Remove the spark plugs to make it easier to bleed the engine.
8-cylinder engines, remove the rocker arm and hydraulic valve clearance compensator on the intake valves of the first and sixth cylinders.
Instead of the compensator, install the valve adjustment bolt 116 050 11 20 and put the rocker arm back in place. The rocker arm and valve clearance compensator must then be installed in their original position, otherwise it is necessary to check the adjustment of the compensator.
Turn the crankshaft until the top of the cam (4) of the intake valve of the first cylinder is directed vertically upward.
The engine must not be turned by the camshaft wheel bolt and must not be turned backwards under any circumstances during measurements, as this will lead to significant errors in the measurements.
(Original material on the website: «www.mercedesman.ru»)
Select the valve clearance by unscrewing the valve adjusting bolt (2).
Attach the dial indicator to the cylinder head so that the feeler gauge sits on the valve plate with a pre-tension of 3 mm.
Turn the 1/100 mm scale of the dial indicator until the large pointer points to zero. The feeler gauge of the dial indicator should be vertical to the valve disc.
Turn the engine in the direction of its rotation until the small pointer on the dial indicator moves back 1 mm (2mm valve stroke). In this position, read the value on the balancing disk. It should match the value in the table.