11 34 715 Replacing all valve springs (N63)
WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
Necessary preliminary work
- Remove left cylinder head.
- Remove right cylinder head.
- Remove camshafts . See 11 31 036 REMOVING AND INSTALLING/REPLACING LEFT EXHAUST CAMSHAFT (N63) , 11 31 032 REMOVING AND INSTALLING/REPLACING LEFT INLET CAMSHAFT (N63) , 11 31 034 REMOVING AND INSTALLING/REPLACING RIGHT INLET CAMSHAFT (N63) or 11 31 038 REMOVING AND INSTALLING/RENEWING RIGHT EXHAUST CAMSHAFT (N63) .
Mount cylinder head (1) on special tool 11 9 000 .
Prepare 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.
Press 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.
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.
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.
Arrangement:
- Valve
- Valve stem seal with spring cup, bottom
- Valve spring
- Top spring cup
- Valve keys
Assemble engine.