200 Head Oil Path

[Anonymous]

My machinist is rebuilding my 200 ci head. Due to the amount of metal removal to achieve the right compression. He says this will effect the oil flow paths in the head.
I'll be talking to him face to face friday, but if anybody has feedback on this please feel free to let me have it!....ZZ

 

[Asa]

how much have you had removed?

i don't think that anyone yet has had problems with oil flow... i could be wrong, but i'm pretty sure it hasn't come up
maybe it's a problem with V8s and he's not familiar with the inlines? i dunno, it's a thought

 

[Hot 6t Falcon]

ZZ,

If you're milling .030 to .070 you shouldn't have a big concern, especially if you're using a composite gasket (Felpro, Napa, etc.) in place of the steel shim gasket.

The passage he is concerned about is a kidney shaped indent that flows the oil from the oil passageway in the block up alongside the #11 headbolt and into the head's oil passageway.

This picture shows the general route of the oil to the head

The picture shows the kidney shapped passageway in the head. When the head is SEVERLY milled, this passage becomes very thin. The only time I've ever ground it deeper was on a D4 head that I angled milled .110". I have often polished and shaped the passage to get more flow.

I am usually more concerned about getting oil passed the head bolt to the rockers. I always recommend using a 70's head bolt on the 60's block because of it's tapered shank.

Hope I've helped.

All of these pictues are from the Ford Falcon SIX Cylinder performance Handbook page 41.

Good Luck