Remove/install heated O2 sensor

AR07.52-P-5303EL

Remove/install heated O2 sensor

19.08.2016

Engine

276 in model 218

Engine

276.9 in model 212

Shown on right CAT for model 212 with engine 276.9

1

Catalytic converter

3

Heat shield

4

Air filter housing

6

Oxygen sensor electrical connection

8

Oxygen sensor electrical connection

G3/4

Right oxygen sensor upstream of catalytic converter

G3/6

Right oxygen sensor downstream of catalytic converter

Shown on left CAT for model 212 with engine 276.9

1

Catalytic converter

2

Vacuum reservoir

3

Heat shield

7

Oxygen sensor electrical connection

9

Oxygen sensor electrical connection

G3/3

Left oxygen sensor upstream of catalytic converter

G3/5

Left oxygen sensor downstream of catalytic converter

 Danger !

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 Danger !

Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.

No parts of the body or limbs should be within the operating area when the components are moving.

AS00.00-Z-0011-01A

 

Remove/install

1

Switch off ignition and remove transmitter key

2

Remove air filter housing (4)

Engine 276.9 in model 212
Engine 276.9 in model 218

 Screw/bolt, air filter to cylinder head cover

*BA09.10-P-1001-01M

 Screw/bolt, air filter to air intake pipe support brace

*BA09.10-P-1002-01M

3

Remove engine compartment paneling

AR61.20-P-1105EW

4

Unclip electrical feed line for left oxygen sensor downstream of CAT or right oxygen sensor downstream of CAT (G3/5 or G3/6) from heat shield (3) and bracket

5

Unclip electrical connection (6 or 8) from bracket

6

Disconnect electrical connection (6 or 8)

7

Detach left oxygen sensor downstream of catalytic converter or right oxygen sensor downstream of catalytic converter (G35 or G3/6) from CAT (1)

 Engine 276.9 in model 212
Engine 276.9 in model 218
Remove left oxygen sensor downstream of catalytic converter (G3/5) or right oxygen sensor downstream of catalytic converter (G3/6).

 Installation: Coat thread with heat-resistant lubricant. Ensure correct routing of oxygen sensor lines.

 Oxygen sensor to catalytic converter

*BA14.00-P-1002-01A

Paste, hot lubrication 1 kg, DBL 6879.20

*BR00.45-Z-1005-06A

 Box wrench bit

*000589710300

8

Remove ME-SFI [ME] control unit

Engine 276.9 in model 212
Engine 276.9 in model 218

AR07.08-P-7008EL

9

Unclip electrical feed line for left oxygen sensor downstream of CAT or right oxygen sensor downstream of CAT (G3/3 or G3/4) from heat shield (3) and bracket

10

Unclip electrical feed line of left oxygen sensor upstream of CAT (G3/3) from vacuum reservoir (2)

Engine 276.9 in model 212
Engine 276.9 in model 218

11

Detach and take out vacuum reservoir (2) from ME-SFI [ME] control unit bracket

Engine 276.9 in model 212
Engine 276.9 in model 218

 Screw/bolt, vacuum reservoir to bracket

*BA43.05-P-1002-01K

12

Unclip electrical connection (7 or 9) from bracket

13

Disconnect electrical connection (7 or 9)

14

Detach left oxygen sensor upstream of CAT or right oxygen sensor upstream of CAT (G3/3 or G3/4) from CAT (1)

 Installation: Coat thread with heat-resistant lubricant. Ensure correct routing of oxygen sensor lines.

 Oxygen sensor upstream of catalytic converter

*BA14.00-P-1005-01A

Paste, hot lubrication 1 kg, DBL 6879.20

*BR00.45-Z-1005-06A

 Box wrench bit

*000589710300

15

Install in the reverse order

16

Read out fault memory using the diagnostic system and clear if necessary



AD00.00-P-2000-04A

 Danger !

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

17

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

 Air filter

Number

Designation

Engine 276.9

BA09.10-P-1001-01M

Screw/bolt, air filter to cylinder head cover

Nm

9

 Air filter

Number

Designation

Engine 276.9

BA09.10-P-1002-01M

Screw/bolt, air filter to air intake pipe support brace

Nm

9

 Oxygen sensor

Number

Designation

Engine 276

BA14.00-P-1002-01A

Oxygen sensor to catalytic converter

Nm

50

 Oxygen sensor

Number

Designation

Engine 276

BA14.00-P-1005-01A

Oxygen sensor upstream of catalytic converter

Nm

50

 Vacuum pump

Number

Designation

Engine 276 in model 172, 204, 205, 207, 212, 213, 217, 218, 221, 231, 238, 251, 253, 292

BA43.05-P-1002-01K

Screw/bolt, vacuum reservoir to bracket

Nm

9

Repair materials

Number

Designation

Order number

BR00.45-Z-1005-06A

Paste, hot lubrication 1 kg, DBL 6879.20

A 000 989 76 51