Removing and installing camshafts

AR05.20-S-6992A

Removing and installing camshafts

9.9.11



Removing, installing

1

Remove the slide rail in the cylinder head

AR05.10-S-8432A

2

Position the piston of the 1st cylinder at 30° after the PMS

Rotate the engine by the crankshaft

AR01.00-S-0120A

 At 30° of the igniton PMS in the 1st cylinder the camshafts can be rotated without the valves touching the bottom of the piston

3

Mark the camshaft wheels (1) and (4) with colour respect to the timing chain (2) (arrows)

 Installation: Fit the timing chain so that the coloured marks of the timing chain and the wheels of the camshaft coincide, if necessary

check the basic position of the camshafts, if necessary, after checking

AR05.20-S-6010A

correct the adjustment of the camshafts

AR05.20-S-6020A

4

Remove the chain tensioner (9)

 Installation: Dismantle the chain tensioner and assemble it again as described

AR05.10-S-7800A

5

Remove the exhaust camshaft wheel (1)



*000589011000



*BA05.20-N-1001-01A

 Installation: Install the exhaust camshaft wheel (1) with the timing chain (2) fitted
Replace the screws of the camshaft wheel, use them only once

6

Lift the timing chain (2) from the intake camshaft wheel (4)

7

With the aid of the open-end wrench (5) rotate the camshafts (7) and (8) freeing them from tension


 The camshafts are likely to break, so rotate them until the point when, if possible, the base circles of the cams rest on the hollow tappets (the camshafts are to a great extent free from tension in their bearings)

*104589010100

8

Remove the camshaft bearing cap



*000589011000


 Installation: Install camshaft bearing caps at the same point 

*BA05.20-N-1002-01A



Marking of camshaft bearing caps

Engine 111

AH05.20-N-6992-01A

9

Take out the camshafts (7) and (8)

 Installation: Lubricate the valve tappets and the camshaft bearings. Fit the camshafts (7) and (8) in the bearings so that, if possible, the basic circles of the cams are supported on the hollow tappets
Pay attention to the assignment of the camshafts



Camshaft code number and assignment

Engine 111, 112, 113

AH05.20-N-0100-01A

Camshaft code numbers

*BE05.20-N-1001-01A

Camshaft code numbers
repair camshaft

*BE05.20-N-1002-01A

Timing of inlet valve at 2 mm valve and new timing chain

*BE05.20-N-1001-02A

Timing of exhaust valve at 2 mm valve and new timing chain

*BE05.20-N-1002-02A

10

Installation in reverse order

Number

Designation

Engine 111.948

Engine 111.978

BE05.20-N-1001-01A

Index figure of the camshaft

Intake

16

16

Exhaust

24

17

BE05.20-N-1002-01A

Re-conditioned camshaft

Intake

19

19

Exhaust

25

20

Number

Designation

Engine 111.948

Engine 111.978

BE05.20-N-1001-02A

Timing phase intake valve at 2 mm valve stroke and new timing chain

opens after the PMS

°KW

11–15

11–15

closes after PMI

°KW

12–16

12–16

BE05.20-N-1002-02A

Timing phase exhaust valve at 2 mm valve stroke and new timing chain

opens before the PMI

°KW

15–19

18.5–22.5

closes before PMS

°KW

15–19

13–17

Number

Designation

Engine 111.948/
978

BA05.20-N-1001-01A

Camshaft sprocket/flange shaft to camshaft

1st stage

Nm

20

2nd stage

°

60

BA05.20-N-1002-01A

Camshaft bearing cap to cylinder head

Nm

21