F engine experts: What is this hole for? (1 Viewer)

[mrjordann]

Hi, here's context: I'm rebuilding a 5/1973 F engine. Old oil pump is discontinued, so I had to fabricate a new oil pump output line to make the new style oil pump fit. The new custom line fits great into the threaded hole, but there is another threaded hole next to it, and I cannot figure out what this hole is for. Anybody know?

I didn't think anything went in there, but it is threaded and seems very important so I thought I should ask on here. Please let me know what you know. Thank you!

 

[shelfboy1]

dip stick?

 

[S4Cruiser]

I think it’s the return....but I am not 100%. I do know that one hole is left open. Guess they just decided to thread it?

 

[mrjordann]

No, dipstick is on the other side.

 

[Rigger]

Can’t help with your question, but sure looks like you’re doing a great job.

 

[mrjordann]

Can’t help with your question, but sure looks like you’re doing a great job.

Thanks. Might look like I'm doing a pro job, but this oil pump swap is making me real nervous

 

[S4Cruiser]

 

[mrjordann]

View attachment 1823267

Hey thank you! You think it's supposed to be open then?

If it's for the oil bypass, I might not even need it because my new style oil pump has one built in.

 

[pjohnson]

Sounds like a hole that needs no more attention

 

[65swb45]

Hey thank you! You think it's supposed to be open then?

If it's for the oil bypass, I might not even need it because my new style oil pump has one built in.

Wrong. If you are using the external regulator and remote filter, that hole still needs to remain open.