Chery Tiggo 5 (T21). Manual - part 148

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c. Remove 4 coupling nuts (arrow), disconnect the 

connection between exhaust manifold assembly and 
precatalytic converter assembly, and take off the 
gasket in the connecting part.



(Tightening torque: 50 ± 5 N·m)

d. Take off and disconnect the downstream oxygen 

sensor connector (arrow) from the bracket.

e. Remove 2 coupling nuts (arrow) between precatalytic 

converter upper body assembly and precatalytic 
converter lower body assembly.



(Tightening torque: 50 ± 5 N·m)

f. Remove 2 left coupling bolts (1) and right coupling 

bolt (2) between precatalytic converter assembly 
bracket and cylinder block.



(Tightening torque for left coupling bolt: 23 ± 2 N·m)



(Tightening torque for right coupling bolt: 50 ± 5 N·m)

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g. Remove the precatalytic converter upper body assembly.
h. Remove 2 coupling nuts (1) between precatalytic 

converter lower body assembly and main catalytic 
converter assembly.



(Tightening torque: 50 ± 5 N·m)

i. Remove the diamond shaped hanger block (arrow) 

between precatalytic converter lower body assembly 
and body hook.

j. Remove the precatalytic converter lower body assembly.

5. Remove the upstream oxygen sensor (1) and downstream 

oxygen sensor (2) from the precatalytic converter upper 
body assembly.



(Tightening torque: 40 - 60 N·m)

Installation

Installation is in the reverse order of removal.

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CAUTION

 If gasket is damaged, replace it, and remove foreign matter on joints and threads.
 If there are any cracks or leakage in precatalytic converter assembly, replace as necessary.
 Check for exhaust gas leaks. If gas leaks, tighten defective area to prevent leaking. Replace damaged 

parts as necessary.

 Check that there is no exhaust gas leakage in upstream oxygen sensor connection.
 Check that there is no exhaust gas leakage in downstream oxygen sensor connection.

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Main Catalytic Converter Assembly

Removal

1. Turn off all the electrical equipment and ignition switch.
2. Disconnect the negative battery cable.
3. Raise the vehicle to a proper height.
4. Remove the main catalytic converter assembly.

a. Remove 2 coupling nuts (arrow), disconnect the 

connection between main catalytic converter assembly 
and precatalytic converter lower body assembly, and 
take off the gasket in the connecting part.



(Tightening torque: 50 ± 5 N·m)

b. Remove 2 coupling nuts (arrow), disconnect the 

connection between main catalytic converter assembly 
and center pipe assembly, and take off the gasket in 
the connecting part.



(Tightening torque: 50 ± 5 N·m)

c. Remove the main catalytic converter assembly.

WARNING

 The temperature of exhaust system is very high when engine is running. Before removal, make sure that 

engine has stopped running, otherwise, there is a risk of scald injury.

CAUTION

 Be sure to wear necessary safety equipment to prevent accidents when repairing.
 Try to prevent body paint surface from being scratched during removal and installation. 

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Installation

Installation is in the reverse order of removal.

CAUTION

 If gasket is damaged, replace it, and remove foreign matter on joints and threads.
 If there are any cracks or leakage in main catalytic converter assembly, replace as necessary. 
 Keep sufficient distance between main catalytic converter assembly and body during installation.
 Check for exhaust gas leaks. If gas leaks, tighten defective area to prevent leaking. Replace damaged 

parts as necessary.