Now I understand. So he forgot to put the seal behind the hole? In the next photo you can see the back of the hole (surrounded in red).
Until now all the photos posted are from my C70. But the next 2 I will show I took from the internet as I have no photo of the engine without a valve cover.
Next photo is engine without valve cover (from internet).
Next photo is engine without valve cover and liquid gasket apply well (from internet).
