Check basic position of camshafts - AR05.20-P-6010OM

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ENGINE 642

Shown on engine 642.9

Fig 1: Camshafts Basic Position - Shown On Engine 642.9 (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Camshafts Basic Position - Shown On Engine 642.9 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove cylinder head covers	MODEL 222	AR01.20-P-5014LFD
		MODEL 164, 251	AR01.20-P-5014GZB
		MODEL 166	AR01.20-P-5014OGR
		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 221	AR01.20-P-5014SXI
		MODEL 219.322	AR01.20-P-5014TQ
		MODEL 461, 463	AR01.20-P-5014GY
2	Attach set of hold-down tools (3) to center camshaft bearing of the cylinder heads	The set of hold-down tools (3) assumes function of camshaft bearings and relieve the load on camshaft brackets (2).
		Hold-down device kit	Figure
3	Remove fan unit	MODEL 222	AR20.40-P-5050LF
4	Insert protective plate for radiator	MODEL 222
			WF58.50-P-0110-01A
5	Detach charge air cooler and place with attached coolant lines to one side	MODEL 222	AR09.41-P-6819LFD
6	Remove poly-V belt	MODEL 222	AR13.20-P-0001LFD
	Check
7	Set piston on cylinder 1 to TDC (ignition TDC) and check basic position	MODEL 166 with ENGINE 642	AR05.20-P-6020OGR
		MODEL 222 with ENGINE 642	AR05.20-P-6020LFD
		MODEL 204, 207, 212, 218 with ENGINE 642	AR05.20-P-6020CO
		Turn engine at vibration damper (6) in direction of engine rotation until top dead center markings (5) on camshafts (1) stand opposite each other and markings (4), seen in the direction of travel, are aligned on the left side to the upper edge of the cylinder head. The TDC marking on the belt pulley/vibration damper (6) must be aligned with the stay on the timing case cover (7). If basic position of camshafts (1) is not OK, the timing chain must be checked for damage or chain elongation: ↓ Check timing chain.
	MODEL 461, 463		AR05.10-P-7600GY
		MODEL 219.322	AR05.10-P-7600TQ
		MODEL 211	AR05.10-P-7600TI
		MODEL 207, 212, 218, 221, 222	AR05.10-P-7600SXI
		MODEL 204	AR05.10-P-7600CO
		MODEL 203, 209	AR05.10-P-7600PI
		MODEL 166	AR05.10-P-7600OGR
		MODEL 164, 251	AR05.10-P-7600GZB
8	Install in the reverse order

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

Courtesy of MERCEDES-BENZ USA