600SEL (140.057) V12-6.0L (120.980) (1993)
1
Rotate crankshaft into 30° position after TDC at cylinder 1 with wrench 001 589 65 09 00 (arrow).
In this position, the camshafts can be rotated without the valves coming into contact with the piston crown.
2
Remove chain tensioner.
3
Unscrew right exhaust camshaft sprocket (5), remove.
4
Remove right guiding blade (4) and left guide rail of cylinder head.
5
Rotate camshafts with wrench 104 589 01 01 00 until the 4 mm holes in the camshaft flanges (arrows) are at the top edge of the cylinder edge.
Lift timing chain off camshaft sprockets for performing this step.
Check with 4 mm diameter pins (1) (111 589 03 15 00).
6
Rotate crankshaft back In opposite direction of rotation of engine to TDC position (arrow) with wrench 001 689 65 09 00. Lift timing chain off