BMW 5251 Service Manual page 226

1 16-50
/Cylinder Head and Valvetrain
4
Rotate camshafts until marker bores (insets) point upwards,
4
Secure camshafts in TDC position using BMW special tools:
Cylinders 5-8
Align camshafts w~th open-end 27 mm wrench so BMW
special tools fit on cylinder heads without gaps. Secure
11 2 242
11 2 446
tool using number 8 cylinder spark plug hole.
CAUTION-
Do not damage the cylinder head. If necessary, machine
open-end wrench to fit.
Timing chains and tensioners, installing (M62 engine)
4
Fit secondary sprocltets and chain to camshafts on right cyl-
inder head. Center slots in sprocltets to threaded bores in
end of camshafts (arrows).
. .