooled for improved durability. The turbine wheel is driven by exhaust emissions. The compressor wheel compresses the intake air. A bypass valve (Wastegate) regulates the charging pressure for generating a high pressure at low speed as well. At a defined charging pressure it regulates the way of the exhaust emission on bypassing the turbine wheel. The Wastegate valve is controlled pneumatic and electric from the pressure in the intake manifold. The pressure of exhaust emission is reduced by opening the Wastegate thereby reducing the intake pressure.
Electrical Power Management Description and Operation
Electrical Power Management
The electrical power management is used to monitor and control the charging
system and alert the driver of possible problems within the charging system.
The ...
Engine Cover Replacement
Engine Cover Replacement
Callout
Component Name
1
Engine Cover
Procedure
Use a suitable tool to first unclip the ...
Other materials:
Reclining Seatbacks
Warning
If either seatback is not locked, it could move forward in a sudden stop or
crash. That could cause injury to the person sitting there. Always push and pull
on the seatbacks to be sure they are locked.
To recline a manual seatback:
1. Lift the lever.
If necessary, move the safety b ...
Certification Label
Label Example
A vehicle-specific Certification label is attached to the vehicle's center pillar
(B-pillar). The label tells the gross weight capacity of the vehicle, called the
Gross Vehicle Weight Rating (GVWR). The GVWR includes the weight of the vehicle,
all occupants, fuel, and carg ...
Front Bumper Fascia Guide Replacement
Front Bumper Fascia Guide Replacement
Callout
Component Name
Warning: Refer to Eye Protection Warning.
Preliminary Procedure
Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement.
...
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