Remove/install front cover on cylinder head - AR01.30-P-5700SX

ENGINES 272.946/965/974/975 in MODEL 221 Front cover on left cylinder head 

ENGINES 273.922/924/961/968 in MODEL 221 Front cover on left cylinder head 

ENGINES 273.961/968 in MODEL 216 Front cover on left cylinder head 

Fig 1: Identifying Front Cover On Cylinder Head Remove/Install Components - Shown On Model 221.071

Courtesy of MERCEDES-BENZ USA

Shown on model 221.071 with code (487) Active Body Control (ABC) 

	Remove/install
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of death  when touching components on vehicles with high-voltage on-board electrical system	Do not touch components and open lines of the high-voltage on-board electrical system. Persons who are carriers of electronic implants (e.g. cardiac pacemakers), must not  carry out any work on high-voltage on-board electrical systems.	AS54.00-Z-0001-01A
1	Perform disable for the high-voltage on-board electrical system	Model 221.095/195 After completing the work, attach initial startup event log together with the disconnection log to the vehicle file.	AR54.10-P-1150SXH
	Note on the -voltage on-board electrical system		AH54.00-P-0010-01A
2	Switch off ignition
3	Remove the front and central sections of the lower engine compartment paneling	Install engine compartment paneling only after engine test run.	AR61.20-P-1105SX
4	Drain coolant at radiator		AR20.00-P-1142SX
	Notes on coolant		AH20.00-N-2080-01A
5	Remove front engine cover and left engine air intake duct	See Remove air filter housing.	AR09.10-P-1150SX
6	Remove electrical vacuum pump	Model 221.095/195	AR43.05-P-1320SXH
7	Remove high-voltage line from electrical A/C compressor and set aside	Model 221.095/195	AR83.55-P-5300SXH
			Fig 3
8	Unfasten bracket for electrical vacuum pump from timing case cover and cylinder head and lay in the electrical A/C compressor	Model 221.095/195	AR43.05-P-1320SXH
9	Remove poly-V belt tensioning device (2)	Except model 221.095/195 with a twin belt drive	AR13.20-P-0001SX
	Version of the poly-V belt altered	Model 221.095/195	BT13.20-P-1000-01SXH
10	Remove three-disk thermostat (Y110)		AR20.10-P-2460SX
11	Remove oil filter housing (4)		AR18.20-P-3471SX
12	Remove power steering expansion reservoir	Vehicles with AIRmatic except model 221.095/195	AR46.25-P-1000SX
13	Disconnect electrical connectors on Hall sensors (B6/4, B6/6)
14	Disconnect electrical connectors on solenoids (Y49/4, Y49/6)
15	Detach clamp (6)
16	Remove screw/bolts (7a) from front cover (7)		*BA01.30-P-1006-01O
17	Carefully loosen front cover (7) at lifting lugs (7b) and pull off to the front	Pay attention to fitted sleeves in area of outer threaded connections (arrows). Apply sealant to the front cover (7): ↓
		Notes on sealant path for front cover (7) on cylinder head	AH01.30-P-1000-02V
			Figure
		Loctite 5970 sealant	*BR00.45-Z-1013-01A
	Clean
18	Clean sealing surfaces on cylinder head, on cylinder head cover and on front cover (7)	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
		Loctite 7063 cleaning spray (150 ml)	*BR00.45-Z-1046-04A
19	Remove Hall sensors (B6/4, B6/6) from front cover (7)	When replacing the front cover (7)
			*BA15.10-P-1002-03E
20	Remove solenoids (Y49/4, Y49/6) from front cover (7)	When replacing the front cover (7)
			*BA15.10-P-1003-03E
21	Install in the reverse order
	Checking
	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
22	Carry out engine test run while checking engine for function and oil leaks

Fig 2: Identifying Squeeze Gun (112 589 00 25 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Set Of Protective Covers (001 589 01 91 00)

Courtesy of MERCEDES-BENZ USA