Cylinder head, Cylinder head screws, <a href="https://garage.wiki/opel/engines/gasoline/straight-4/20-l/z-20-let/188-hp-at-5400-rpm-250-nm-at-1950-rpm.html" title="Opel gasoline straight-4 2.0 L Z 20 LET 188 HP at 5400 RPM, 250 N⋅m at 1950 RPM engine DIY maintenance and service manual">Opel gasoline straight-4 2.0 L Z 20 LET 188 HP at 5400 RPM, 250 N⋅m at 1950 RPM</a>, First stage

by Roman Paulov