Chevrolet Sonic Repair Manual: Engine Front Cover and Oil Pump Cleaning and Inspection

Chevrolet Sonic Repair Manual / Powertrain / Engine / Engine Block / Cylinder Block / Engine Front Cover and Oil Pump Cleaning and Inspection

Engine Front Cover Cleaning Procedure

Clean the engine front cover sealing surface.

Warning:

Wear safety glasses when using compressed air in order to prevent eye injury.

Caution:

To ensure proper engine lubrication, clean clogged or contaminated oil galleries in an approved solvent and with compressed air. Failure to clean oil galleries may cause engine damage.

Clean the shown oil gallery with solvent and compressed air. Blow compressed air from bore (2) to bore (1).

Engine Front Cover Visual Inspection: Inspect the engine front cover for cracks, scratches and damage.

Oil Pump Visual Inspection and Measurement

Inspect the oil pump cover and the engine front cover for flatness.
Inspect the oil pump vanes, the oil pump vane rotor, the oil pump vane rings and the oil pump slide for localized flatting.
Inspect the oil pump slide pivot pin for firm seat.

Note:

Oil pump components are installed.

Measure the oil pump axial clearances. Use a straight edge (1) and a feeler gauge.

The maximal axial clearance between engine front cover and oil pump vane rotor should be 0.1 mm (0.004 in).
The maximal axial clearance between engine front cover and oil pump vane should be 0.09 mm (0.0035 in).
The maximal axial clearance between engine front cover and oil pump vane ring should be 0.4 mm (0.016 in).
The maximal axial clearance between engine front cover and oil pump slide should be 0.08 mm (0.0031 in).
The maximal axial clearance between engine front cover and oil pump slide seal should be 0.09 mm (0.0035 in).

Measure the oil pump radial clearance. Use a feeler gauge (1). Measure the clearance between oil pump vane rotor and oil pump vane (3).
The maximal clearance should be 0.05 mm (0.002 in).
Measure the clearance between oil pump vane and oil pump slide (2).
The maximal clearance should be 0.2 mm (0.008 in).

Engine Front Cover and Oil Pump Assemble

Oil Pump Installation Note: The oil pump slide spring and pin, as well as the slide seal and slide seal spring can be ordered as single parts. All other oil pump co ...

Engine Front Cover and Oil Pump Disassemble

Engine Front Cover Disassemble Remove the intake camshaft position sensor bolt (1). Remove the intake camshaft position sensor (2) and the seal ring (3). ...

Other materials:

Relay Replacement (Within an Electrical Center)
Special Tools EL-43244 Relay Puller Pliers Removal Procedure Remove the electrical center cover. Note: Always note the orientation of the relay. If equipped with a notch style relay; observe the location of the notch on the old relay to verify the new r ...

Oil Level Indicator and Tube Installation
Install a NEW oil level indicator tube gasket. Install the oil level indicator tube (2). Caution: Refer to Fastener Caution. Install the oil level indicator tube bolt (1) and tighten to 15 Y (11 lb ft). Install the oil dipstick. ...

Camshaft Timing Chain Adjustment
Special Tools EN-952 Fixing Pin EN-953–A Fixing Tool EN-49977?E00 Fixation Sensor Discs For equivalent regional tools, refer to Special Tools. Remove the ignition coil. Refer to Ignition Coil Replacement. Remove the camshaft cover. Refer to Camshaft Cover Replacement. Remove ...

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