Chevrolet Sonic Repair Manual: Engine Block Cleaning and Inspection
Special Tools
EN-8087 Cylinder Gauge
For equivalent regional tools, refer to Special Tools.
- Clean the sealing material from the gasket mating surfaces (2).
- Clean the engine block (1) and lower crankcase in a cleaning tank with solvent appropriate for aluminum. Refer to Adhesives, Fluids, Lubricants, and Sealers for the recommended solvent.
- Flush the engine block with clean water or steam.
- Clean the oil passages.
- Clean the blind holes.
- Spray the cylinder bores and the machined surfaces with engine oil.
- Inspect the threaded holes. Clean the threaded holes with a rifle brush. If necessary, drill out the holes and install thread inserts. Refer to Thread Inserts.
- Inspect the engine block for sag in length and width on the sealing surfaces.
- Inspect the engine block for distortion along the diagonals.
If the deck surface is out of specification, replace the block. Do not machine the block.
- Clean the sealing material from the gasket mating surfaces (1) on the lower crankcase oil pan side.
- Inspect the crankshaft main bearing bores. Use the EN-8087 gauge (1) to measure the bearing bore concentricity and alignment.
- Replace the engine block and bed plate if the crankshaft bearing bores are out of specification.
- Inspect the cylinder bores using the EN-8087 gauge (1). Inspect for the following items:
Note:
Do not attempt to machine the lower crankcase to engine block surfaces.
- Wear
- Taper
- Runout
- Ridging
Engine Block Disassemble
Remove the cylinder head locating (1, 2).
Remove the oil pressure switch (1).
Remove the knock sensor bolt (2) and the knock sensor (1).
Clea ...
Cylinder Block
...
Other materials:
Sunroof
On vehicles with this feature, the sunroof only operates when the ignition is
turned to ON/RUN or Retained Accessory Power (RAP) is active.
Open/Close: To open the sunroof, press and hold the rear of the switch. To close
the sunroof, press and hold the front of the switch.
Vent: Press and ho ...
SIR Service Precautions
General Service Instructions
Warning: When performing service on or near the SIR components
or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling
and Enabling . Failure to observe the correct procedure could cause deployment
of the SIR components, person ...
Timing Belt Idler Pulley Installation
Special Tools
EN-45059 Angle Meter
For equivalent regional tools, refer to Special Tools.
Caution: Refer to Fastener Caution.
Caution: Refer to Torque-to-Yield Fastener Caution.
Re-cut the timing belt idler pulley thread.
Install the timing belt idler pulley̴ ...
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