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

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ENGINES 272, 273 in MODEL 212

On exhaust camshafts

Fig 1: Camshaft Adjusters Remove/Install Components - Exhaust Camshafts (1 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 2: Camshaft Adjusters Remove/Install Components - Exhaust Camshafts (2 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 3: Camshaft Adjusters Remove/Install Components - Exhaust Camshafts (3 Of 3)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove air filter housing		AR09.10-P-1150EWS
2	Remove front cover at respective cylinder head	Left cylinder head	AR01.30-P-5700EWL
		Right cylinder head	AR01.30-P-5700EWR
3.1	Remove centrifuge	For removal on right cylinder head	AR01.20-P-2100EWS
3.2	Remove cap (26) For removal on right cylinder head
4	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
			Fig 4
5	Lock gear backlash compensation for respective camshaft adjuster (13 or 14)		AR05.20-P-7201-05VA
6	Detach center valve (5 or 6) for respective camshaft adjuster (13 or 14)	Observe loosening direction. Tightening of center valve (5 or 6) may only take place for a removed chain tensioner. Malfunctions of camshaft adjustment can occur otherwise.	AR05.20-P-7201-06VA
			*BA05.20-P-1009-02A
7	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 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).
8	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
9	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
10	Conduct engine test run and check engine for leaks

CAMSHAFT, CAMSHAFT ADJUSTMENT

Number	Designation		Engine 272	Engine 273
BA05.20-P-1009-02A	Center valve for pulse wheel/camshaft adjuster to camshaft	Nm	145	145

Fig 4: Identifying Wrench Socket (001 589 65 09 00)

Courtesy of MERCEDES-BENZ USA