Remove/install catalytic converter

AR49.10-P-5500MRD

Remove/install catalytic converter

13.03.2018

Engine

274.9 in model 213

Engine

274.9 in model 238

1

Catalytic converter

3

Clamp

2

Bracket

5

Center exhaust system

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

 

Remove/install

1

Remove air filter housing

AR09.10-P-1150MRD

2

Release and disconnect electrical connection for oxygen sensor upstream of catalytic converter (1)

AR07.04-P-0086MRD

3

Release and disconnect electrical connection for oxygen sensor downstream of catalytic converter (1)

AR07.04-P-0085MRD

4

Unclip electrical lines for oxygen sensors from brackets

5

Detach rear bracket of air filter housing from cylinder head

 M61

*BA00.10-P-1002-04A

6

Remove center and rear lower engine compartment paneling

AR61.20-P-1105LWE

 Installation: Only install center and rear lower rear engine compartment paneling again after leak test.

7

Open clamp(3)

 Engine 274.9 in model 238Clamp to catalytic converter and front exhaust system

*BA49.10-P-1002-02I

 Engine 274.9 in model 213Clamp at catalytic converter and front exhaust system

*BA49.10-P-1002-02G

8

Detach catalytic converter (1) from ATL

 Engine 274.9 in model 213Clamp at turbocharger and catalytic converter/front exhaust line

*BA49.10-P-1001-02G

 Engine 274.9 in model 238Clamp at turbocharger and catalytic converter/front exhaust line

*BA49.10-P-1001-02I

9

Detach catalytic converter (1) from bracket (2) and remove downwards

 Engine 274.9 in model 238Screw/bolt/nut, catalytic converter to bracket

*BA49.10-P-1005-02I

 Engine 274.9 in model 213Screw/bolt/nut, catalytic converter to bracket

*BA49.10-P-1005-02G

10

Remove oxygen sensor upstream of catalytic converter (/1)

When replacing catalytic converter (1).

AR07.04-P-0086MRD

11

Remove oxygen sensor downstream of catalytic converter (1)

When replacing catalytic converter (1).

AR07.04-P-0085MRD

12

Remove combustion and corrosion residue at connecting points

13

Install in the reverse order

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

14

Carry out an engine test run and check exhaust system for leaktightness

15

Install center and lower engine compartment paneling

AR61.20-P-1105LWE

 Metric screws/bolts and nuts as per MBN 10 105, 10 143

Number

Designation

8.8

10.9

BA00.10-P-1002-04A

M61

Nm

9

13

 Exhaust system

Number

Designation

Model 213 with engine 274

BA49.10-P-1001-02G

Clamp at turbocharger and catalytic converter/front exhaust line

Nm

17

 Exhaust system

Number

Designation

Model 238 with engine 274

BA49.10-P-1001-02I

Clamp at turbocharger and catalytic converter/front exhaust line

Nm

17

 Exhaust system

Number

Designation

Model 213 with engine 274

BA49.10-P-1002-02G

Clamp at catalytic converter and front exhaust system

Nm

22

 Exhaust system

Number

Designation

Model 238 with engine 274

BA49.10-P-1002-02I

Clamp to catalytic converter and front exhaust system

Nm

22

 Exhaust system

Number

Designation

Model 213 with engine 274

BA49.10-P-1005-02G

Screw/bolt/nut, catalytic converter to bracket

Nm

25

 Exhaust system

Number

Designation

Model 238 with engine 274

BA49.10-P-1005-02I

Screw/bolt/nut, catalytic converter to bracket

Nm

25