Cylinder head, Cylinder head screws, <a href="https://garage.wiki/opel/engines/diesel/straight-6/25-l/25-dt/129-hp.html" title="Opel diesel straight-6 2.5 L 25 DT 129 HP engine DIY maintenance and service manual">Opel diesel straight-6 2.5 L 25 DT 129 HP</a>, First stage

by Roman Paulov