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Removing and installing catalytic converter or front exhaust system - AR49.10-P-5531AV

ENGINES 112.940, 113.943 /984 in MODEL 208 

ENGINES 112.910 /920, 113.944 in MODEL 202 

Shown on engine 112.940 

Fig 1: Identifying Catalytic Converter Or Front Exhaust System Remove/Install Components -Shown On Engine 112.940
G04713940
REMOVINGINSTALLING Remove/install     
1 Disconnect plug connection of left and right O2 sensors upstream of TWC (G3/3x1, G3/4x1)   AR14.00-P-5303A
2 Unscrew bolts (1) at flange connection between front exhaust system / exhaust manifold IMPORTANT Loosen flange connection (6) or Disconnect if necessary.
IMPORTANT If bolts are stiff, or thread damaged: ↓
Replace the rivet nuts in the exhaust manifold.		 AR49.10-P-5531-01DA 
    TORQUE SPECIFICATION *BA14.10-P-1002-01B 
    TORQUE SPECIFICATION *BA49.10-P-1002-01A 
3 Unscrew bolts (3) at flange connection between front exhaust system / rear exhaust system IMPORTANTInstallation: 
Replace nuts and bolts (3) if necessary.		  
4 Unscrew nuts (2) on bracket IMPORTANTInstallation:  Install new nuts.  
5 Remove front exhaust system with three-way catalytic converter (4) IMPORTANTRemoval/installation: 
Push rear exhaust system back slightly, or disconnect rear exhaust system if necessary.
NOTES Ensure that the heat shields of the exhaust system are not damaged when removing and installing the three-way catalytic converter (4).
INSPECT Check seal ring (5) for damage and replace if necessary.
Use emery cloth to remove combustion and corrosion residues at connection points.		  
    TORQUE SPECIFICATION *BA49.10-P-1002-01A 
REFER TO FORMS Notes on disposing of catalytic converters Vehicles with three-way catalytic converter code 620a OS49.10-P-1000-01A 
6 Install in the reverse order IMPORTANT Install catalytic converter free of stress.  
TORQUE SPECIFICATION EXHAUST MANIFOLD

Number Designation Engine 112 except 112.951/976 Engines 113.940/941/942/943/944/945/946/948/960/961/962/963/964/965/966/967/968/969/971/980/981/982/984/986/992/993/995
BA14.10-P-1001-01B Nut on exhaust manifold Nm 16 16
BA14.10-P-1002-01B Flange connection, exhaust manifold and front exhaust pipes Nm 20 20
TORQUE SPECIFICATION EXHAUST SYSTEM

Number Designation Engines 112, 113 in model 202 Engines 112, 113 in model 208
BA49.10-P-1002-01A Bolt, flange connection to exhaust pipe Nm 20 20
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