Remove/install timing case cover - AR01.40-P-8000SXI

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ENGINE 642 in MODEL 207, 212, 218, 221

MODIFICATION NOTES

9.4.10

Value changed: screw/bolt, timing case cover to cylinder crankcase

BA01.40-P-1004-01S

Shown on engine 642.9

Fig 1: Timing Case Cover Remove/Install Components - Shown On Engine 642.9 (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Timing Case Cover Remove/Install Components - Shown On Engine 642.9 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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 vehicle manufacturer.	AS00.00-Z-0010-01A
1	Remove engine cover	Model 207, 212, 218
		Remove/install engine cover ENGINE 642 in MODEL 221	AR01.10-P-2405SXI
		Ensure correct seating of the engine cover.
2	Remove impact plate if necessary	The impact plate is installed in front of the belt drive.
3	Remove mixing chamber	ENGINE 642 in MODEL 207, 212, 218, 221 Remove/install mixing chamber	AR09.20-P-1320OGE
3	Remove mixing chamber	Remove/install mixing chamber ENGINE 642 in MODEL 221	AR09.20-P-1320SXI
4	Remove poly-V belt	ENGINE 642 in MODEL 207, 212, 218, 221 Remove/install belt drive components	AR13.20-P-0001OGE
4	Remove poly-V belt	Remove/install poly-V belt ENGINE 642 in MODEL 221	AR13.22-P-1202SXI
5	Remove tensioner pulley (1)	ENGINE 642 in MODEL 207, 212, 218, 221 Remove/install belt drive components	AR13.20-P-0001OGE
5	Remove tensioner pulley (1)	Remove/install poly-V belt tensioning device ENGINE 642 in MODEL 221	AR13.25-P-3200SXI
6	Remove lower guide pulley (2)
7	Remove coolant pump switchover valve	ENGINE 642 in MODEL 207, 212, 218, 221 Remove/install coolant pump switchover valve	AR20.10-P-3000SXI
8	Remove bracket for the coolant pump switchover valve	Model 212, 218 with switchable coolant pump
9	Set engine to top dead center (OT)	The engine must stand at TDC. The timing case cover (5) cannot be disassembled otherwise.
10	Remove belt pulley (3)	ENGINE 642 in MODEL 207, 212, 218, 221 Remove/install belt pulley/vibration damper	AR03.30-P-1600SXI
11	Remove oil level switch	ENGINE 642 in MODEL 207, 212, 218, 221 Remove/install oil level switch	AR18.40-P-4115SXI
12	Remove screw/bolts (4) and screw/bolts (7, arrows) from the timing case cover (5)	For vehicles with aluminum screw/bolts installed at the works, these must be replaced by steel screw/bolts.
		Screw/bolt, timing case cover to cylinder crankcase	*BA01.40-P-1004-01S
13	Remove timing case cover (5)
	Notes on sealant path for timing case cover		AH01.40-P-1000-01SXI
		First apply sealant, then place on the timing case cover (5) and tighten the lower screw/bolts (7, arrows). Loosen lower screw/bolts (7, arrows) again and insert centering sleeves then tighten all screw/bolts (4).
		Loctite 5970 sealant	*BR00.45-Z-1013-01A
		Centering sleeve	Fig 3
	Clean
14	Clean sealing surfaces	Remove sealant Do not use any sharp-edged tools or abrasive paper. The sealing surfaces can get damaged otherwise.	AR01.00-P-0050-01A
		Loctite 7200	*BR00.45-Z-1038-04A
		Loctite 7063 cleaning spray (150 ml)	*BR00.45-Z-1046-04A
15	Remove fitting sleeves (6)	Dispose of fitting sleeves (6). The fitting sleeves (6) are no longer needed.
16	Remove front radial shaft sealing ring	Replace front crankshaft radial sealing ring	AR03.20-P-3000SXI
17	Install in the reverse order
	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	Check for oil leaks with engine running

CYLINDER CRANKCASE, TIMING CASE COVER, END COVER

Number	Designation			ENGINE 642
BA01.40-P-1004-01S	Screw/bolt, timing case cover to cylinder crankcase	M6	Nm	10

Fig 3: Identifying Centering Sleeve (642 589 00 14 00)

Courtesy 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-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