Removing and installing/replacing all rocker arms (S55 engine)
Special tools required:
- 11 4 481
- 11 4 482
Necessary preliminary work:
- Remove CYLINDER HEAD COVER .
- Remove INTERMEDIATE LEVER .
- Remove EXHAUST CAMSHAFT .
The tolerance classes are marked according to the illustration with numbers from 2 to 4.
Numbers 1 and 5 are used for Service.
Already used roller cam followers (1) may only be reused in the same position.
Loosen and remove roller cam followers (1) from hydraulic valve clearance compensating element.
Place all roller cam followers (1) in neat order on special tool 11 4 481.
Installation note:
Prior to installation of intermediate levers, ensure proper installation position of roller cam followers (1).
Classification of roller cam follower intake.
Standard: Number 3. standard.
Number 2. slow idle.
Number 4. fast idle.
In case of repair: rough idling speed.
Repair: 1
Number 1. slow speed in idle.
Number 5. high speed in idle.
Loosen and remove roller cam followers (1) on exhaust side from hydraulic valve clearance compensating element.
Place all roller cam followers (1) in neat order on special tool 11 4 482.
Installation note:
Prior to installation of exhaust camshaft, ensure proper installation position of roller cam followers (1).
No classification is required for the exhaust camshaft.
Remove hydraulic valve clearance compensating element (1) on intake side in direction of arrow.
Installation note:
When the hydraulic valve clearance compensating element (1) is used again, it must be placed properly arranged together with the rocker arms in special tool 11 4 481.
Remove hydraulic valve clearance compensating element (1) on exhaust side in direction of arrow.
Installation note:
When the hydraulic valve clearance compensating element (1) is used again, it must be placed properly arranged together with the rocker arms in special tool 11 4 482.
Assemble engine.
Check the DME for function and adjust the uniform mixture distribution, if applicable.