Installing the intake camshaft (cylinder head removed)
- Clean all the bearing positions (arrows) and coat with motor oil.
- Clean all the bearing positions of the intake camshaft bearing cap (E1) to (E6) and (E) and coat with engine oil.
- Clean all the bearing positions (arrows) of the intake camshaft and coat with motor oil.
- Check the fitting sleeves (1) of the thrust bearing (2) for damage, replace if necessary.
- Check all the roller cam followers (1) of the intake side for correct fit.
- Insert the intake camshaft (1) into the cylinder head in such a way that the mark (2) points up.NOTE: RISK OF DAMAGE
Engine damage caused by incorrectly installed bearing shells and bearing brackets.
If the bearing shells and bearing brackets are installed incorrectly, then engine damage can occur.- Always install all bearing shells and bearing brackets in the same position from which they were removed.
- Thread in all intake camshaft bearing caps (E1) to (E6) and intake camshaft bearing cap (E) and position.
- Check the tensile strength of the screws (1) for the bearing cap.
The illustration shows the screw with 8.8 tensile strength .
- Check the tensile strength of the screws (1) for the bearing cap.
The illustration shows the screw with 10.9 tensile strength .
NOTE: TECHNICAL INFORMATION
The camshaft is under tension due to the valve springs. Tighten or loosen each screw on the camshaft bearing caps in the prescribed sequence only by half a turn. Repeat procedure. - Press down the intake camshaft bearing cap and hand-tighten the screws step-by-step in the sequence (1) to (14).
- Bring all screws in the sequence (1) to (14) in half turns onto the surface.
- Observe the joining torque.
- Tighten
all the screws in the sequence (1) to (14).
Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONIntake camshaft to cylinder head M6 Tensile strength of screw 8.8
Joining torque9.6 Nm tightening torque 9.6 Nm M6 Tensile strength of screw 10.9
Joining torque11.8 Nm tightening torque 11.8 Nm