Cylinder head, Cylinder head screws, <a href="https://garage.wiki/bmw/engines/gasoline/straight-6/25-l/m52-b25-256s4/168-hp.html" title="BMW gasoline straight-6 2.5 L M52 B25 (256S4) 168 HP engine DIY maintenance and service manual">BMW gasoline straight-6 2.5 L M52 B25 (256S4) 168 HP</a>, Aluminium engine block, First stage

by Roman Paulov