Remove/install front exhaust system

AR49.10-P-7284ORB

Remove/install front exhaust system

14.03.2018

Engine

626 in model 205

with code U77 (Diesel Emission control BLUETEC (SCR))

1

Front exhaust system

2

Screw/bolts

3

Clamp

4

Exhaust flap

5

Clamp

 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 self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

 

Remove/install

1

Remove center and rear engine compartment paneling downwards

AR61.20-P-1105LW

2

Release and disconnect electrical connection at exhaust flap (4)

3

Release electrical wiring harness at exhaust flap (4)

4

Remove NOx sensor at front exhaust system (1)

Engine 626 in model 205
with code U77 (Diesel Emission control BLUETEC (SCR))

AR14.40-P-2059OLP

5

Open clamp(3)

 Installation: Replace clamp (3) and seal.

 Clamp, front exhaust system to catalytic converter

*BA49.10-P-1003-02B

6

Open clamp (5)

 Installation: Replace the clamp (5).

 Clamp, rear exhaust system to front exhaust system

*BA49.10-P-1004-02B

7

Remove screw/bolts (2)

 Bolt/nut, front exhaust system to bracket

*BA49.10-P-1006-02B

8

Remove front exhaust system (1) downwards

9

Remove combustion and corrosion residue at connecting points

10

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

11

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

 Exhaust system

Number

Designation

Engine 626

BA49.10-P-1003-02B

Clamp, front exhaust system to catalytic converter

Nm

20

 Exhaust system

Number

Designation

Engine 626

BA49.10-P-1004-02B

Clamp, rear exhaust system to front exhaust system

Nm

20

 Exhaust system

Number

Designation

Engine 626

BA49.10-P-1006-02B

Bolt/nut, front exhaust system to bracket

Nm

20