Remove the valve cover and install the brand of the camshaft. The brand is stamped on the rear end of the camshaft.
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.
Replace the compensator with adjusting valve screw 116 050 11 20 and reattach the rocker arm. The rocker arm and valve clearance compensator must then be installed in their original position, because. otherwise it is necessary to check the adjustment of the compensator.
Rotate the crankshaft until the top of the cam (4) the intake valve of the first cylinder will not be directed vertically upwards.
The engine must not be turned by the camshaft wheel bolt and during measurements it must not be turned back in any case, because. this will lead to significant measurement errors.
Select valve clearance by unscrewing the adjusting bolt (2) valve.
Fasten the dial gauge to the cylinder head so that the feeler gauge sits on the valve disc with a pretension of 3 mm.
Rotate the 1/100 mm scale of the indicator until the large pointer points to zero. The dipstick of the dial gauge must be vertical to the valve head.
Rotate the engine in the direction of rotation until the small pointer of the hour indicator moves back 1 mm (2mm valve travel). In this position, read the value on the balancing disk. It must match the table value.