Cylinder Head feed identifications

[Jamo]

Can anyone help my identify which holes on the block are the oil feed (s) to the head and which one are the returns from the head?

[terrybullwon]

With out looking at my spare block I would guess the smaller ones to be a pressure feed and the larger to be a return

[Jamo]

Which small ones? as aren't the very small ones coolant?

[Error404]

Gimme 5 i'll go and look

[Error404]

yup 5 large returns to the sump.

Edit: crap description. Deck cooling pics help to show it best:

[Jamo]

Cheers Error

[Acidburn]

I recognise that engine - I should ask for copyright....

[Error404]

what are the marks on the pistons dude? looks like mouse 5hite
maybe from those ones that lived in your boot.. or was it squirrels?

[Acidburn]

what are the marks on the pistons dude? looks like mouse 5hite
maybe from those ones that lived in your boot.. or was it squirrels?

Something was ingested by the engine when it was in the s2cab, it marked this and a little on the head but nothing to worry about.

[Error404]

****! I guess you just dressed them back a bit so you won't get hotspots

[G60Rallye]

Can anyone help my identify which holes on the block are the oil feed (s) to the head and which one are the returns from the head?

I am 99% sure that the oil feed is the hole behind the 3 headstud from the right. Its the one that lines up with the oil pressure switches.

[driftin jo]

I am 99% sure that the oil feed is the hole behind the 3 headstud from the right. Its the one that lines up with the oil pressure switches.

[UrS4boy]

Oil Pressure Sender, Switches and Check Valves

I am 99% sure that the oil feed is the hole behind the 3 headstud from the right. Its the one that lines up with the oil pressure switches.

Perhaps more importantly, it would also line up with the check valve that lives in the block, behind the pressure sender on an UrS4 or ABY or ADU, or on its own for an UrS6, as documented here:

Oil Pressure Sender, Switches and Check Valves:

http://forums.quattroworld.com/s4s6/msgs/96161.phtml

[JP]

Can anyone help my identify which holes on the block are the oil feed (s) to the head and which one are the returns from the head?

Top Headstuds from left to right
2 - oil return
3 - oil return
4 - oil pressure feed (little one in line with pressure sensors like everyone says)

Bottom Headstuds from left to right
1,4,6 big holes oil returns

All the other little holes around the cylinder are waterways

hth

[UrS4boy]

Top Headstuds from left to right
2 - oil return
3 - oil return
4 - oil pressure feed (little one in line with pressure sensors like everyone says)
Bottom Headstuds from left to right
1,4,6 big holes oil returns.
All the other little holes around the cylinder are waterways hth

Just to complete the picture, what is the big hole behind the 5th stud from the left on the top row?