Remove/install timing case cover

AR01.40-P-8000MRT

Remove/install timing case cover

18.02.2020

Engine

256.9 in model 222

1

Timing case cover

3

Bolts

5

Oil pan

2

Crankcase

4

Bolts

6

Radial shaft sealing ring

 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

 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

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A



Remove

1

Remove the transmission

Engine 256.9 in model 222
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR27.10-P-0500MRT

Engine 256.9 in model 222
except code M005 (Vehicles with 4MATIC/all-wheel drive)

AR27.10-P-0500MRA

2

Remove front axle transmission

Engine 256.9 in model 222
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR33.30-P-0525LF

3

Drain engine oil and catch in a suitable container



AP18.00-P-0101MRT

4

Remove starter-alternator

AR15.40-P-0003MRT

5

Remove cylinder head

AR01.30-P-5800MRT

6

Remove bolts (3, 4)

Bolt plan for timing case cover

AR01.40-P-8000-01MTR

 Pay attention to different lengths of screws.

7

Remove timing case cover (1)


Do not drive in any tools between the timing case cover (1) and crankcase (2) to remove them.
Sealing surfaces will otherwise be damaged.

 Mounting wedge

*110589035900

8

Remove radial shaft sealing ring (6)

AR03.20-P-3003MRT



Clean

9

Clean sealing surfaces on the crankcase (2), oil pan (5), and timing case cover (1)

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

Loctite 7200

*BR00.45-Z-1038-04A

Loctite 7063 (400 ml) cleaning spray

*BR00.45-Z-1046-04A



Install

10

Install timing case cover (1)

Notes on sealant path for timing case cover

AH01.40-P-1000-01MRT

 The pilot bushings of the crankcase (2) must engage in the cutouts in the timing case cover (1).
Apply sealant to the sealing surface of the timing case cover (1). Observe notes on sealant path.

Sealant, Loctite 5970, 50 ml

*BR00.45-Z-1013-01A

 Application gun

*112589002500

11

Tighten screws (3, 4)

Bolt plan for timing case cover

AR01.40-P-8000-01MTR

 Pay attention to different lengths of screws.
Observe tightening sequence.

 Screw/bolt, oil pan upper part to timing case

*BA01.45-P-1004-01MRT

 Bolt, timing case to crankcase

*BA01.40-P-1002-03MRT

12

Install new radial shaft sealing ring (6)

AR03.20-P-3003MRT

13

Install cylinder head

AR01.30-P-5800MRT

14

Install starter alternator

AR15.40-P-0003MRT

15

Install front axle transmission

Engine 256.9 in model 222
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR33.30-P-0525LF

16

Install transmission

Engine 256.9 in model 222
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR27.10-P-0500MRT

Engine 256.9 in model 222
except code M005 (Vehicles with 4MATIC/all-wheel drive)

AR27.10-P-0500MRA

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

17

Pour in engine oil



AP18.00-P-0101MRT

 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

18

Perform an engine test run and check engine for proper operation and leaktightness

19

Install center and lower engine compartment paneling

AR61.20-P-1105LF

 Crankcase, timing case, end cover

Number

Designation

Engine 256.9

BA01.40-P-1002-03MRT

Bolt, timing case to crankcase

Stage 1

Nm

8

Stage 2

Nm

20

 Oil pan, oil level sensor

Number

Designation

Engine 256.9

BA01.45-P-1004-01MRT

Screw/bolt, oil pan upper part to timing case

M8

Nm

20

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