Remove/install camshaft sprocket - AR05.20-P-6040OM

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ENGINES 642

Fig 1: Camshaft Sprocket Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Camshaft Sprocket Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove cylinder head covers	Model 164, 251	AR01.20-P-5014GZB
		Model 203, 209 right cylinder head cover	AR01.20-P-5012PI
		Model 203, 209 left cylinder head cover	AR01.20-P-5013PI
		Model 204	AR01.20-P-5014CO
		Model 207, 212, 218	AR01.20-P-5014OGE
		Model 211	AR01.20-P-5014TI
		Model 219.322	AR01.20-P-5014TQ
		Model 221	AR01.20-P-5014SXI
		Model 461, 463	AR01.20-P-5014GY
2	Attach set of hold-down devices (9) to cylinder head	The set of hold-down devices (9) with the cylinder head creates the camshaft bearing.	*BA01.30-P-1004-01S
		Hold-down device kit	Figure
3	Set piston on the cylinder 1 to ignition top dead center (OT)	The TDC marking (arrow) on vibration damper (7) must be aligned with stay on timing case cover (6).
4	Inspect timing	For ignition TDC of piston 1 markings (8) on the camshaft (1) must stand opposite to each other exactly. Put the timing chain (14) in place again if markings (8) for ignition TDC on piston 1 are displaced. Engine damage can occur otherwise due to wrong timing.
5	Mark position of timing chain (14) relative to camshaft sprocket (4, 5)	Use touch up paint pen.
6	Loosen bolt (11) by turning engine on vibration damper (7) until bolt (11) is accessible	Only loosen bolt (11), do not remove.
			*BA05.10-P-1004-01L
7	Position piston of cylinder 1 to ignition TDC again	Observe top dead center marking (arrow) and markings (8).
8	Loosen bolts (12)	Only loosen bolts (12) do not remove.
			*BA05.10-P-1004-01L
9	Remove chain tensioner (2)	Model 164, 251	AR05.10-P-7800GZB
		Model 203, 209	AR05.10-P-7800PI
		Model 204	AR05.10-P-7800CO
		Model 207, 212, 221, 218	AR05.10-P-7800SXI
		Model 211	AR05.10-P-7800TI
		Model 219.322	AR05.10-P-7800TQ
		Model 461, 463	AR05.10-P-7800GY
10	Remove set of hold-down devices (9) on cylinder head		*BA01.30-P-1004-01S
		Hold-down device kit	Figure
11	Remove camshaft holder (10)		*BA01.30-P-1004-01S
12	Fix cable tie to timing chain (14)
13	Remove camshafts (1) with camshaft sprocket (4, 5)
14	Lay timing chain (14) with cable tie in timing chain chamber
15	Remove bolts (11, 12) and camshaft sprocket (4, 5) from camshafts (1)	In a removed condition.
16	Install in the reverse order

CYLINDER HEAD

Number	Designation		Engine 642
BA01.30-P-1004-01S	Camshaft retainer bracket on cylinder head	Nm	8

TIMING CHAIN, CHAIN TENSIONER

Number	Designation		Engine 642
BA05.10-P-1004-01L	Bolt, camshaft sprocket to camshaft	Nm	18

Fig 3: Hold-down Device Kit (642 589 00 31 00)

Courtesy of MERCEDES-BENZ USA