Remove/install tensioning rail

AR05.10-P-8127RX

Remove/install tensioning rail

28.11.11

26.11.07

Installation note on install new chain tensioner, added

Step 11

 

Remove/install

1

Remove air filter housing

AR09.10-P-1150RX

2

Remove front covers from cylinder heads

Front cover on the right

AR01.30-P-5700RY

Front cover on the left

AR01.30-P-5700RX

3

Remove centrifuge

AR01.20-P-2100RX

4

Crank engine at crankshaft center bolt in direction of engine rotation to a 40° crankshaft angle after ignition TDC and check position of camshafts

AR05.20-P-6010-01VB



*001589650900

5

Lock gear backlash compensation for camshaft adjuster (13) at right exhaust camshaft (1)

AR05.20-P-7201-05VA

6

Loosen center valve (5) on right exhaust camshaft (1)

AR05.20-P-7201-06VA



*BA05.20-P-1009-02A

7

Remove right cylinder head cover

AR01.20-P-5014RY

8

Remove center valve (5) for right exhaust camshaft (1) and remove pulse wheel (9)

 Check dowel pin (18) and pin (19). If dowel pin (18) or pin (19) has sheared off, it must be removed from camshaft adjuster (13).

 Installation: Always replace pulse wheel (9). When tightening center valve (5), there is a risk that dowel pin (18) or pin (19) on pulse wheel (9) may shear off. Lubricate center valve (5) at contact surface to pulse wheel (9) before assembly.

 Installation: Align dowel pin (18) on pulse wheel (9) with bore (20) in the camshaft adjuster (13).

9

Counterhold right rear exhaust camshaft (1) using a suitable tool and detach camshaft adjuster (13) from right exhaust camshaft (1) in the forward direction

 Installation: Align dowel pin (21) in camshaft adjuster (13) to fitted bore (22) in exhaust camshaft (1) and install camshaft adjuster (13) in its basic position:

See "Check basic position of camshafts".

AR05.20-P-6010-01VB

10

Remove auxiliary bearing cap (17) on right exhaust camshaft (1) and take out exhaust camshaft (1)



*BA05.20-P-1010-02A

11

Remove chain tensioner

 Installation: Install new chain tensioner. The previously installed chain tensioner must not be reinstalled because during removal, its pressure pin is pressed into the end position. The thrust pin latch prevents this return stroke. This would overstretch the timing chain on reinstalling.

AR05.10-P-7800RX

12

Remove tensioning rail bolt (23)

 Installation: Apply sealant to tensioning rail bolts (23) before assembly.

AR01.30-P-5800-04V



*116589203300



*116589013400

Loctite 5970 sealant

*BR00.45-Z-1013-01A

13

Pull tensioning rail (24) up and out of timing case

14

Install in the reverse order

Number

Designation

Engine
272

Engine
273

BA05.20-P-1009-02A

Center valve for pulse wheel/camshaft adjuster to camshaft

Nm

145

145

BA05.20-P-1010-02A

Bolt, auxiliary bearing cap to cylinder head

Stage 1

Nm

8

8

Stage 2

°

-

-

Number

Designation

Order number

BR00.45-Z-1013-01A

Loctite 5970 sealant

A 003 989 98 20