Replace timing chain

AR05.10-P-7601MT

Replace timing chain

23.06.2014

ENGINE

270.9 in MODEL 117, 156, 176, 242, 246.2

1

Timing chain

3

Chain slide bar

4

Chain tensioner

5

Chain tensioning rail

6

Chain slide bar

 Danger !

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 range of the mechanism when moving components.

AS00.00-Z-0009-01A



Remove

1

Detach ground line from battery

AR54.10-P-0003NKB



Notes on battery

AH54.10-P-0001-01A

2

Remove camshafts with camshaft positioners

AR05.20-P-6992MT

 The camshaft positioners remain on the camshafts.

3

Disconnect timing chain (1)

AR05.10-P-7601-01MR

 Rivet press tool

*276589003900



Check

4

Check chain tensioning rail (5) for wear and external damage; replace if necessary

AR05.10-P-8127MT

5

Check chain tensioning rail (3, 6) for wear and external damage; replace if necessary

AR05.10-P-8480MT



Install

6

Draw in new timing chain (1)

AR05.10-P-7601-04MR

 Assembly element

*271589096300

7

Rivet timing chain (1)

AR05.10-P-7601-02MR

 Rivet press tool

*276589003900

8

Install camshafts with camshaft positioners

AR05.20-P-6992MT

 Only install cylinder head cover after checking the basic position of the camshafts.

9

Check basic position of camshafts with an install chain tensioner (4) and correct if necessary

AR05.20-P-6020MT

10

Connect ground line to battery

AR54.10-P-0003NKB

 Danger !

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 an engine test run; in doing so check engine for proper operation and leaktightness