Cylinder head, Cylinder head screws, <a href="https://garage.wiki/opel/engines/diesel/straight-4/25-l/s8u-770/79-hp-at-4000-rpm-155-nm-at-2200-rpm.html" title="Opel diesel straight-4 2.5 L S8U 770 79 HP at 4000 RPM, 155 N⋅m at 2200 RPM engine DIY maintenance and service manual">Opel diesel straight-4 2.5 L S8U 770 79 HP at 4000 RPM, 155 N⋅m at 2200 RPM</a>, First stage

by Roman Paulov