Set basic position of camshafts

AR05.20-P-6020A

Set basic position of camshafts

17.12.09



Removing

1

Inspect basic position of camshaft

AR05.20-P-6010A

2

Remove cover on top front of cylinder head

AR01.30-P-5700A

3

Position piston of cylinder 1 at 30° after TDC

 At 30° after top dead center on 1st cylinder the camshafts can be turned without the valves touching the piston crown.

4

Remove chain tensioner (14)

AR05.10-P-7800A

5

Remove exhaust camshaft sprocket (78)



*000589011000

6

Lift timing chain (73) off intakecamshafttiming gear (75)

7

Turn/lock camshafts in basic position



 Lock camshafts with fixing pins (01) through the bores in camshaft bearing caps 1 and 6 in the bores in the camshaft flanges.

*104589010100



*111589031500

8

Reset piston of 1st cylinder to 20° after top dead center

 In the process pull the timing chain upwards so that it is tight.



Install

9

Fit the timing chain (73) at intake camshaft sprocket (75)

 Engine with camshaft adjustment: The circumferential end stops on the intake camshaft sprocket (75) must be in the "late" position (position of end stops in cutouts of stub shaft), (arrow).

10

Install exhaust camshaft sprocket (78) with timing chain (73) put on



 Replace camshaft sprocket bolts, only use them once

*BA05.20-P-1001-02A



*000589011000

11

Install chain tensioner (14)

 If the complete chain tensioner is slackened, it must be removed, disassembled and reassembled as described.

AR05.10-P-7800A

12

Remove fixing pins (01)



*111589031500

13

Inspect basic position of camshaft

to do this, turn engine twice in the direction of engine rotation.

AR05.20-P-6010A

Number

Designation

Engine 111

BA05.20-P-1001-02A

Bolt for camshaft sprocket/flange shaft

Stage 1

Nm

20

Stage 2

°

60