Remove/Install Camshaft Positioner - AR05.20-P-7204MFG

Engine 139 in model 118, 177, 247 

MODIFICATION NOTES

28.11.2022

The camshaft positioner (1) of the intake camshaft does not have a tensioning ring. The compression wheel sits loose on the camshaft positioner (1) of the intake camshaft and is not a reason to replace the camshaft positioner (1) of the intake camshaft.

Operation step 5.

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Courtesy of MERCEDES-BENZ USA

	Risk of injury.  Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of injury.  Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	Risk of injury  to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-0001-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Notice	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove/install
1	Remove cylinder head cover.	Only install upper engine cover after the leak test.	AR01.20-P-5014MFG
2	Install brackets (6).		AR05.20-P-6020-03MFG
		Holding device	Fig 2
3	Rotate engine at center bolt of crankshaft to ignition TDC at cylinder 1.		AR01.10-P-1000-01MFG
		Counterholder	Fig 4
4	Install holders (7).		AR05.20-P-6020-03MFG
		Holding device	Fig 2
5	Turn the intermediate gears (3a and 3b) with the counterholder of the assembly tool so that the locks (4) can be inserted into the openings (5) and the spur gears (3) are blocked.	The camshaft positioner (1) of the intake camshaft does not have a tensioning ring. The compression wheel sits loose on the camshaft positioner (1) of the intake camshaft and is not a reason to replace the camshaft positioner (1) of the intake camshaft. Twist camshaft positioners (1) such that the openings (5) are in the 12 o'clock position. Assembly tool	Fig 1
6	Remove control valve (2) of the corresponding camshaft positioner (1).
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
		Ensure that the control valve (2) of the exhaust camshaft is a left-hand thread. Otherwise, damage will occur when loosening or tightening. Ensure that the control valve (2) of the intake camshaft is a right-hand thread. Otherwise, damage will occur when loosening or tightening. Wet the thread and bolt head contact surface of the control valve (2) with engine oil. Tighten control valve (2) uniformly without interruption to specified torque. When tightening the control valve (2), the assembly torque must not be supported on the camshaft positioner (1). Replace removed control valves (2).	BB00.40-P-0223-02A
		Center valve, pulse wheel/camshaft adjuster to camshaft	*BA05.20-P-1002-02K
		Socket wrench bit	Fig 3
7	Remove corresponding camshaft positioner (1).	Camshaft positioners (1) may only be reused if they had no noticeable problems in prior operation.
8	Install in the reverse order.
	Check
9	Turn engine at center bolt of crankshaft x 2 in direction of engine rotation to ignition TDC at cylinder 1.		AR01.10-P-1000-01MFG
		Counterholder	Fig 4
10	Check basic position of camshafts.		AR05.20-P-6010MFG
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
11	Perform engine test run; in this connection check engine for leak tightness and proper operation.
12	Install upper engine cover.
			AP01.10-P-2405-01K

CAMSHAFT, CAMSHAFT ADJUSTMENT

Number	Designation			Engine 139
BA05.20-P-1002-02K	Center valve, pulse wheel/camshaft adjuster to camshaft	Stage 1	Nm	18
		Stage 2	∠°	35

Fig 1: Identifying Assembly Tool (256 589 02 31 00)

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Fig 2: Identifying Holding Device (139 589 00 40 00)

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Fig 3: Identifying Socket Wrench Bit (177 589 00 09 00)

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Fig 4: Identifying Counterholder (654 589 00 40 00)

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