Oil feed from the head, different sizes?

[kennyg]

Just curious if there was ever different threads used on the head for the oil feed line?

I have an auto now that I just picked up and the hole/threads are bigger Than on my two other cylinder heads I have in the garage.

Or is it what I'm thinking and the guy had it drilled and retapped a bigger size? Cause this is new to me and the factory oil feed line I just ordered won't work

 

[bryanwheat]

Sounds like someone modified it. I've never encountered one that was a different diameter.

 

[92AWDHX40]

They should the same size.

 

[Tyeler18]

On the auto and manual 6/7 bolt mine have all been the same size. Sounds modified to me as well.

 

[kennyg]

Thanks for the quick response guys, I didn't think I ordered the wrong part.

Think I'm just gonna block it off and source from the ofh, not in the mood to swap to one of the other heads I have

One last quick question,

The guy before had made his own feed line and he had cross threaded it into the head, when I plug it what should I use so it doesn't leak? Rtv sealent or put a bead of in weld around it maybe?