11 34 715 Replacing all valve springs (S65)
Use only the approved special tools.
Plastic rings on the special tools must not be damaged.
Special tools 11 5 821 and 11 5 282 must be modified to special tool 119950 DEVICE .
Necessary preliminary tasks:
- Remove cylinder head .
- Remove all HVCA elements.
Prepare special tool 11 9 006 with special tool 11 9 008.
Insert aluminum profile rail (1) and align.
Secure eccentric clamping levers (2 and 3) in direction of arrow.
Special tool 11 5 281 for removing valve keys.
Special tool 11 5 282 for installing valve keys.
Special tool 11 9 953 for securing valve keys.
Unscrew valve cage from special tool 11 5 281.
Special tool 11 9 951 (1 to 3) must be replaced.
Remove all washers of special tool 11 5 281 (S85).
Insert special tool 11 9 951 in correct order.
Insert washer (1) with collar facing down in valve cage (2).
Insert felt washer (2) with smooth side facing down in valve cage (1).
Insert washer (3) in valve cage (1).
Screw down special tool 11 5 281 with inserted special tool 11 9 951 again.
Modify special tool 11 5 281 with special tool 11 9 951.
Risk of damage to the HVCA guide.
Adjust special tool 11 9 009 so that special tool 11 5 281 can press vertically onto the valve spring.
Press down valve spring with special tool 11 5 281 and keep pressed.
Pretension lever (1) in direction of arrow.
Release lever (1) in tensioned position.
The valve keys still installed are thus forced out and drop into the working chamber of special tool 11 5 281.
Repeat the operation several times if necessary until all the valve keys are forced out.
Pull back lever on special tool 11 5 281.
Valve keys (1) can now be ejected from the working chamber (2).
Progressive valve spring (2).
Upper spring plate (3).
Installation:
Incorrect installation is not possible.
Insert lower spring plate (1).
Press valve key (1) in direction of arrow into special tool 11 9 953.
Secure valve keys (1).
Press valve keys into special tool 11 5 282 with special tool 11 9 953.
Press valve keys into special tool 11 5 282 with special tool 11 9 953.
Special tool 11 5 282 is prepared for installation.
Installation:
Positioning of valve keys (1).
Press down special tool 11 5 282 with special tool 11 9 009 in direction of arrow.
Installation:
Both valve keys are now pressed into their initial positions.
Installation:
Check that valve keys (1) are in correct installation position.
Assemble engine.