2009 CHERY TIGGO width

Downloaded from www.Manualslib.com manuals search engine •Install the new valve guide from the top of the cylinder head as shown in the illustration.
Intake valve guide length: 45.5 mm
Exhaust valve guide length: 50.5 mm
CAUTION:
The intake and exhaust valves are different
lengths, use care when replacing the valve
guides to install the correct valve guide.
•Install the valve guide to the specified height (1) of
14 mm.
• After installing the valve guide, insert the new valve and check for smooth movement.
Valve Seats
•Before machining the valve seat, check the clear-
ance between the valve guide and the valve stem.
If the clearance is excessive, repair the valve and
valve guide if necessary before machining the valve
seat.
• Repair the width and angle of the valve seat until
the valve seat meets specified values.
• After repairing the valve seat, use valve lapping
compound to lap the valves and seats in pairs.
Valve Seat Replacement
•Cut out a portion of the original valve seat and
remove the valve seat from the cylinder head.
• Select the replacement valve seat according to the
outer diameter of the enlarged valve seat.
REPLACEMENT VALVE SEAT SIZES
Intake valve seat Enlargement size 0.30 mm
34.435 - 34.455 mm
Enlargement size 0.60 mm 34.735 - 34.755 mm
Exhaust valve seat Enlargement size 0.30 mm
31.935 - 31.955 mm
Enlargement size 0.60 mm 32.235 - 32.255 mm
CYLINDER HEAD UNIT REPAIR
LTSM020106
LTSM020103
LTSM020104
02
02–251Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Upstream Oxygen Sensor
The input from the upstream heated oxygen sensor tells the Engine Control Module (ECM) the oxygen content of the
exhaust gas. Based on this input, the ECM fine tunes the air-fuel ratio by adjusting injector pulse width.
Downstream Oxygen Sensor
The downstream heated oxygen sensor signal is used to detect catalytic convertor deterioration. As the convertor
deteriorates, the signal from the downstream sensor begins to match the upstream sensor signal except for a slight
time delay. By comparing the downstream heated oxygen sensor signal to the signal from the upstream sensor, the
ECM calculates catalytic convertor efficiency. This calculation is also used to establish the upstream O2 goal voltage
(switching point).
Removal & Installation - Upstream Oxygen Sensor
1. Disconnect the negative battery cable.
2. Disconnect the oxygen sensor electrical connector.
CAUTION:
Remove the oxygen sensor after the exhaust pipe has cooled.
3. Remove the upstream oxygen sensor (1).(Tighten: Upstream oxygen sensor to 45 N·m)
4. Installation is in the reverse order of removal.
Installation Notes:
• Before installing the oxygen sensor, coat the threads with rust inhibiting lubricant.
Removal & Installation - Downstream Oxygen Sensor
1. Disconnect the negative battery cable.
2. Disconnect the oxygen sensor electrical connector.
CAUTION:
Remove the oxygen sensor after the exhaust pipe has cooled.
3. Remove the downstream oxygen sensor (2).
(Tighten: Downstream oxygen sensor to 45 N·m)
ON-VEHICLE SERVICE
BESM030017
BESM030017
03
03–219Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Upstream Oxygen Sensor
The input from the upstream heated oxygen sensor tells the Engine Control Module (ECM) the oxygen content of the
exhaust gas. Based on this input, the ECM fine tunes the air-fuel ratio by adjusting injector pulse width.
Downstream Oxygen Sensor
The downstream heated oxygen sensor signal is used to detect catalytic convertor deterioration. As the convertor
deteriorates, the signal from the downstream sensor begins to match the upstream sensor signal except for a slight
time delay. By comparing the downstream heated oxygen sensor signal to the signal from the upstream sensor, the
ECM calculates catalytic convertor efficiency. This calculation is also used to establish the upstream O2 goal voltage
(switching point).
Removal & Installation - Upstream Oxygen Sensor
1. Disconnect the negative battery cable.
2. Disconnect the oxygen sensor electrical connector.
CAUTION:
Remove the oxygen sensor after the exhaust pipe has cooled.
3. Remove the upstream oxygen sensor (1).(Tighten: Upstream oxygen sensor to 45 N·m)
4. Installation is in the reverse order of removal.
Installation Notes:
• Before installing the oxygen sensor, coat the threads with rust inhibiting lubricant.
Removal & Installation - Downstream Oxygen Sensor
1. Disconnect the negative battery cable.
2. Disconnect the oxygen sensor electrical connector.
CAUTION:
Remove the oxygen sensor after the exhaust pipe has cooled.
3. Remove the downstream oxygen sensor (2).
(Tighten: Downstream oxygen sensor to 45 N·m)
ON-VEHICLE SERVICE
BESM030017
BESM030017
03
03–429Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine The oxygen sensors are equipped with a heating element that keeps the sensors at proper operating temperature
during all operating modes. Maintaining correct sensor temperature at all times allows the system to enter into closed
loop operation sooner. Also, it allows the system to remain in closed loop operation during periods of extended idle.
