The water jacket hole next to cylinder 2 (pointing screwdriver) seems either to be made sealed or clogged, I tried to see if I can dig into but i don’t want to damage it by mistake Is this typical? Thx
All the head bolts came out however I popped fReese plug and on inside seems to be a ridge beneath whatever that is
I don't know if this helps because this is a 241 , but there is no hole in this block at that location. If nothing else I'll get you back to the top.
What does the other bank look like? The hole in gasket may be there only so that it can be used on either side. What you are seeing may just be a bit of corrosion; that 241 block certainly doesn't have a hole there.
It's been like forever since I've had one of those off. But, I think you'll find the gasket fits both sides but only one has that hole. Take a look at the other bank.