Remove/install catalytic converter · ar4910p5500mcf · Mercedes-Benz WIS

AR49.10-P-5500MCF

Remove/install catalytic converter

13.7.10

ENGINES 132.930 in MODEL 451.3 /4 as of 31.8.10

P49.10-2922-09

1 Catalytic converter

2 Electrical line

3 Bracket

4 Bolts

5 Bolts

6 Clamp

7 Electrical line

G3/1x1 O2 sensor downstream of CAT [KAT] connector

G3/2 O2 sensor upstream of CAT [KAT]

G3/2x1 O2 sensor upstream of of CAT [KAT] connector

8 Clamp

9 Clamp

10 Connector

11 Vacuum line

12 Vacuum unit

13 Air intake pipe

14 Bolts

15 Heat shield

P49.10-2923-11

1 Catalytic converter

G3/1 O2 sensor downstream of CAT [KAT]

G3/2 O2 sensor upstream of CAT [KAT]

	Removing
1	Remove interior flap above engine		AR88.40-P-1100-03MCC
2	Detach connector of O2 sensor upstream of CAT [KAT] (G3/2x1)
3	Remove rear muffler		AR49.10-P-4823MCF
4	Remove bolts (4, 5) and bracket (3)
5	Disconnect O2 sensor downstream of CAT [KAT] connector (G3/1x1)
6	Unclip electrical line (7) from clips (6, 8, 9)	 Observe routing of electrical line (7).
7	Guide connector plug (10) on O2 sensor downstream of CAT [KAT] (G3/1x1) between vacuum line (11), air intake pipe (13) and vacuum unit (12)	 Observe routing of electrical line (7).
8	Unscrew bolts (14) and remove catalytic converter (1)
9	Remove O2 sensor upstream of CAT [KAT] (G3/2) and O2 sensor downstream of CAT [KAT] (G3/1) from catalytic converter (1)	When replacing catalytic converter (1).
		 Use a suitable 22 mm socket wrench.
	Install
10	Screw O2 sensor upstream of CAT [KAT] (G3/2) and O2 sensor downstream of CAT [KAT] (G3/1) into catalytic converter (1)	When replacing catalytic converter (1).
		 Use a suitable 22 mm socket wrench. Coat thread on O2 sensor downstream of CAT [KAT] (G3/1) and O2 sensor upstream of CAT [KAT] (G3/2) with paste.
			*BA14.00-P-1002-01B
			*BA14.00-P-1003-01B
		Paste	*BR00.45-Z-1005-06A
11	Screw on catalytic converter (1) with bolts (14) finger-tight
12	Guide connector plug (10) O2 sensor downstream of CAT [KAT] (G3/1x1) between vacuum line (12), air intake pipe (13) and vacuum unit (11)	 Observe routing of electrical line (7).
13	Connect O2 sensor downstream of CAT [KAT] (G3/1x1) connector
14	Clip electrical line (7) into clips (6, 8, 9)	 Ensure that electrical line (7) is routed so that it cannot chafe.
15	Position bracket (3) and tighten bolts (4, 5) finger-tight
16	Align catalytic converter (1) and tighten bolts (4, 5, 14)
17	Lay electrical line (2) of O2 sensor upstream of CAT [KAT] (G3/2) down on heat shield (15)
18	Install rear muffler		AR49.10-P-4823MCF
19	Contact connector for O2 sensor upstream of CAT [KAT] (G3/2x1)
20	Install interior flap above engine		AR88.40-P-1100-03MCC
 Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
21	Test run engine and check exhaust system for leaks

O2 sensor

Number	Designation		Engine 132.9


BA14.00-P-1002-01B	O2 sensor upstream of CAT [KAT] to catalytic converter	Nm	50
BA14.00-P-1003-01B	O2 sensor downstream of CAT [KAT] to catalytic converter	Nm	40

Repair materials

Number	Designation	Order number
BR00.45-Z-1005-06A	Paste, hot lubrication 1 kg, DB supply specification 6879.20	A 000 989 76 51

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