Clearances in the valve drive mechanism. The normal clearance between the rocker eccentric and the end of the valve stem, measured with a feeler gauge on a cold engine, is 0.15-0.20 mm for intake and exhaust valves of 4-cylinder engines, 0.25-0.30 mm for 6-cylinder engines.
Adjustment of gaps in the valve drive mechanism of BMW engines «518», «520»
Adjustment of gaps in the valve drive mechanism of BMW engines «525», «528»
The engine crankshaft can only be turned using the camshaft sprocket using tool 7008/1.