head studs v bolts/ #11

[chad]

I've seen on here that the number eleven head bolt is modified differently than the others (#13 shortened, if needed & thread sealed to avoid rust/impeller contact).
I have an experienced friend assembling the freshly machined motor. He is using the ARP studs from CI. How do I customize (if required) the # 11 to accommodate the oil flow needed? Should I try to find a single #11 original head bolt ('75 - '83) to use there on this '69 motor?
Thanks as usual!

 

[RichCreations]

I've seen on here that the number eleven head bolt is modified differently than the others (#13 shortened, if needed & thread sealed to avoid rust/impeller contact).
I have an experienced friend assembling the freshly machined motor. He is using the ARP studs from CI. How do I customize (if required) the # 11 to accommodate the oil flow needed? Should I try to find a single #11 original head bolt ('75 - '83) to use there on this '69 motor?
Thanks as usual!

everything I have seen says leave the stud as is, but open up the hole in the head from the existing shoulder to the deck surface a bit.

 

[chad]

so use a light touch and 'champher' the hole at exit on both head and block just to rid the ridge (sharp left-overs) from the mill cut?
Or is it just to one side or the other?
No real attention to the stud?

Thanks for the pointer.
Spent it all on the rebuild so can't get running again if this sezes due to lack of oil/lube.

 

[Econoline]

I've been wondering about this myself. So Rich, you're saying it may be good to slightly enlarge the stud hole from the shoulder in the stud passage, above where the oil passage enters, to the mating surface of the head?

 

[RichCreations]

I've been wondering about this myself. So Rich, you're saying it may be good to slightly enlarge the stud hole from the shoulder in the stud passage, above where the oil passage enters, to the mating surface of the head?

Exactly...

 

[chad]

There is a small oil passege nxt to that stud/bolt as well. Totally seperate. But both seem to be the only way to get the oli to the rockers.
Leave the stud/it's 'hole' alone (as well as the stud) & work the passage nxt to it…
No attention to the # 11 stud/bolt it'self. The littrature seems to indicate both pass oil.
Or work both? Just depends on what the mill pass leaves?