Download BMW Master Cam Tools DIY

#44
Remove the intake cam sprocket bolt, then remove the intake cam sprocket and
secondary timing chain.
The bolt should have already been loosened in a previous step.
#45
Cam sprockets and secondary timing chain removed.
Repeat the process on cylinder bank 1-4.
#46
This is a really good time to carefully clean all of your gasket surfaces.
Now we will begin reassembly.
#47
Start by installing new secondary timing chains onto intake cam sprockets, then
slide sprockets onto the intake camshafts as shown.
Install torx head sprocket bolts finger tight, then back out 1/4 turn.