Remove/install camshaft adjusters - AR05.20-P-7201SY

ENGINES 272, 273 in MODEL 221 Camshaft adjuster for exhaust camshafts 

ENGINES 273 in MODEL 216 Camshaft adjuster for exhaust camshafts 

Fig 1: Identifying Camshaft Adjusters Remove/Install Components (1 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Camshaft Adjusters Remove/Install Components (2 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Camshaft Adjusters Remove/Install Components (3 Of 3)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Switch off ignition
2	Remove air filter housing		AR09.10-P-1150SX
3	Remove front cover at respective cylinder head	Left cylinder head	AR01.30-P-5700SX
		Right cylinder head	AR01.30-P-5700SY
4.1	Remove centrifuge	When removing from right camshaft adjuster (13).	AR01.20-P-2100SX
4.2	Remove cap (26)	When removing from left camshaft adjuster (14).
5	Turn engine at crankshaft center bolt in direction of engine rotation to a 40° crank angle after ignition TDC and check position of camshafts		AR05.20-P-6010-01VB
6	Lock gear backlash compensation for respective camshaft adjuster (13 or 14)		AR05.20-P-7201-05VA
7	Detach center valve (5 or 6) for respective camshaft adjuster (13 or 14)	Observe loosening direction.	AR05.20-P-7201-06VA
			*BA05.20-P-1009-02A
8	Remove center valve (5 or 6) for respective camshaft adjuster (13 or 14) and remove pulse wheel (9 or 10)	Check dowel pin (18) and pin (19). If a dowel pin (18) or pin (19) is sheared off then this must be removed from respective camshaft adjuster (13 or 14). Always replace pulse wheel (9 or 10). When tightening the center valve (5 or 6) there is a risk that dowel pin (18) or pin (19) may shear at the pulse wheel (9 or 10). Lubricate center valve (5 or 6) at contact surface with pulse wheel (9 or 10) before assembling. Align dowel pin (18) for pulse wheel (9 or 10) with the fitted bore (20) in the camshaft adjuster (13 or 14).
9	Counterhold respective exhaust camshaft (2) at the rear using a suitable tool and detach camshaft adjuster (13 or 14) forwards from the exhaust camshaft (2)	Lubricate contact surfaces on exhaust camshaft (2) and camshaft adjuster (13 or 14) before assembling camshaft adjuster (13 or 14). Align dowel pin (21) in camshaft adjuster (13 or 14) to fitted bore (22) in exhaust camshaft (2) and install camshaft adjuster (13 or 14) in its basic position:
		See "Check basic position of camshafts".	AR05.20-P-6010-01VB
10	Install in the reverse order
	Checking
	Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
11	Conduct engine test run and check engine for leaks