Cylinder head, Cylinder head screws, <a href="https://garage.wiki/opel/engines/cng/straight-4/16-l/a-16-xnt/148-hp-at-5000-rpm-210-nm-at-2300-rpm.html" title="Opel CNG straight-4 1.6 L A 16 XNT 148 HP at 5000 RPM, 210 N⋅m at 2300 RPM engine DIY maintenance and service manual">Opel CNG straight-4 1.6 L A 16 XNT 148 HP at 5000 RPM, 210 N⋅m at 2300 RPM</a>, First stage

by Roman Paulov