Remove and installing catalytic converter or front exhaust system - AR49.10-P-5531EA

ENGINE 119.985 

Fig 1: Identifying Catalytic Converter Or Front Exhaust System Components

	Remove/install
1	Remove/install lower engine compartment covering
2	Remove/install exhaust system as from flange connection
3	Disconnect O2 sensor connectors (G3/3x1, G3/4x1)
4	Unscrew bolts (1) on catalytic converter/exhaust manifold flange connection	If bolts are sluggish, or thread damaged: ↓
		Replace the rivet nuts in the exhaust manifold.	AR49.10-P-5531-01DA
			*BA14.10-P-1002-01B
5	Unscrew nuts (6a) and remove three-way catalytic converter (2)
6	Unscrew O2 sensor (G3/3, G3/4)	Installation:  Coat thread on oxygen sensor with heat-resistant lubricant	*BR00.45-Z-1005-06A
			*BA14.00-P-1001-01A
			Fig 2
7	Install in the reverse order

O2 sensor 

Number	Designation		Engine 104, 111, 119, 120, 137, engine 166 in model 168
BA14.00-P-1001-01A	O2 sensor at exhaust pipe/ exhaust manifold	Nm	55

Exhaust manifold 

Number	Designation		Engine 119
BA14.10-P-1002-01B	Flange connection, exhaust manifold and front exhaust pipes	Nm	20

Repair materials

Number	Designation	Order number
BR00.45-Z-1005-06A	Paste	A 000 989 76 51

Fig 2: Identifying Box Wrench Bit, Delco R4 And A6 (000 589 71 03 00)

Fig 3: Identifying Cocking Bolt (103 589 01 39 00)