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

ENGINE 132.910 in MODEL 451.3/4 

Fig 1: Identifying Camshaft Sprocket Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove spark plugs
			AP15.10-P-1580MCC
2	Remove cylinder head cover		AR01.20-P-5014MCU
3	Counterhold exhaust camshaft (2) at hexagon (arrow) and loosen screw/bolt (3) on camshaft sprocket (1)	Bolt, camshaft sprocket to exhaust camshaft	*BA05.20-P-1005-01M
		Plug-in adapter	Figure
		Box wrench bit	Figure
4	Detach right rear wheel		AR40.10-P-1100MCU
5	Check basic position of intake camshaft and exhaust camshaft (2)	: Turn engine in direction of engine rotation through two revolutions and check basic position of intake camshaft and exhaust camshaft (2).	AR05.20-P-6010MCU
6	Remove screw plug (4) on timing case cover (5)	Screw plug at timing case cover	*BA01.40-P-1008-01M
7	Lower vehicle with vehicle lift
8	Mark position of timing chain (6) relative to camshaft sprocket (1)
9	Mark position of camshaft sprocket (1) and camshaft positioner (7) relative to each other and to the upper edge of the timing case cover (5)
10	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 B) in the chain tensioner (9).
11	Remove screw/bolt (3); detach camshaft sprocket (1) from exhaust camshaft (2) and remove from timing chain (6)	: Ensure correct installation position of camshaft sprocket (1) on the exhaust camshaft (2). Align camshaft sprocket (1) according to the previously attached markings and insert in the timing chain (6).
12	Install in the reverse order

CYLINDER CRANKCASE, TIMING CASE COVER, END COVER

Number	Designation		ENGINE 132.9
BA01.40-P-1008-01M	Screw plug at timing case cover	Nm	50

CAMSHAFT

Number	Designation		ENGINE 132.9
BA05.20-P-1005-01M	Bolt, camshaft sprocket to exhaust camshaft	Nm	90

Fig 2: Identifying Plug-In Adapter (001 589 01 16 01)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Box Wrench Bit (001 589 01 16 09)

Courtesy of MERCEDES-BENZ USA