Cylinder head, Cylinder head screws, All <a href="https://garage.wiki/opel/engines/cng/straight-4/16-l/z-16-xnt/" title="Opel CNG straight-4 1.6 L Z 16 XNT engine DIY maintenance and service manual">Opel CNG straight-4 1.6 L Z 16 XNT</a> engines, First stage

by Roman Paulov