Cylinder head, Valve cover, <a href="https://garage.wiki/opel/engines/gasoline/straight-4/16-l/a-16-xht/168-hp.html" title="Opel gasoline straight-4 1.6 L A 16 XHT 168 HP engine DIY maintenance and service manual">Opel gasoline straight-4 1.6 L A 16 XHT 168 HP</a>

by Roman Paulov