Removing and Installing / Replacing Inlet Adjustment Unit
11 36 042 Removing and installing/replacing intake adjuster (N18)Special tools required:
Important!
Mount special tool 11 9 550 to open central bolts on adjusters and camshafts.
The timing is not determined at firing
TDC of cylinder no. 1.
Modified procedure for timing adjustment.
All pistons are in the 90° position.
Check locking of adjusters.
Necessary preliminary work:
^ Remove cylinder head cover.
^ Check timing.
Slide in special tool 11 9 590 in direction of arrow.
Rotate flywheel (1) at central bolt until TDC firing position at cylinder No. 1 is reached.
Important!
The OT hole can be accidentally mixed up.
Important!
Check lock on VANOS unit.
Turn camshaft in direction of rotation at hexagon head.
The adjusters are locked in the initial position when the camshafts are nonpositively connected to the adjusters.
If no fixed connection to the camshaft can be established, the adjuster is faulty and must be replaced.
Place special tool 11 7 440 onto the camshafts and secure using the two screws (1).
Release chain tensioner (1) (have a cleaning cloth ready).
Tightening torque: 11 31 4AZ.
Release screw (1).
Unfasten screws (2).
Remove slide rail (1).
Important!
Only release and secure central bolts (1 and 2) using special tool 11 7 440.
Release central bolts (1 and 2).
Take VANOS units off of the timing chain.
The intake and exhaust camshaft adjusters are different.
VANOS is marked with IN for the intake camshaft.
VANOS is marked with EX for the exhaust camshaft.
Position exhaust camshaft adjuster (2) at exhaust camshaft.
The installation position of the camshaft adjusters can be freely selected.
Screw in central bolt (3) and release again by 90°.
Position intake camshaft adjuster at intake camshaft.
The installation position of the adjuster can be freely selected.
Screw in central bolt (1) and release again by 90°.
Install tensioning rail (1).
Insert bolts (2).
Insert screw (1).
Tightening torque. 11 31 2AZ.
Screw special tool 11 9 340 into the cylinder head.
Pretension timing chain with special tool to 0.4 Nm.
Secure central bolt (1) with special tool 00 9 120.
Tightening torque: 11 36 1AZ.
Secure central bolt (1) with special tool 00 9 120.
Tightening torque: 11 36 1AZ.
Fit chain tensioner.
Check timing.
Assemble engine.
N18:
