Correct basic position of camshafts - AR05.20-P-6025MCC

ENGINES 132.9 in MODEL 451.3/4 

Fig 1: Identifying Crankshaft Belt Pulley And Timing Case Cover

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Camshafts Related Components

Courtesy of MERCEDES-BENZ USA

Shown with the engine removed 

Fig 3: Identifying Camshafts Related Components - Shown With Engine Removed

Courtesy of MERCEDES-BENZ USA

	Removing
1	Bring intake camshaft (10) and exhaust camshaft (2) into their basic position	The marking (arrow A or arrow B) on the crankshaft (11) belt pulley must be correspond during the whole correction process with marking "10" (arrow C) on the timing case cover (5). The marking "10" (arrow C) represents 10° BTDC. * not for USA	AR05.20-P-6010MCC
		* for USA only	AR05.20-P-6010MCU
2	Counterhold exhaust camshaft (2) at hexagon (arrow D) and loosen bolt (3) on camshaft sprocket (1)		Fig 4
			Fig 5
3	Remove screw plug (4) on timing case cover (5)
4	Press timing chain (6) downwards using a suitable tool in the area between the camshaft sprocket (1) and the camshaft adjuster (7), push back ratchet (8) on chain tensioner (9) using a suitable screwdriver and lock chain tensioner (9)	An aid for pressing down the timing chain (6) is required. In order to lock the chain tensioner (9), place a pin with a diameter of 1.5 mm into the bore (arrow E) in the chain tensioner (9).
5	Remove bolt (3); detach camshaft sprocket (1) from exhaust camshaft (2) and remove from timing chain (6)
	Adjust
6	Lift timing chain (6) and turn intake camshaft (10) on hexagon in the direction of the arrow until marking (arrow F) on the camshaft adjuster (7) is standing at the height of the timing case cover contact surface (5)	Do not turn intake camshaft (10) against the direction of the arrow; this can cause folding up of the timing chain (6) which will cause damage.
7	Lay timing chain (6) on camshaft adjuster (7) ring gear
8	Turn exhaust camshaft (2) at hexagon (arrow D) until the drive plate (12) is vertical to the timing case cover (5) contact surface
9	Align camshaft sprocket (1) according to markings (arrow G) and insert in the timing chain (6).	The marking (arrow G) must stand at the height of the timing case cover (5) contact surface and opposite the marking (arrow F) on the camshaft adjuster (7).
10	Screw bolt (3) into exhaust camshaft (2) for centering	Just put bolt (3) into place; do not tighten.
11	Press camshaft sprocket (1) with the cutout (arrow H) onto the exhaust camshaft (2) drive plate (12)	Turn exhaust camshaft (2) at hexagon if necessary.
	Install
12	Counterhold exhaust camshaft (2) at hexagon (arrow D) and tighten bolt (3) on camshaft sprocket (1)		Fig 4
			Fig 5
			*BA05.20-P-1005-01M
13	Push timing chain (6) downwards using a suitable tool in the area between the camshaft sprocket (1) and the camshaft adjuster (7); pull out the pin from the bore (arrow E) on chain tensioner (9)	An aid for pressing down the timing chain (6) is required.
14	Remove screw plug (4) on timing case cover (5)	Use new sealing ring.	*BA01.40-P-1008-01M
15	Turn engine in direction of engine rotation through two revolutions
16	Again check basic position of intake camshaft (10) and exhaust camshaft (2)	Repeat steps 2 to 16 times if necessary. * not for USA	AR05.20-P-6010MCC
		* for USA only	AR05.20-P-6010MCU
17	Install cover for the belt pulley (11)
18	Attach right rear wheel	* not for USA	AR40.10-P-1100MCC
		* for USA only	AR40.10-P-1100MCU
19	Install cylinder head cover	* not for USA	AR01.20-P-5014MCC
		* for USA only	AR01.20-P-5014MCU

Fig 4: Identifying Plug-In Adapter (001 589 01 16 01)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Box Wrench Bit (001 589 01 16 09)

Courtesy of MERCEDES-BENZ USA