BMW 5251 Service Manual page 208

11 6-32
Cylinder Head and Valvetrain
4
Install secondary chain tensioner (arrows). Keep tensioner
compressed using BMW special tool 11 3
292
or suitable pin.
4
Fit exhaust camshaft splined sleeve. Confirm that gap in
sleeve splines aligns with corresponding gap in carnshaft
splines (arrows).
Slide splined shaft onto exhaust camshaft so that locating
tooth of shaft fits into spline gaps of camshaft and splined
sleeve (arrows).
-
Push splined shafl in further to rotate splined sleeve until the
three threaded holes in primary chain sprocket are centered
in the small slots of the splined sleeve.