Are the large oil drain passages (one at front and one at the back of each head) the ONLY oil passages in the head?

Is there any oil passage between the block and the head, or are all the holes for coolant or bolts?

Reason I ask: It seems that I've got oil seeping from the head gasket under the #1 and #8 cylinders.

Thanks,
Rob
95Z28

 

I dont believe thre are any Oil passages for the heads from the block. I want to say the draining is at the rear but i'm not sure- i forgot. I have some Lt1 head blue prints on my computer, i'll check it out for ya, but those things have a bazillion lines...

 

looking at the blue prints-
there is ont at the front and rear i think-
i'll post pics in a min

 

http://www.worldisround.com/articles/15303/photo2.html
the things in the corners look like them

FIXED LINKY

 

Yep, those are the ones I was referring to. Cool pic! They actually drain into the lifter valley so I'm wondering how I'm getting oil down at the head gasket under the #1 and #8 exhaust ports. If there are no other oil passages.....hmm.

I don't think it's coming from the head bolt holes. Those are either blind holes or run into water jackets, correct?

Somehow oil is leaking down there. Maybe I have to take a much closer look at the intake manifold to head junction and make sure it's not running down from there. That would make more sense to me. I've looked several times at the block to intake manifold junction (where it's common for LT1s to leak) but that looks dry.

Rob
95Z28