Check basic position of camshafts

AR05.20-S-6010SE

Check basic position of camshafts

06.10.2016

Engine

642 in model 639

Modification notes

26.09.2016

Document contents completely revised

Operation steps 1 to 7

1

Camshafts

2

Camshaft bracket

3

Hold-down tool

1

Camshafts

5

Markings

7

Timing case cover

4

Markings

6

Belt pulley

Pfeil

TDC marking



Remove

1

Remove fan

AR20.40-S-5614SE

2

Remove both cylinder head covers

AR01.20-S-5011SE

3

Attach hold-down tool (3) to middle camshaft bearing of the cylinder heads

 The hold-down tool (3) assume function of camshaft bearings and relieve the load on camshaft brackets (2).

 Holddown device kit

*642589003100



Check

4

Set piston of cylinder 1 to ignition TDC

 Turn engine at vibration damper in direction of engine rotation until markings (5) on camshafts (1) stand opposite to each other and markings (4), seen in the direction of travel, are aligned on the left side to the upper edge of the cylinder head. The TDC marking (arrow) on the belt pulley (6) must be aligned with the stay on the timing case cover (7).

 Socket wrench bit

*001589650900

If the basic position of the camshafts (1) is incorrect.



Check timing chain

AR05.10-S-7600SE



Install

5

Remove the hold-down tool (3) from the center camshaft bearings of the cylinder heads

 Holddown device kit

*642589003100

6

Install both cylinder head covers

AR01.20-S-5011SE

7

Install fan

AR20.40-S-5614SE