Chevrolet New Sail (2010). Manual — part 6

21

Chevrolet 2010 New Sail New Technical Training

- Learner's Manual

2.4 Engine Maintenance and Service

2.4.1 Timing Calibration

„ 1.2L LMU

1. Align the mark on the camshaft sprocket with the mark on the timing chain, and then mount the timing

chain.

2. Align the mark on the crankshaft sprocket with the mark on the timing chain.

3. Push the timing chain tensioner rod, and fix it through mounting the tensioner pin

（EN-49073）.

4. Assemble the timing chain guide plate.

Fastening: fasten the fixed bolts of the timing chain guide plate to 12 N.m

（106 in.lbf）

5. Assemble the timing chain main guide plate.

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Fastening: fasten the fixed bolts of the timing chain rod to 15 N.m

（11 foot pound）.

6. Assemble the timing chain tensioner.

Fastening: fasten the fixed bolts of the timing chain tensioner to 12 N.m

（106 in.lbf）.

„ 1.4L LCU

1. Align the mark on the camshaft sprocket with the mark on the timing chain, and then mount the timing

chain.

2. Align the mark on the crankshaft sprocket with the mark on the timing chain.

3. Push the timing chain tensioner rod, and fix it through mounting the tensioner pin

（EN-49073）.

4. Assemble the timing chain guide plate.

Fastening: fasten the fixed bolts of the timing chain guide plate to 10 N.m

（7.4 foot pound）.

5. Assemble the timing chain main guide plate.

Fastening: fasten the fixed bolts of the timing chain rod to 10 N.m

（7.4 foot pound）.

6. Assemble the timing chain tensioner.

Fastening: fasten the fixed bolts of the timing chain tensioner to 12 N.m

（8.8 foot pound）.

2.4.2 Valve Clearance Adjustment

（1.2&1.4）

23

Chevrolet 2010 New Sail New Technical Training

- Learner's Manual

„ Valve Clearance Adjustment

Caution: Valve clearance test should be carried out under normal coolant temperature

（15- 25°C）, and the valve

clearance should be measured when cylinder head and cylinder block are assembled together.

1. Dismount the camshaft cover, and please refer to "replacement of camshaft cover".

2. Turn the crank belt pulley according to the diagram and adjust the belt pulley groove to the "0" point.

This is in order to adjust #1 cylinder to the top dead center.

3. Check the camshaft sprocket and the timing chain, and align the timing marks respectively.

4. Measure the valve clearance of each point according to the diagram.

5. Turn the crank belt pulley to 360°, and adjust the belt pulley groove to the "0" point.

6. Measure the valve clearance for each point according to the diagram.

- Intake valve specifications: 0.075-0.125 mm（coolant temperature: 20°C）

- Exhaust valve specifications: 0.245-0.305 mm（coolant temperature: 20°C）

7. If measured values are beyond the specifications, then valve tappets need to be replaced.

2.5 Engine Management System

2.5.1 ECM Input

z Vehicle Speed Sensor

（VSS）

z Crankshaft Position

（CKP） Sensor

z Throttle Position Sensor

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z Engine Coolant Temperature

（ECT） Sensor

z Camshaft Position

（CMP） Sensor

z Manifold Absolute Pressure

（MAP） Sensor

2.5.2 ECM Output

z Idle Air Control

（IAC） Motor

z Evaporative Emission

（EVAP） Canister Purge Solenoid Valve Controlled by Control Modules

z Air Conditioning Relay

z Cooling Fan Relay

z Vehicle Speed Sensor

（VSS） Output

z Malfunction Indicator Lamp

（MIL） Control

2.5.3 EGR Valve

1. Position Sensor

2. Coil Assembly

3. Base

4. Pivot

5. Exhaust Entry

6. Armature

2.5.4 Programming and Setting of Engine Control Module

The following servicing programs need to be programmed or set to complete repair.

The replacement of the engine control module: if the engine control module

（ECM） is replaced, then the

following programs must be executed: