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Replace rear crankshaft radial sealing ring - AR03.20-P-3063MM

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ENGINES 157, 278 in MODEL 216 

ENGINES 157, 276, 278 in MODEL 221 

Shown on engine 273.961 

Fig 1: Replacing Rear Crankshaft Radial Sealing Ring
G10108158Courtesy of MERCEDES-BENZ USA
MODIFICATION NOTES

16.3.11 Special tool 271 589 00 43 00 replaced by special tool 273 589 00 43 00 Engine 276 AR03.20-P-3063-01MMA
Engine 157, 278 AR03.20-P-3063-01MMB
REMOVINGINSTALLING Remove/install     
1 Remove driven plate   AR03.30-P-8001MM 
CLEAN Clean     
2 Clean crankcase (2) and oil pan (3) in area of the end cover (4) Cleaner from package *BR00.45-Z-1028-04A 
3 Remove bolts (4a, 4b) TORQUE SPECIFICATION *BA01.40-P-1002-01K 
TORQUE SPECIFICATION *BA01.45-P-1001-01E 
4 Pry off end cover (4) with crankshaft radial sealing ring (5) from crankcase (2) NOTES Do not  hit tool for prying off between end cover (4) and crankcase (2); the sealing surface will be damaged.
IMPORTANT Fit tool for prying off onto side recess clearances of end cover (4). If required heat up sealant with hot air gun.		  
5 Remove end cover (4) IMPORTANT Notes on sealant application and on the correct installation position of lips of crankshaft radial sealing ring (5) must be strictly observed:↓
Install rear crankshaft radial seal (5)		  
Engine 276 AR03.20-P-3063-01MMA
Engine 157, 278 AR03.20-P-3063-01MMB
TORQUE SPECIFICATION *BA01.40-P-1002-01K 
TORQUE SPECIFICATION *BA01.45-P-1001-01E 
SPECIAL TOOL Fig 2
Loctite 5970 sealant *BR00.45-Z-1013-01A 
Cleaner from package *BR00.45-Z-1028-04A 
Loctite 7200 *BR00.45-Z-1038-04A 
CLEAN Clean     
6 Clean sealing surfaces for end cover (4) NOTES Do not use any sharp-edged tools or abrasive paper as this will damage the sealing surfaces. AR01.00-P-0050-01A
Loctite 7200 *BR00.45-Z-1038-04A 
Cleaning spray, Loctite 7063 (150 ml) *BR00.45-Z-1046-04A 
7 Install in the reverse order    
DANGER Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.		 AS00.00-Z-0005-01A
8 Carry out an engine test run and check engine for leaks
CRANKCASE, TIMING CASE COVER, END COVER

Number Designation Engine 157 Engine 276 Engine 278
BA01.40-P-1002-01K Bolt, rear end cover to crankcase Nm 9 9 9
OIL PAN

Number Designation Engine 157 Engine 276 Engine 278
BA01.45-P-1001-01E Bolt, oil pan to cylinder crankcase/timing case cover/rear end cover M6 Nm 9 9 9
Fig 2: Identifying Insertion Tool (273 589 00 43 00)
G10094401Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1013-01A Loctite 5970 sealant A 003 989 98 20
BR00.45-Z-1028-04A Cleaner from package Adolf Wurth GmbH & Co. KG
BR00.45-Z-1038-04A Loctite 7200 Henkel Loctite Deutschland GmbH
BR00.45-Z-1046-04A Loctite 7063 cleaning spray (150 ml) A 001 986 71 71 10
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