Procedures

Timing chain and components, overview






1 - Camshaft sprocket
For upper chain

2 - Sensor wheel
For Camshaft Position sensor -G40-
Contact surfaces of timing chain and sensor wheel must be dry when installing.


3 - 100 Nm (74 ft lb)
Oil bolt head contact surface when installing.
To remove and install: counter-hold with 24 mm open wrench on camshaft

4 - Pivot pin
25 Nm (18 ft lb)
For tensioning plate

5 - Seal
Replace

6 - Chain tensioner
30 Nm (22 ft lb)
For upper chain
Up to engine number AES 003278 with oil hole for double chain.
Bleed before installing
Beginning with engine number AES-003279 only single chains for camshaft drive are installed. Therefore the tensioner does not have an oil bore and can no longer be bled

Caution: Only turn engine with chain tensioner installed!

7 - Tensioning plate
For camshaft chain
Up to engine number AES 003278 for double chain
As of engine number AES 003279 for single chain

8 - Sprocket
For single chain

9 - Upper chain
Mark direction of rotation before removing
Up to engine number AES 003278 for double chain
As of engine number AES 003279 for single chain

10 - 100 Nm (74 ft lb)

11 - Sprocket
For upper chain

12 - 10 Nm (7 ft lb)

13 - Chain tensioner with tensioning plate
For lower chain
Before installing: release locking spline in chain tensioner with a small screwdriver and press tensioning plate against tensioner.

Caution: Only turn engine with chain tensioner installed!

14 - Crankshaft sprocket
Part of crankshaft
Ground down tooth aligned with main bearing joint: = TDC for Cyl No. 1

15 - Lower chain
Mark direction of rotation before removing


16 - Guide rail
For lower chain
Remove together with lower chain.

17 - Locating pin w/out collar
25 Nm (18 ft lb)
For guide rail

18 - Locating pin with collar
25 Nm (18 ft lb)
For guide rail

19 - 20 Nm (15 ft lb)
Insert using D6 locking fluid

20 - 20 Nm (15 ft lb)

21 - Guide rail
For upper chain

22 - 10 Nm (7 ft lb)
Insert using D6 locking fluid

23 - Thrust washer
24 - Intermediate shaft