Upstream Oxygen Sensor
The input from the upstream heated oxygen sensor tells the Engine Control Module (ECM) the oxygen content of the
exhaust gas. Based on this input, the ECM fine tunes the air-fuel ratio by adjusting injector pulse width.
Downstream Oxygen Sensor
The downstream heated oxygen sensor signal is used to detect catalytic convertor deterioration. As the convertor
deteriorates, the signal from the downstream sensor begins to match the upstream sensor signal except for a slight
time delay. By comparing the downstream heated oxygen sensor signal to the signal from the upstream sensor, the
ECM calculates catalytic convertor efficiency. This calculation is also used to establish the upstream O2 goal voltage
(switching point).
Removal & Installation - Upstream Oxygen Sensor
1. Disconnect the negative battery cable.
2. Disconnect the oxygen sensor electrical connector.
CAUTION:
Remove the oxygen sensor after the exhaust pipe has cooled.
3. Remove the upstream oxygen sensor (1).(Tighten: Upstream oxygen sensor to 45 N·m)
4. Installation is in the reverse order of removal.
Installation Notes:
• Before installing the oxygen sensor, coat the threads with rust inhibiting lubricant.
ON-VEHICLE SERVICE
LTSM030004
03–534Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine The ECM will only energize the solenoid when the engine is at operating temperature, but will de-energize it during
periods of deceleration. When de-energized, no vapors are purged. The pulse-width modulated canister control valve
modulates the fuel vapor purge rate from the vapor canister and fuel tank to the engine intake manifold. 2.4L
1 - Fuel Tank2 - Canister
3 - Canister Control Valve 4 - EGR Valve5 - Air Filter Assembly 6 - Throttle Valve
GENERAL INFORMATION
LTSM030031
03–578Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine ON-VEHICLE SERVICE
Canister Control Valve 1.6L & 1.8L & 2.0L
Description
This vehicle uses a pulse-width modulated canister control valve. The canister control valve regulates the rate of
vapor flow from the vapor canister to the throttle body. The Engine Control Module (ECM) controls the frequency at
which the canister control valve operates in order to accommodate the vapor volume for each cylinder.
Operation
The canister control valve is installed near of the engine air filter. The Engine Control Module (ECM) controls the
opening and closing of the canister control valve. When the ECM relay is energized, the canister control valve
switches from closed to open.
Removal & Installation
1. Disconnect the negative battery cable.
2. Disconnect the canister control valve electrical con-nector.
3. Disconnect the lines from canister control valve (1).
4. Remove canister control valve (1) from the bracket.
5. Installation is in the reverse order of removal.
Canister Control Solenoid Valve 2.4L
Description
The canister control valve is located near of the engine air filter.
Operation
The Engine Control Module (ECM) controls the opening and closing of the canister control valve. When the ECM
relay is energized, the canister control valve switches from closed to open. The ECM uses a pulse-width modulated
canister control valve to regulates the rate of vapor flow from the vapor canister to the throttle body. The ECM con-
BESM030027
BESM030014
03–584Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine trols the frequency when the canister control valve operates in order to accommodate the vapor volume for each
cylinder.
Removal & Installation
1. Disconnect the battery negative cable.
2. Disconnect canister control solenoid valve electricalconnector.
3. Remove the canister control solenoid valve retain- ing bolt (1).
(Tighten: Canister control valve retaining bolt to 15
N·m)
4. Remove the canister control valve.
5. Installation is in the reverse order of removal.
Vapor Canister 1.6L & 1.8L & 2.0L
Description
The vapor canister is located on the left side of the core support and is filled with activated carbon granules.
Operation
The vapor canister is filled with activated carbon granules. Fuel tank vapors are vented into the canister where they
are absorbed by the activated carbon granules. The canister temporarily holds the fuel vapors until intake manifold
vacuum draws them into the cylinder chamber. The Engine Control Module (ECM) purges the canister through the
pulse-width modulated canister control valve. The ECM purges the canister at predetermined intervals and engine
conditions.
Removal & Installation
1. Raise and support the vehicle.
ON-VEHICLE SERVICE
LTSM030014
03
03–585Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2. Remove vapor canister retaining bolts (1).(Tighten: Vapor canister retaining bolt to 10 N·m)
3. Loosen the vapor canister hose.
4. Pull canister rearward to remove.
5. Installation is in the reverse order of removal.
Vapor Canister 2.4L
Description
The vapor canister is located on the left side of the core support and is filled with activated carbon granules.
Operation
The vapor canister is filled with activated carbon granules. Fuel tank vapors are vented into the canister where they
are absorbed by the activated carbon granules. The canister temporarily holds the fuel vapors until intake manifold
vacuum draws them into the cylinder chamber. The Engine Control Module (ECM) purges the canister through the
pulse-width modulated canister control valve. The ECM purges the canister at predetermined intervals and engine
conditions.
Removal & Installation
1. Raise and support the vehicle.
ON-VEHICLE SERVICE
LTSM030041
03–586Chery Automobile Co., Ltd.