After inspecting my intake yesterday I'm really puzzled as to what this port is for? My dad said he thinks it is an oil fill passage but I'm not sure and I'm not sure what you are suppose to use to cap it off ?

Can anyone explain what this is for?

Yes,
It is for an oil fill tube.
Plug it with a freeze plug.

So like when changing oil, you can fill it up through there instead of the dip stick? If so, is there a plug that I can use that I can pull out easily but seals well?

I don't know about everybody else, but I always fill the oil through the valve cover and not the dipstick. I would like to see that done though :confused:

If your valve covers don't have holes for a fill and/or breather, you will have to have some type of breather to relieve internal pressure inside the engine.

If you are going to use the intake to do so, it need a fill tube, with a baffled cap on top like the factory used.

Dstryr,

Before Chevy put the oil filler in the valve covers, ( 67-68??), they used to use that hole with an extended filler tube to add oil. It drops right down into the lifter valley so like Lowend stated, seal it up with a brass freeze plug and fill through the valve covers.

Or get a chrome fill tube and non-breather cap from any resto place, look pretty cool and handy too. Had them back in the 60s on high HP 327s.

I bet you'd really be wondering if you found an older block with the hole in the back for the breather and the big can under the intake!

As others have replied that was where the oil fill was on a Chevy motor before they ever put a cap, plug or any hole in a valve cover. look at pictures of early Vette engines and they had the prettiest valve covers with no junk in them.
Any plug that would pull out easily wouldn't seal well. If you have an oil fill in your valve cover just plug the hole with a freeze plug. If not then just buy a replacement tube and oil cap for an older Chevy motor.

I wont beable to get to the car for another couple days. What size freeze plug will I need so I can have it handy when Im there to finish up things?

THanks
Dstryr

I bet you'd really be wondering if you found an older block with the hole in the back for the breather and the big can under the intake!

As others have replied that was where the oil fill was on a Chevy motor before they ever put a cap, plug or any hole in a valve cover. look at pictures of early Vette engines and they had the prettiest valve covers with no junk in them.
Any plug that would pull out easily wouldn't seal well. If you have an oil fill in your valve cover just plug the hole with a freeze plug. If not then just buy a replacement tube and oil cap for an older Chevy motor.
I haven't thought about those old breathers in the lifter galley for a loooong time.. lol! Kinda showin' your age???:rolleyes:

I used one of the rubber expandable plugs used to temporarilly fix a freeze plug. This way I could remove it when I wanted. Looks like the one in the picture below.

http://automedia.com/article/images/ccr/ccr20070401fp/ccr20070401fp_s05.jpg

http://store.summitracing.com/partdetail.asp?part=PRO%2D66020&view=32&N=700+115

Is this the filler tube you guys were talking about?

Yep, that's it. You will also need a push-on breather.

Well I'd much rather just plug that hole for good. Where can I find a correct freeze plug or even that rubber one? I looked in summit but couldnt find something to plug it with.

Bump . I dont want to be a pest but im under shitty time limits so could someone help :/

Any good parts store should carry a good assortment of freeze plugs.

I wont beable to get to the car for another couple days. What size freeze plug will I need so I can have it handy when Im there to finish up things?

THanks
Dstryr
I dont know, and I dont have one handy, but I'll bet its over an inch and less than an inch and a half. Buy several sizes and return the ones ya dont use.

Couldnt be more than three or four to choose from in that size range.

The parts store guys dont mind... do they Leo? lol

Any good parts store should carry a good assortment of freeze plugs.

just wag the intake down there, plop it on the counter and I bet they can figure it out. Get a brass freeze plug and don't pound it in the hole until the manifold is bolted down. The rail along the end of the lifter valley will provide support to help prevent cracking the intake when you insert the plug.

You can get the rubber plugs in the help section.

Dont forget a little teflon sealant.It might look better if you install it from underneath.
Yea Mark its amazing how many you can get for a cold soda.:shy:
I got tons of them at work.

Yea Mark its amazing how many you can get for a cold soda.:shy:
.


Maybee a pocket full?;):innocent: