Remove/install timing case cover

AR01.40-P-8000MRM

Remove/install timing case cover

12.03.2020

Engine

274.9 in model 167

Modification notes

12.02.2020

Screw, bleed line of crankcase ventilation system to crankcase/timing case cover

Engine 274

BA01.20-P-1005-01R

1

Bolts

2

Timing case cover

3

Oil pan

4

Cap

5

Bolts

6

Screw

7

Electrical connector

8

Electrical connector

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

 Caution

Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil

Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.

AS18.00-Z-0001-01A

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

Topical note

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

AH00.00-Z-0300-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A



Remove

1

Remove voltage of high-voltage on-board electrical system.

AR47.70-P-1000MEH

2

Deactivate easy entry and exit feature.

Engine 274.9 in model 167
with code 275 (Memory Package (driver's seat, steering column and mirror))

3

Move front wheels to straight-ahead position and fix steering wheel in place with holding device.


Do not turn the steering wheel after the steering coupling has been disconnected.
Otherwise the clock spring contact will be destroyed.

 Retainer device

*129589012100

4

Disconnect ground line from battery.

AR54.10-P-0003ME

5

Secure vehicle on vehicle lift.

AR00.60-P-1006A

6

Drain off coolant.

AR20.00-P-1142MRM

7

Remove air filter housing.

AR09.10-P-1150MRM

8

Remove heat shield of exhaust gas turbocharger.

AR09.40-P-6036MRM

9

Remove charge air pipe between charge air cooler and exhaust gas turbocharger.

10

Remove vibration damper.

AR03.30-P-1800MRM

11

Remove screw (6).

12

Remove electric refrigerant compressor from engine, place to one side with refrigerant lines connected, and secure against falling down.

AR83.55-P-5311MRM

13

Remove oil pan (3).

AR01.45-P-7500MRM

14

Remove electric vacuum pump from engine, place to one side with lines connected, and secure against falling down.

AR43.05-P-0001MRM

15

Remove coolant hose between electric coolant pump and coolant thermostat.

 Hose clamp pliers

*454589003700

16

Remove electric coolant pump.

AR20.10-P-1281MRM

17

Remove bleed line between air intake pipe and crankcase from timing case cover (2).

18

Remove coolant pipe.

AR20.20-P-7450MRM

19

Remove boost pressure control pressure transducer.

AR07.17-P-7004MRM

20

Remove holder of boost pressure control pressure transducer.

21

Release and disconnect electrical connector (7) and unclip electric line at timing case cover (2).

22

Push electrical connector (8) downward out of timing case cover (2).

23

Remove bolts (5).

24

Remove screws (1) in reverse order of tightening procedure.

AR01.40-P-8000-01MR

25

Remove timing case cover (2).


Do not hammer in any tool between timing case cover (2) and crankcase to remove.
The sealing surfaces can be damaged otherwise.



Clean

26

Clean sealing surfaces.

AR01.00-P-0050-01A


Do not use any sharp-edged tools or abrasive paper.
The sealing surfaces can be damaged otherwise.

Loctite 7200

*BR00.45-Z-1038-04A

Loctite 7063 (400 ml) cleaning spray

*BR00.45-Z-1046-04A



Check

27

Check sealing surface on timing case cover (2) and on crankcase for damage.

If there is a problem,



Replace corresponding component.



Install

28

Apply sealant to timing case cover (2).

Notes on application of flange sealants to seal major assemblies

AH00.00-P-0500-01MNE

Notes on sealant path for timing case cover

AH01.40-P-1000-01MR

Sealant, Loctite 5970, 50 ml

*BR00.45-Z-1013-01A

 Application gun

*112589002500

29

Position timing case cover (2) on crankcase.

30

Screw in screws (1) according to tightening procedure.

AR01.40-P-8000-01MR

 Bolt, timing case cover to crankcase

*BA01.40-P-1001-01K

31

Install new cap (4).

When replacing timing case cover(2).

32

Install new front radial shaft sealing ring for crankshaft.

AR03.20-P-3002MRM

33

Screw in screws (5).

 Bolt, cylinder head to timing case cover

*BA01.30-P-1002-01Y

34

Pull electrical connector (8) with new sealing ring into timing case cover (2).

35

Connect electrical connector (7) and clip electric line into timing case cover (2).

36

Install holder of boost pressure control pressure transducer.

 Screw, boost pressure control pressure transducer holder to cylinder head/timing case cover

*BA09.40-P-1017-01U

37

Install boost pressure control pressure transducer.

AR07.17-P-7004MRM

38

Install coolant pipe.

AR20.20-P-7450MRM

39

Install bleed line between air intake pipe and crankcase on timing case cover (2).

 Screw, bleed line of crankcase ventilation system to crankcase/timing case cover

*BA01.20-P-1005-01R

40

Install electric coolant pump.

AR20.10-P-1281MRM

41

Install coolant hose between electric coolant pump and coolant thermostat.

 Hose clamp pliers

*454589003700

42

Attach electric vacuum pump to engine.

AR43.05-P-0001MRM

43

Install oil pan (3).

AR01.45-P-7500MRM

44

Attach electric refrigerant compressor to engine.

AR83.55-P-5311MRM

45

Screw in screw(6).

 Bolt, timing case cover to crankcase

*BA01.40-P-1001-01K

46

Install vibration damper.

AR03.30-P-1800MRM

47

Install charge air pipe between charge air cooler and exhaust gas turbocharger.

 Charge air pipe/charge air cooling

*BA09.41-P-1001-01U

48

Install heat shield of exhaust gas turbocharger.

AR09.40-P-6036MRM

49

Install air filter housing.

AR09.10-P-1150MRM

 Only install upper engine cover after the leak test.

50

Fill in coolant.

AR20.00-P-1142MRM

 Only install lower engine compartment paneling after leak test.

51

Remove locking clip from vehicle on vehicle lift.

AR00.60-P-1006A

52

Remove holding device of steering wheel.

53

Connect ground line to the battery.

AR54.10-P-0003ME

54

Put the high-voltage on-board electrical system into operation.

AR47.70-P-1000MEH

55

Check engine oil level in the multifunction display and correct if necessary.



AP18.00-P-1812SKI

 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

56

Perform engine test run. While doing so, check engine for proper operation and leak tightness.

57

Install lower engine compartment lining.

AR61.20-P-1105ME

58

Install upper engine cover.



AP01.10-P-2405-01O

 Crankcase ventilation system, cylinder head cover, camshaft housing

Number

Designation

Engine 274

BA01.20-P-1005-01R

Screw, bleed line of crankcase ventilation system to crankcase/timing case cover

Nm

8

 Cylinder head

Number

Designation

Engine 274

BA01.30-P-1002-01Y

Bolt, cylinder head to timing case cover

M8

Nm

20

 Crankcase, timing case cover, end cover

Number

Designation

Engine 274

BA01.40-P-1001-01K

Bolt, timing case cover to crankcase

M6

Nm

9

M8

Stage 1

Nm

-

Stage 2

Nm

-

M10

Nm

58

 Turbocharger

Number

Designation

Engine 274

BA09.40-P-1017-01U

Screw, boost pressure control pressure transducer holder to cylinder head/timing case cover

Nm

8

 Charge air pipe/charge air cooling

Number

Designation

Engine 274

BA09.41-P-1001-01U

Charge air pipe/charge air cooling

Nm

9

Repair materials

Number

Designation

Order number

BR00.45-Z-1013-01A

Sealant, Loctite 5970, 50 ml

A 003 989 98 20 10

BR00.45-Z-1038-04A

Loctite 7200

Henkel AG & Co. KGaA
http://www.loctite.de

BR00.45-Z-1046-04A

Loctite 7063 (400 ml) cleaning spray

A 001 986 71 71 09