BMW 7 Series: Replacing All Valve Springs (N63)
Necessary preliminary work
- Remove LEFT CYLINDER HEAD.
- Remove RIGHT CYLINDER HEAD.
- Remove camshafts.
Mount cylinder head (1) on special tool 11 9 000.
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Fig. 292: Mounting Cylinder Head On Special Tool 11 9 000
Prepare special tool 11 9 008 on special tool 11 9 006.
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Fig. 293: Preparing Special Tool 11 9 008 On Special Tool 11 9 006
Position special tool 11 9 006 with silicone cushion on cylinder head.
Slide locks (1) in direction of arrow and pretension with eccentric shaft.
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Fig. 294: Sliding Locks In Direction Of Arrow And Pretension With Eccentric
Shaft
Press down valve spring with special tool 11 8 840.
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Fig. 295: Pressing Down Valve Spring With Special Tool 11 8 840
Remove valve cotters (1) with a magnet.
Place valve springs and valve keys on special tool 11 4 480 in an orderly manner.
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Fig. 296: Identifying Valve Cotters
IMPORTANT: Incorrect assembly possible.
Incorrect assembly will result in valve spring breakage.
Color marking (1) is normally on lower end of valve spring.
Only the diameter is decisive for the correct installation of the valve springs.
Install valve spring so that larger diameter points to spring plate at bottom.
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Fig. 297: Dimensions Of Valve Spring
Arrangement:
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Fig. 298: Exploded View Of Valve Assembly
- Valve
- Valve stem seal with spring cup, bottom
- Valve spring
- Top spring cup
- Valve keys
Assemble engine.
READ NEXT:
Replacing All Valve Stem Seals (N63)
Notes
IMPORTANT: Risk of damage to sealing lip on valve stem seal.
Fit new valve stem seals only when all valves have been installed.
Necessary preliminary work
Remove all VALVE SPRINGS.
Press spe
Adjusting Camshaft Timing On Left Side (N63)
Notes
IMPORTANT: Release central bolts on adjuster only with special tool 11 9
890.
Risk of damage to timing drive.
If special tool 11 9 890 can not be fitted, it is necessary when releasing the
ce
SEE MORE:
Removing And Installing/Replacing Front Lower Strap Fitting (Belt
Tensioner), Front Passenger Seat
Necessary preliminary work
Remove FRONT PASSENGER SEAT
Installation note:
Microencapsulated screws (Loctite) must be replaced and may not be
reused
Screw connection must be completed within 20 minutes (start of
hardening)
Microencapsulated screws must not be retightened
Clean thread of n
Front collision mitigation
Concept
The system may prevent some accidents. In the
event of an accident, the system may reduce impact
speed.
The system sounds a warning before an imminent
collision and activates brakes independently,
if needed.
General information
Depending on the equipment version, the system
is controlled by
