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

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Engine 260 in model 118, 177, 247 

MODIFICATION NOTES

27.04.2022 Document completely revised.    

Example illustration 

G16049478Courtesy of MERCEDES-BENZ USA
WARNING 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
WARNING 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
CAUTION 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
CAUTION 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
Notice  Notes on threaded connections fastened using a tightening angle-based tightening process   AH00.00-P-0020-01A
REMOVING Remove     
1 Remove front right fender liner.   AR88.10-P-1301MFA
2 Turn engine at center bolt of crankshaft in direction of engine rotation to top dead center (ignition TDC) at cylinder 1. IMPORTANT The TDC marking on belt pulley/vibration damper must be aligned with positioning edge on timing case cover.
SPECIAL TOOL Socket wrench bit		 Fig 3
3 Remove cylinder head cover.   AR01.20-P-5014MFC
4 Install hold-down tool (01a) of camshafts (4) with holding devices (02a, 02e) for camshafts (4). IMPORTANT Ensure use of the correct bearing bracket on the SPECIAL TOOL holding device (02a, 02e).
IMPORTANT Use Ø 29 mm inserts.
SPECIAL TOOL Holding device		 Fig 1
5 Remove the chain tensioner.   AR05.10-P-7800MFC 
6 Unfasten control valve (2) for the respective camshaft positioner (1) and remove. SPECIAL TOOL Holding device Fig 1
    SPECIAL TOOL Socket Fig 2
7 Lift off timing chain (3) from corresponding camshaft positioner (1) and remove corresponding camshaft positioner (1). IMPORTANT Mark installation position of the timing chain (3) relative to the camshaft positioner (1).  
INSPECT Check     
8 Check toothing of camshaft positioner (1) for damage. If there is a problem:
↓
Replace camshaft positioner (1).		  
9 Check timing chain (3) for damage. If there is a problem:
↓
replace timing chain (3).		 AR05.10-P-7601MFC 
INSTALLING Install     
10 Install camshaft positioner (1) and tighten control valve (2) slightly by hand.    
REFER TO CAPACITIES & SPECIFICATIONS Specified engine oils for Cars, Vans (service) - Overview IMPORTANT Observe markings on installation position of timing chain (3).
IMPORTANT During installation of camshaft positioner (1) and/or timing chain (3), ensure that crankshaft is not twisted.
IMPORTANT The final torque of the control valve (2) is only realized after the chain tensioner has been installed.
IMPORTANT It must still be possible to turn the camshaft positioner (1) to the camshaft (4).
IMPORTANT Wet thread and bolt head contact surface of control valve (2) with engine oil. Tighten control valve (2) evenly without discontinuity.		 BB00.40-P-0223-02A
11 Install the chain tensioner.   AR05.10-P-7800MFC 
12 Tighten control valve (2) of corresponding camshaft positioner (1) to final torque. TORQUE SPECIFICATION Center valve, pulse wheel/camshaft adjuster to camshaft *BA05.20-P-1002-02K 
    SPECIAL TOOL Holding device Fig 1
    SPECIAL TOOL Socket Fig 2
13 Remove hold-down tool (01a) of camshafts (4) with holding devices (02a, 02e) for camshafts (4). SPECIAL TOOL Holding device Fig 1
14 Install cylinder head cover. IMPORTANT Do not install upper engine cover until after the leak test. AR01.20-P-5014MFC
INSPECT Check     
15 Crank engine at center bolt of crankshaft in direction of engine rotation x 2 and position again at top dead center (ignition TDC) at cylinder 1. SPECIAL TOOL Socket wrench bit Fig 3
16 Check basic position of camshafts (4) and correct if necessary.   AR05.20-P-6010MFC 
WARNING 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
17 Perform engine test run. While doing so, check engine for proper operation and leak tightness.    
18 Install front right fender liner.   AR88.10-P-1301MFA
19 Install upper engine cover.    
REFER TO MAINTENANCE     AP01.10-P-2405-01C
CAMSHAFT, CAMSHAFT ADJUSTMENT

Number Designation Engine 260
BA05.20-P-1002-02K Center valve, pulse wheel/camshaft adjuster to camshaft Stage 1 Nm 18
Stage 2 ∠° 45
Fig 1: Identifying Holding Device (270 589 01 61 00)
G13743872Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Socket (271 589 00 10 00)
G13744051Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Socket Wrench Bit (001 589 65 09 00)
G11972630Courtesy of MERCEDES-BENZ USA
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