Identify these holes.

[Guest]

Looking for help identifying what these are and or go to. I know it sounds noobish but I dont' have a block in front of me right now.

Thanks

Shaun

[Doubt_Incarnate]

im going to guess the one in red is the oil feed for the head, the 2 green ones are probably oil return, and the white one, i dunno, right behind the water pump, i guess water. the appearance in the passages should hint to whats in there, black, green/white/yellow scaley crap. the high side should be the feed otherwise it would flood the heads with oil.

am i right? do i win a cookie!?

[RednBlack]

Those are all "Post Holes"

[Guest]

Ok what does that mean?

Well I have some oiling diagrams and the red holes do appear to be where the oil drains back to teh pan.

The white I have no clue. BLock not here.

The red corresponds to what appears on the head to be a cooling jacket or something of that sort. My heads I bought from a guy on PFF and where the red is at, on the head where this corresponds to, there is no discoloration there at all. Be it from oil, or coolant. It almost looks like it goes to nothing. The chamber comes through the head and then back out to what appears to go into the lower intake, but I dont' have a lower intake here.

So thats where I am stumped. I am not sure if the red is an oil drain or not. But I am pretty sure the greens are. White I am stumped.

[Juglenaut]

I will check mine as I post.

I tell yeah what the red and green are oil passages, and the white is hmmm...most likely water passage.

The front head has all the coolant flow attributed to it, as the t-stat is mounted on the front.

[Guest]

k I think the green and red are oil return.

Still unsure on the white however it also appears by looking at some heads and cam carriers I have here that all areas are for oil return. Based on the size of the holes they can't be to provide oil pressure. Thast just way too big of holes to pressurize. by that small pump.

So looks like this is settled.