11 31 025 Removing and installing/replacing inlet camshaft (N52K)
Special tools required:
- 11 4 281
- 11 4 481
The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
Necessary preliminary tasks:
- Remove cylinder head cover
- Remove inlet adjustment unit
- Remove intermediate lever, see 11 37 010 Removing and installing/replacing intermediate levers (N52K) .
- Adjust valve timing, see 11 31 505 Adjusting timing of camshaft(s) (N52K) .
Bearing cap (1) is a thrust bearing.
Release screws on bearing caps 1 to 6 (1 and 2).
Tightening torque: 11 31 2AZ, see 11 31 CAMSHAFT .
Set all bearing caps down in special tool 11 4 481 in a tidy and orderly fashion.
Remove inlet camshaft (2) towards top.
Installation:
Clean all bearing points and lubricate with oil.
Check plain compression rings (1) for damage and replace if necessary.
Plain compression rings (1) are engaged at joint.
Press plain compression rings (1) apart upwards and downwards and removed towards front.
Mixing up the inlet and exhaust camshaft will result in engine damage .
Insert inlet camshaft (1) so that part number on twin surface points upwards.
Position inlet camshaft (1) so that cams point upwards at an angle.
Attach special tool 11 4 281 to twin surface.
Assemble engine.