Checking engine valve timing

AR05.10-P-6858RT

Checking engine valve timing

6.12.05



Removing

1

Remove cylinder head covers

AR01.20-P-5014RT

2

Remove right combination valve



Checking

3

Inspect timing

Inlet

*BE05.20-P-1001-02F

Outlet

*BE05.20-P-1002-02F



Camshaft code number and assignment

AH05.20-N-0100-01A

4

Position engine to a 40° crank angle after ignition TDC of cylinder 1

 Rotate engine at crankshaft in direction of rotation until 40° marking on belt pulley/vibration damper is aligned with marking on timing case cover. Grooves on the camshafts must point in the direction of inner V.

 The engine must not be turned backwards; otherwise the timing chain can get jammed.

5

Check basic position of camshafts

 Place locating plate (2) for the right camshaft flush on the right cylinder head and insert it into the keyway (6) of the camshaft. Proceed same way with the left camshaft in the left cylinder head.

 Locating plate

*112589003200

 Locating plate

*112589013200

 If both locating plates cannot be inserted into the grooves: 

Set the basic position of camshafts

AR05.20-P-6020RT



Install

6

Fit right combination valve

Replace seal on combination valve.



*BA09.20-P-1001-01D

7

Install cylinder head covers

AR01.20-P-5014RT

Number

Designation

Engine 113.960/
961/962/
963/964/
965/967/
968/971 on the left

Engine 113.960/
961/962/
963/964/
965/967/
968/971 on the right

BE05.20-P-1001-02F

Timing of inlet valve with 2 mm play and used timing chain

opens after TDC

°CA

30.9

32.5

closes after BDC

°CA

25.7

27.3

BE05.20-P-1002-02F

Timing of exhaust valve with 2 mm play and used timing chain

opens before BDC

°CA

23.2

21.6

opens after BDC

°CA

-

-

closes before TDC

°CA

9.1

7.5

Number

Designation

Engines
112, 113

BA09.20-P-1001-01D

Bolt, intake manifold to cylinder head

M8

Nm

20