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Remove/install check valve for chain tensioner to cylinder head - AR01.30-P-5810EL

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ENGINE 157, 278 in MODEL 212, 218 

ENGINE 276 in MODEL 212, 218 

MODIFICATION NOTES

7.8.13 Remove/install oil filter housing, added Operation step 1, 13  

Shown on cylinder head with stepped hole 

Fig 1: Valve For Chain Tensioner To Cylinder Head Remove/Install Components - Shown On Cylinder Head With Stepped Hole
G09973896Courtesy of MERCEDES-BENZ USA

Shown on cylinder head without stepped hole 

Fig 2: Valve For Chain Tensioner To Cylinder Head Remove/Install Components - Shown On Cylinder Head Without Stepped Hole (1 Of 3)
G09973897Courtesy of MERCEDES-BENZ USA
Fig 3: Valve For Chain Tensioner To Cylinder Head Remove/Install Components - Shown On Cylinder Head Without Stepped Hole (2 Of 3)
G09973898Courtesy of MERCEDES-BENZ USA
Fig 4: Valve For Chain Tensioner To Cylinder Head Remove/Install Components - Shown On Cylinder Head Without Stepped Hole (3 Of 3)
G09973899Courtesy of MERCEDES-BENZ USA
REMOVING Remove     
1 Remove oil filter housing ENGINE 157, 278 AR18.20-P-3471ELB
2 Remove chain tensioner ENGINE 276 AR05.10-P-7800EL
Engine 157, 278 AR05.10-P-7800ELB
3 Cover chain shaft with rags IMPORTANT Cover chain shaft with rags in such a way that no parts can fall in.  
4 Pull check valve (02a or 02b) out of the cylinder head using an extractor NOTES Set the thread length of the extractor to a residual length of about 4 mm with shims and a nut M6 before disassembly of the check valve (02a or 02b).
Damage will occur to the check valve (02a or 02b) otherwise and therefore breakage of the valve body, which leads to more difficult removal of the check valve (02a or 02b).
NOTES The check valve (02a or 02b) will be destroyed during disassembly and cannot be used again.
Engine damage will occur when reusing the check valve (02a or 02b) due to inner damage on the valve body.
 
    SPECIAL TOOL Puller Figure
CLEAN Clean     
5 Clean oil supply duct (01a or 01b) in the cylinder head (01)    
INSPECT Check     
6 Check the oil supply duct (01a or 01b) on the cylinder head (01) with the bur shaft (1) of a 8.0 mm drill bit NOTES Only check the oil supply duct (01a or 01b) with the bur shaft (1).
Damage will occur on the oil supply duct (01a or 01b) otherwise and therefore engine damage will occur.
IMPORTANT If the bur shaft (1) can be inserted into the oil supply duct (01a) then it is a cylinder head (01) with a stepped hole (see picture 2). If the bur shaft (1) cannot be inserted into the oil supply duct (01a) then there is a cylinder head (01) without a stepped hole installed (see picture 1).
 
INSTALLING Install     
7 Press the check valve (02a or 02b) by hand into the oil supply duct (01a or 01b)    
REFER TO COMPONENT MODIFICATIONS Cylinder head changed IMPORTANT The closed side of the check valve (02a or 02b) points with the ball to the rear and the open side with the thread points to the front in the direction of the chain tensioner. BT01.30-P-0004-01MM
8 Mount the press-in tool at the chain tensioner threaded holes (01c) on the cylinder head (01) NOTES Do not exceed a tightening torque of 5 Nm. Damage will occur to the cylinder head (01) otherwise.
IMPORTANT The press-in tool consists of the press-in tool basic carrier (2a), the installer (2b) and the press-in screw (2c).
 
    SPECIAL TOOL Press-in tool Fig 6
9 Press check valve (02a or 02b) into the cylinder head (01) using the press-in tool IMPORTANT Press check valve (02a or 02b) into the oil supply duct (01a or 01b) in the cylinder head (01) using the press-in screw (2c) of the press-in tool.
IMPORTANT For correct assembly the check valve (02a or 02b) must sit flush in the cylinder head (01) and must not project out.
 
10 Disassemble press-in tool    
11 Remove rags from chain shaft IMPORTANT Remove rags in such a way that no parts or dirt particles which are on the rags can fall into the chain shaft.  
12 Install chain tensioner ENGINE 276 AR05.10-P-7800EL
Engine 157, 278 AR05.10-P-7800ELB
13 Install oil filter housing ENGINE 157, 278 AR18.20-P-3471ELB
Fig 5: Identifying Puller (605 589 00 33 00)
G09973900Courtesy of MERCEDES-BENZ USA
Fig 6: Identifying Press Tool (276 589 00 33 00)
G09973901Courtesy of MERCEDES-BENZ USA