Set basic position of camshafts - AR05.20-P-6020M

ENGINE 275 in MODEL 215, 216, 220, 221, 230 

Fig 1: Identifying Cylinder Head Cover, Fan Shroud, Camshaft Bearing Cap And Belt Pulley/Vibration Damper (Shown On Model 220)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Circlip, Camshaft Sprocket, Centrifuge, O-Ring And Bolts

Courtesy of MERCEDES-BENZ USA

	Removing
	Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, lift gates or sliding roof	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
1	Drain coolant at radiator		AR20.00-P-1142H
	Notes on coolant		AH20.00-N-2080-01A
2	Remove coolant thermostat housing		AR20.10-P-2710M
3	Remove air pump	Model 215, 220	AR14.30-P-7251L
		Model 216, 221	AR14.30-P-7251SZ
		Model 230	AR14.30-P-7251R
4.1	Remove fan shroud (1)	Model 215.376, 220.176, 230 without code (P99) Special model "AMG Black Series"	AR20.40-P-6800AC
		Model 215.379, 220.179	AR20.40-P-6800IM
		Model 216, 221 except 216.379, 221.179	AR20.40-P-6800SZ
		Model 216.379, 221.179	AR20.40-P-6800SXM
4.2	Remove fan unit	Model 230 with code (P99) Special model "AMG Black Series"	AR20.40-P-5050RBS
5	Remove cylinder head covers (2)		AR01.20-P-5014H
6	Remove front cover at left cylinder head		AR01.30-P-5700ML
7	Remove front cover at the right cylinder head		AR01.30-P-5700MR
8	Check basic position of camshafts (11)		AR05.20-P-6010MC
9	Remove circlip (4) of left camshaft sprocket (5) and remove centrifuge (7)	Installation:  Install new O-ring (8).
10	Loosen bolts (9) for camshaft sprockets (5, 6)	To loosen bolts (9), turn camshafts (11) in such a way that holding devices (3) can be mounted free of tension at cylinder heads.
		Retainer (left camshaft)	*285589004000
		Retainer (right camshaft)	*137589014000
11	Detach retainers (3)
12	Position piston of cylinder a 1 to 30° crank angle after ignition TDC	Rotate engine at crankshaft in direction of engine rotation until marking for a 30° crank angle on the belt pulley/vibration damper (12) coincides with marking on the timing case cover (arrow). The marking (A) of the camshaft bearing cap (10) must be aligned with the marking (B) of the camshaft (11). The engine must not be turned back, otherwise timing chain can skip and this can result in engine damage.
13	Remove chain tensioner	Model 215, 220	AR05.10-P-7800M
		Model 216, 221	AR05.10-P-7800SZ
		Model 230	AR05.10-P-7800R
14	Remove camshaft sprockets (5, 6)	Mark camshaft sprockets (5, 6) and timing chain relative to each other.
	Install
15	Turn left camshaft (11) to basic position	The basic position of camshaft (11) is only correct if retaining device (3) can be installed free of stress at the left cylinder head. The marking (A) of the camshaft bearing cap (10) must be aligned with the marking (B) of the camshaft (11). At a 30° crank angle after ignition TDC of cylinder 1 it is possible to rotate camshaft (11) without valves coming into contact with the pistons.
			*104589010100
			*285589004000
16	Turn right camshaft (11) to basic position	The basic position of right camshaft (11) is only correct if retaining device (3) can be installed free of stress at the right cylinder head. The marking (A) of the camshaft bearing cap (10) must be aligned with the marking (B) of the camshaft (11). At a 30° crank angle after ignition TDC of cylinder 1 it is possible to rotate camshaft (11) without valves coming into contact with the pistons.
			*104589010100
			*137589014000
17	Install camshaft sprockets (5, 6)		*BA05.20-P-1001-02I
18	Detach retainers (3)
19	Install chain tensioner	Model 215, 220	AR05.10-P-7800M
		Model 216, 221	AR05.10-P-7800SZ
		Model 230	AR05.10-P-7800R
20	Check basic position of camshafts (11)		AR05.20-P-6010MC
21	Install front cover on right cylinder head		AR01.30-P-5700MR
22	Install front cover on left cylinder head		AR01.30-P-5700ML
23	Install cylinder head covers (2)		AR01.20-P-5014H
24.1	Install fan shroud (1)	Model 215.376, 220.176, 230 without code (P99) Special model "AMG Black Series"	AR20.40-P-6800AC
		Model 215.379, 220.179	AR20.40-P-6800IM
		Model 216, 221 except 216.379, 221.179	AR20.40-P-6800SZ
		Model 216.379, 221.179	AR20.40-P-6800SXM
24.2	Install fan unit	Model 230 with code (P99) Special model "AMG Black Series"	AR20.40-P-5050RBS
25	Install air pump	Model 215, 220	AR14.30-P-7251L
		Model 216, 221	AR14.30-P-7251SZ
		Model 230	AR14.30-P-7251R
26	Install coolant thermostat housing		AR20.10-P-2710M
27	Pour in coolant		AR20.00-P-1142H
28	Inspect cooling system for leaks	Model 215, 220, 230	AR20.00-P-1010HA
		Model 216, 221	AR20.00-P-1010SX

CAMSHAFT

Number	Designation				Engine 275, 285
BA05.20-P-1001-02I	Camshaft sprocket bolt	M8x16	Stage 1	Nm	20
			Stage 2	∠°	90

Fig 3: Identifying Holding Device (137 589 01 40 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Holding Device (285 589 00 40 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Open-End Wrench, Double (104 589 01 01 00)

Courtesy of MERCEDES-BENZ USA