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Remove/Install Cylinder Head - AR01.30-P-5800MRI

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Engine 264 in model 205, 253 

MODIFICATION NOTES

25.03.2021 Check relevant sealing surfaces of Engine for unevenness, score marks, etc. Operation step 20.  
11.05.2021 Information added. Operation step 18.  
20.07.2021 Seal Engine oil ducts in crankcase with suitable stop plugs (30). Operation step 17.  
Fig 1: Cylinder Head Components Location - Engine 264 In Model 253
G14470556Courtesy of MERCEDES-BENZ USA
G14470557Courtesy of MERCEDES-BENZ USA
G14470558Courtesy 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  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning  from swallowing coolant. Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.		 AS20.00-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
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
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
Notice  Notes on coolant   AH20.00-P-2080-01KOA
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on threaded connections fastened using a tightening angle-based tightening process   AH00.00-P-0020-01A
Notice  Notes on threaded connections with aluminum screws/bolts   AH00.00-P-0006-01RM
  General information on work on gasoline direct injection system   AH07.00-P-2000-01A
REMOVINGINSTALLING Remove/install     
1 Remove cylinder head cover. INSTALLATION IMPORTANT Install top Engine cover and bottom Engine compartment linings only after the leak test. AR01.20-P-5014MRI
2 Remove charge-air distributor from cylinder head (1) and place outside of the working area.   AR09.41-P-8683MRI
3 Remove exhaust gas turbocharger with exhaust manifold.   AR09.40-P-6036MRI
4 Remove camshafts.   AR05.20-P-6992MRI
5 Remove camshaft bearing bridges (2).
General information on checking camshafts and bearing points of camshafts		   AH05.20-P-1000-09SZ
6 Remove screw (5). TORQUE SPECIFICATION Bolt, coolant line to crankcase/cylinder head/oil pan *BA20.20-P-1001-02B 
7 Remove low-pressure line from cylinder head (1).   AR07.03-P-1120MRI
8 Release and disconnect electrical connector of coolant temperature sensor (B11/4).   AR15.60-P-2712MRI
9 Remove caps (7). INSTALLATION IMPORTANT Replace caps (7).  
10 Remove bearing pins (6). SPECIAL TOOL Puller Fig 3
    SPECIAL TOOL Spindle Fig 2
11 Loosen cylinder head bolts in stages in reverse order of tightening procedure and remove them. Tightening procedure for cylinder head bolts
NOTES
Only loosen cylinder head bolts after Engine has cooled off completely.
The cylinder head (1) will otherwise be damaged.
INSTALLATION IMPORTANT Replace cylinder head bolts.		 AR01.30-P-5800-01MRH 
    TORQUE SPECIFICATION Bolt, cylinder head to timing case cover *BA01.30-P-1002-01BA 
    TORQUE SPECIFICATION Screw/bolt, cylinder head to crankcase *BA01.30-P-1001-01BA 
12 Remove cylinder head (1). INSTALLATION IMPORTANT Fit a new cylinder head gasket on the crankcase.
Pay attention to pilot bushings for fastening of cylinder head (1).		  
13 Remove spark plugs. When replacing the cylinder head (1).  
REFER TO MAINTENANCE     AP15.10-P-1580MCU
14 Remove coolant temperature sensor (B11/4). When replacing the cylinder head (1). AR15.60-P-2712MRI
15 Remove hydraulic valve play compensation elements. When replacing the cylinder head (1). AR05.00-P-2011MRI
16 Remove valves. When replacing the cylinder head (1).  
  General information on checking valves, valve seats and valve guides   AH05.30-P-1000-02SZ
      AR05.30-P-3511MRI
17 Seal Engine oil ducts in crankcase with suitable stop plugs (30). IMPORTANT Ensure stop plugs (30) are correctly seated in Engine oil ducts.
IMPORTANT Before removal of stop plugs (30), thoroughly clean area of sealing surface at crankcase with compressed air.
SPECIAL TOOL Record plug		 Fig 4
CLEAN Clean     
18 Clean sealing surfaces on the cylinder head (1), timing case cover, and crankcase. NOTES
Do not use any sharp-edged tools or abrasive paper.
Sealing surfaces can otherwise be damaged, Engine and environmental damage can as a result occur.
NOTES
The machining and/or cleaning of sealing surfaces via spot grinding with abrasive paper or other abrasive materials to remove seal residues are not permitted.
Even the smallest quantities of aluminum oxide, grinding particles and abrasion that enter the Engine oil chamber, the bearing points or the combustion chambers lead to damage and thus to Engine damage.
IMPORTANT The sealing surfaces must feel even after treatment. The sealing surface do not have to be metallic bright, thin layers of firmly adhering silicone sealant can remain.
IMPORTANT Solely cleaning with the approved adhesive and sealant remover is permitted.
IMPORTANT Observe processing information from manufacturer.		 AR01.00-P-0050-01A
    Loctite 7063 (400 ml) cleaning spray *BR00.45-Z-1046-04A 
    Loctite 7200 *BR00.45-Z-1038-04A 
19 Cover threaded holes of cylinder head bolts in crankcase with rags and blow out with compressed air.    
INSPECT Check     
20 Check sealing surfaces of the cylinder head (1), timing case cover, and crankcase for cracks and unevenness. IMPORTANT The tightening of the cylinder head bolts offsets a slight distortion of cylinder head (1) in the longitudinal or transverse direction.
IMPORTANT Check relevant sealing surfaces of Engine for unevenness, score marks, etc.
If unevenness, score marks, etc. are present,
↓
Replace affected component.		  
21 Install in the reverse order.    
22 Change Engine oil and oil filter element.    
REFER TO MAINTENANCE   Engine 264 in model 205
with code M005 (Vehicles with 4MATIC/all-wheel drive)
Engine 264 in model 253		 AP18.00-P-0101E
REFER TO MAINTENANCE   Engine 264 in model 205
except code M005 (Vehicles with 4MATIC/all-wheel drive)		 AP18.00-P-0101EE
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
23 Perform Engine test run. While doing so, check Engine for proper operation and leak tightness.    
CYLINDER HEAD

Number Designation Engine 264
BA01.30-P-1001-01BA Screw/bolt, cylinder head to crankcase Stage 1 Nm 10
Stage 2 Nm 40
Stage 3 ∠° 90
Stage 4 ∠° 90
Stage 5 ∠° 90
CYLINDER HEAD

Number Designation Engine 264
BA01.30-P-1002-01BA Bolt, cylinder head to timing case cover Nm 20
ENGINE RADIATOR, COOLANT HOSES AND LINES

Number Designation Engine 264
BA20.20-P-1001-02B Bolt, coolant line to crankcase/cylinder head/oil pan Nm 8
Fig 2: Identifying Spindle (270 589 00 33 02)
G13743964Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Puller (605 589 00 33 00)
G13743965Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Record Plug (129 589 00 91 00)
G12935125Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1038-04A Loctite 7200 A 010 989 90 71
BR00.45-Z-1046-04A Loctite 7063 (400 ml) cleaning spray A 001 986 71 71 09
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