Overview - Camshaft Timing Chains
After performing work on the chain drive the adaptation value in the engine control module must be adapted. To do so, turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:
Engine control module, functions
0001 - Adaptation after repair work on chain drive
- Bolt
- Replace
- 4 Nm +90°
- Chain Tensioner
- is under tension
- Secure with the Tensioner Locking Tool:T40267 before removing
- Timing Chain Tensioning Rail
- Guide Pin
- 20 Nm
- Bolt
- Replace
- Tightening specification and sequence. Refer to Fig 3.
- Adapter Sleeve
- Pulled into the cylinder head with the bolt
- Control Valves
- Left-hand thread
- Depending on the version, remove using the Assembly Tool:T10352/2 or Assembly Tool Assembly Tool:T10352/4 .
- Check using the Vehicle Diagnostic Tester Refer to Fig 2.
- 35 Nm
- Bearing Bracket
- Tightening specification and sequence. Refer to Fig 3.
- Camshaft Timing Chain Guide Rail
- Camshaft Housing
- Camshaft Timing Chain
- Removing and Installing. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .
- Camshaft Timing Chain Guide Rail
- Guide Pin
- 20 Nm
- Three Stage Chain Sprocket
- Crankshaft
- Installation position. Refer to Fig 4.
Checking the control valve
-- The piston -1- must be pushed in approximately 3 mm against the spring force. It must not become stuck while doing so.
Bearing bracket - tightening specifications and sequence
The adapter sleeve will be pulled in the cylinder head with the bolt -1-.
-- Tighten the bolts in the steps in the sequence shown:
Bearing bracket with adapter sleeve and steel bolts
| Step | Bolt | Tightening specification/additional turn for steel bolts |
|---|---|---|
| 1. | -1- | 3 Nm |
| 2. | -1 to 6- | 9 Nm |
Bearing bracket without adapter sleeve and aluminum bolts
| Step | Bolt | Tightening specification/additional turn for aluminum bolts |
|---|---|---|
| 1. | -1 to 6- | 4 Nm |
| 2. | -1 to 6- | 180° |
Three stage chain sprocket - installed position
- Both surfaces -arrows- must align.