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

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ENGINE 642 

Fig 1: Identifying Camshaft Sprocket Components (1 Of 2)
G06878000Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 2: Identifying Camshaft Sprocket Components (2 Of 2)
G06878001Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
MODIFICATION NOTES

24.7.08 "Lock camshaft" added Step 12
REMOVINGINSTALLING 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 AR01.20-P-5014OGE
Model 211 AR01.20-P-5014TI
Model 219 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 IMPORTANT The SPECIAL TOOL set of hold-down devices (9) with the cylinder head creates the camshaft bearing.  
TORQUE SPECIFICATION *BA01.30-P-1004-01S 
SPECIAL TOOL Figure
3 Set piston on the cylinder 1 to ignition top dead center (OT) IMPORTANT The TDC marking (arrow) on vibration damper (7) must be aligned with stay on timing case cover (6).  
4 Inspect timing IMPORTANT For ignition TDC of piston 1 markings (8) on the camshaft (1) must stand opposite to each other exactly.
NOTESInstallation:  Engine damage due to false timing. Put the timing chain (14) in place again if markings (8) are displaced for ignition TDC of piston 1.		  
5 Mark position of timing chain (14) relative to camshaft sprocket (4, 5) IMPORTANT Use touch-up paint pen.  
6 Loosen bolt (11) by turning engine on vibration damper (7) until bolt (11) is accessible IMPORTANT Only loosen bolt (11), do not remove.  
TORQUE SPECIFICATION *BA05.10-P-1004-01L 
7 Position piston of cylinder 1 to ignition TDC again IMPORTANT Observe top dead center marking (arrow) and markings (8).  
8 Loosen bolts (12) IMPORTANT Only loosen bolts (12) do not remove.  
TORQUE SPECIFICATION *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 AR05.10-P-7800SXI
Model 211 AR05.10-P-7800TI
Model 219 AR05.10-P-7800TQ
Model 461, 463 AR05.10-P-7800GY
10 Remove set of hold-down devices (9) from cylinder head TORQUE SPECIFICATION *BA01.30-P-1004-01S 
SPECIAL TOOL Figure
11 Remove camshaft holder (10) TORQUE SPECIFICATION *BA01.30-P-1004-01S 
12 Fix cable tie to timing chain (14)    
13 Remove camshaft (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 camshaft (1) IMPORTANT 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: Identifying Hold down Device Kit (642 589 00 31 00)
G06878002Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
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